Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

____________________________________________________

FORM 10-K

____________________________________________________

(Mark One)


x			ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2023


o			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from ______ to ______

Commission file number 0-18914

____________________________________________________

DORMAN PRODUCTS, INC.

(Exact name of registrant as specified in its charter)

____________________________________________________


Pennsylvania			23-2078856
(State or other jurisdiction of incorporation or organization)			(I.R.S Employer Identification No.)

3400 East Walnut Street, Colmar, Pennsylvania 18915

(Address of principal executive offices) (Zip Code)

(215) 997-1800

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class:

Trading Symbol(s)

Name of each exchange on which registered:

Common Stock, $0.01 Par Value

DORM

The NASDAQ Stock Market LLC

Securities registered pursuant to Section 12(g) of the Act: None

____________________________________________________

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes x No o

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes o No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act:


Large Accelerated Filer	x	Accelerated filer	o

Non-accelerated filer	o	Smaller reporting company	o

		Emerging growth company	o

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issues its audit report. x

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. o

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). o

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes o No x

The aggregate market value of the voting and non-voting common equity held by non-affiliates of the registrant as of July 1, 2023 was $1,726,548,778.

As of February 22, 2024, the registrant had 31,086,242 shares of common stock, $0.01 par value, outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Certain portions of the registrant's definitive proxy statement, in connection with its 2024 Annual Meeting of Shareholders, to be filed with the Securities and Exchange Commission within 120 days after December 31, 2023, are incorporated by reference into PART III of this Annual Report on Form 10-K.

DORMAN PRODUCTS, INC.

INDEX TO ANNUAL REPORT ON FORM 10-K

December 31, 2023


		Page
	PART I

ITEM 1.	Business	2
ITEM 1A.	Risk Factors	9
ITEM 1B.	Unresolved Staff Comments	23
ITEM 1C.	Cybersecurity	23
ITEM 2.	Properties	25
ITEM 3.	Legal Proceedings	26
ITEM 4.	Mine Safety Disclosures	26
ITEM 4.1	Information about Our Executive Officers	26

	PART II

ITEM 5.	Market for Registrant's Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities	29
ITEM 6.	[Reserved]	30
ITEM 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	31
ITEM 7A.	Quantitative and Qualitative Disclosures about Market Risk	40
ITEM 8.	Financial Statements and Supplementary Data	41
ITEM 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	70
ITEM 9A.	Controls and Procedures	70
ITEM 9B.	Other Information	73
ITEM 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	73

	PART III

ITEM 10.	Directors, Executive Officers and Corporate Governance	74
ITEM 11.	Executive Compensation	74
ITEM 12.	Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters	74
ITEM 13.	Certain Relationships and Related Transactions, and Director Independence	75
ITEM 14.	Principal Accounting Fees and Services	75

	PART IV

ITEM 15.	Exhibits and Financial Statement Schedules	76
ITEM 16.	Form 10-K Summary	76

Effective October 4, 2022, the Board of Directors of Dorman Products, Inc. approved a change in Dorman’s fiscal year end from the last Saturday in December of each year to December 31 of each year, to commence with the fiscal year ending on December 31, 2022.

References to

Refers to the year ended

Fiscal 2021

December 25, 2021

Fiscal 2022

December 31, 2022

Fiscal 2023

December 31, 2023

As used herein, unless the context otherwise requires, “Dorman,” “the Company,” “we,” “us,” or “our” refers to Dorman Products, Inc. and its subsidiaries.

This Annual Report on Form 10-K contains the registered and unregistered trademarks or service marks that are the property of Dorman Products, Inc. and/or its affiliates. This Annual Report on Form 10-K also may contain additional trade names, trademarks or service marks belonging to other companies. We do not intend our use or display of other parties’ trademarks, trade names or service marks to imply, and such use or display should not be construed to imply, a relationship with, or endorsement or sponsorship of us by these parties.

Statement Regarding Forward-Looking Statements

Certain statements in this document constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, including statements related to net sales, diluted earnings per share, gross profit, gross margin, selling, general and administrative expenses, income tax expense, income before income taxes, net income, cash and cash equivalents, indebtedness, liquidity, the Company’s share repurchase program, the Company’s outlook, the Company’s growth opportunities and future business prospects, operational costs and productivity initiatives, inflation, customs duties and mitigation of tariffs, long-term value, acquisitions and acquisition opportunities, investments, cost offsets, quarterly fluctuations, new product development, customer concessions, and fluctuations in foreign currency. Words such as “may,” “believe,” “demonstrate,” “expect,” “estimate,” “forecast,” “project,” “plan,” “anticipate,” “intend,” “should,” “will” and “likely” and similar expressions identify forward-looking statements. However, the absence of these words does not mean the statements are not forward-looking. In addition, statements that are not historical should also be considered forward-looking statements. Readers are cautioned not to place undue reliance on those forward-looking statements, which speak only as of the date the statement was made. Such forward-looking statements are based on current expectations that involve a number of known and unknown risks, uncertainties and other factors (many of which are outside of our control) which may cause actual events to be materially different from those expressed or implied by such forward-looking statements. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those anticipated, estimated or projected. For information concerning factors that could cause actual results to differ materially from the information contained in this report, reference is made to the information in PART I, ITEM 1A, “Risk Factors.” The Company is under no obligation to (and expressly disclaims any such obligation to) update any of the information in this report if any forward-looking statement later turns out to be inaccurate whether as a result of new information, future events or otherwise.

PART I

ITEM 1. Business.

General

We are one of the leading suppliers of replacement and upgrade parts in the motor vehicle aftermarket industry, serving passenger cars, light-, medium-, and heavy-duty trucks, as well as specialty vehicles, including utility terrain vehicles (UTVs) and all-terrain vehicles (ATVs). As of December 31, 2023, we marketed approximately 133,000 distinct parts compared to approximately 129,000 as of December 31, 2022, many of which we designed and engineered. This number excludes private label stock keeping units and other variations in how we market, package and distribute our products, includes distinct parts of acquired companies and reflects distinct parts that have been discontinued at the end of their lifecycle. Our products are sold under our various brand names, under our customers’ private label brands or in bulk. We are one of the leading aftermarket suppliers of parts that were traditionally available to professional installers and consumers only from original equipment manufacturers (OEMs) or salvage yards. These parts include, among other parts, leaf springs, intake manifolds, exhaust manifolds, window regulators, radiator fan assemblies, tire pressure monitor sensors, exhaust gas recirculation (EGR) coolers, UTV windshields, and complex electronics modules. For fiscal 2023, approximately 78% of our products were sold under brands that we own, and the remainder of our products were sold for resale under customers' private labels, other brands or in bulk. We generate most of our net sales from customers in North America, primarily in the United States. Our products are sold primarily through aftermarket retailers, including through their on-line platforms; dealers; national, regional and local wholesale distributors and specialty markets; and salvage yards. We also distribute aftermarket parts outside the United States, with sales primarily into Canada and Mexico, and to a lesser extent, Europe, the Middle East and Australia.

The Motor Vehicle Aftermarket Industry

We sell our parts in three different sectors of the motor vehicle aftermarket industry: light-duty, heavy-duty and powersports (i.e., specialty vehicles).

Light-Duty Vehicle Sector

The majority of our products are designed for light-duty vehicles, which are passenger cars and light-duty trucks. The light-duty vehicle sector accounted for projected industry sales of approximately $135.1 billion in 2023, according to information derived from the 2024 Auto Care Association Factbook. Two distinct groups of end-users buy replacement and upgrade vehicle parts for this sector: (i) individual consumers, who purchase parts to perform "do-it-yourself" repairs and upgrades on their own vehicles; and (ii) professional installers, which include individual vehicle repair shops, representing approximately 70% of the total aftermarket vehicle repair industry according to the Motor & Equipment Manufacturers Association, which generally service a variety of OEM vehicle makes and models and sell and install non-OEM aftermarket parts, and dealership service departments, which generally only service specific brands of OEM vehicles and sell and install those same OEM brand aftermarket parts. Individual consumers typically are supplied through retailers and the retail arms of warehouse distributors. Vehicle repair shops generally purchase parts through local independent parts wholesalers and national parts distributors. Automobile dealership service departments generally obtain parts through the distribution systems of vehicle manufacturers and specialized national and regional parts distributors.

Spending in the light-duty vehicle sector generally can be grouped into three categories: discretionary, maintenance, and repair. Discretionary, such as upgrade accessories and performance, tends to move in line with consumer discretionary spending. Maintenance is composed of products and services, such as oil and oil changes, and tends to be less correlated with discretionary spending. Repair consists mainly of replacement parts that fail over time and tends to be less cyclical as it is largely comprised of parts necessary for a vehicle to function properly or safely. The majority of our products fall into the repair category.

The increasing complexity and the number of different makes and models of light-duty vehicles have resulted in a significant increase in the number of products required to service the domestic and foreign automotive fleets. The requirement to include more products in inventory and the significant consolidation among distributors of automotive replacement parts have in turn resulted in larger distributors. See ITEM 1A,

“Risk Factors – Risks Related to Our Business – Our Industry, Operations and Competition” for information regarding the potential impacts of consolidation on our business.

Retailers and others who purchase light-duty aftermarket parts for resale often are constrained to a finite amount of space in which to display and stock products. Thus, the reputation for quality, customer service, and line profitability that a supplier provides typically are significant factors in a retailer’s or other reseller’s decision as to which product lines to carry in the limited space available. Further, because of the efficiencies achieved through the ability to order all or part of a complete line of products from one supplier (with possible volume discounts), as opposed to satisfying the same requirements through a variety of different sources, retailers and other resellers of light-duty aftermarket parts often seek to purchase products from fewer but stronger suppliers.

Heavy-Duty Vehicle Sector

The heavy-duty vehicle sector, which is focused on medium- and heavy-duty vehicles, accounted for projected industry sales of approximately $21.9 billion in 2023, according to information derived from the 2024 Auto Care Association Factbook.

The largest purchasers of aftermarket parts for this sector are original equipment, or OE, manufacturers, independent distributors, including organizations associated with large buying groups and other distributors, as well as independent component specialists and rebuilders, and auto parts stores. The service work performed on medium- and heavy-duty vehicles is generally completed by end-user businesses that utilize these vehicles in their operations, fleets, and independent garages and distributors, who buy parts from the purchasers above or in some instances directly from suppliers like us. The majority of our sales in the heavy-duty vehicle sector are related to replacement parts.

Specialty Vehicle Sector

The specialty vehicle sector, which is focused on powersport and off-road vehicles, accounted for projected industry sales of approximately $8.0 billion in 2023, according to information derived from the 2024 Auto Care Association Factbook.

The specialty vehicle sector generally consists of parts for powersports vehicles, such as UTVs and ATVs, for both functional and upgrade accessories as well as replacement parts. Functional and upgrade accessories include parts such as engine performance upgrades, lighting and electronics, storage and cargo, tires and wheels, cabs, roofs and windshields, and other cosmetic parts. Nondiscretionary repair parts consist of brake systems, engine systems, electronics, frame and body parts, and driveline and transmission parts and are critical given the significant wear and tear often placed on those parts during normal use. Given the critical nature of repair parts to ensure a vehicle to functions properly, purchases of those parts are generally nondiscretionary purchases. Approximately half of our sales of specialty vehicle parts constitute nondiscretionary repair parts.

This sector consists of direct-to-consumer and direct-to-dealer channels through both retail and e-commerce platforms. Key purchasing decisions of customers in this sector include ease of ordering, ease of installation, the availability of products, delivery times, and overall product quality.

Brands and Products

We market our products under the Dorman®, Dayton Parts® and SuperATV® names, along with several sub-brands, which identify products that address specific segments of the motor vehicle aftermarket industry.

Some of our most popular brands include:

DORMAN® – Reliable replacement automotive parts and components. A brand mechanics have trusted for more than 100 years.

DORMAN® OE FIX™ – Dorman products that are designed to be better repair solutions than the OE alternative. These parts are made to help save the service technician time and money, and increase reliability and serviceability.

HELP!® – Parts and components designed to help the automotive do-it-yourself customer, or DIYer, save time and money. A fixture in auto parts store aisles for decades.

Conduct-Tite® – Electrical tools, materials and accessories designed to help DIYers fix and customize vehicles. This brand includes the Builders Series line of premium wiring solutions.

Dayton Parts® – An extensive product offering of heavy-duty commercial vehicle repair solutions, from cab to trailer.

SuperATV® – UTV and ATV parts and accessories designed by riders for riders.

Keller Performance Products – High-quality ball joints for specialty vehicles.

Assault Industries – West Coast-style powersports products built for the cool factor and designed with an edge.

Gboost – Clutching products for specialty vehicles.

GDP – Premium quality transmission, portals, differentials and more for UTVs and ATVs.

We offer bumper-to-bumper aftermarket solutions covering everything from engine, undercar, steering and suspension, body, electronics and hardware. Our engine products include intake and exhaust manifolds, fans, thermostat housings, and throttle bodies. Our undercar products include fluid lines, fluid reservoirs, connectors, 4-wheel drive components and axles, drain plugs, and other engine, transmission and axle components. Our steering and suspension products include control arms, ball joints, tie-rod ends, brake hardware and hydraulics, wheel and axle hardware, suspension arms, knuckles, links, bushings, leaf springs, and other suspension, steering, and brake components. Our body products include door handles and hinges, window lift motors, window regulators, switches and handles, wiper components, lighting, electrical, and other interior and exterior vehicle body components, including windshields for UTVs. Our electronics products include new and remanufactured modules, clusters and sensors. Our hardware products include threaded bolts and auto body fasteners, automotive and home electrical wiring components, and other hardware assortments and merchandise.

We warrant our products against certain defects in material and workmanship when used as designed on the vehicle on which it was originally installed. We offer a limited lifetime warranty on most of our products in the light- and medium-duty parts categories, with more limited warranties for our heavy-duty and specialty vehicle products. Our standard warranties limit the end-user’s remedy to the repair or replacement of the part that is defective.

Product Development

We are committed to product development and innovation with a customer-first approach keeping owners and installers in mind. Our engineers and designers focus on solutions designed to help save repair technicians time, save vehicle owners money, and provide sought-after vehicle enhancements and differentiation.

We have dedicated teams devoted solely to ideation and innovation in support of our objective to develop new products, many of which are first to the aftermarket. Our teams of researchers, field analysts, and product specialists visit repair shop technicians and spend time with customers to listen to and understand their repair challenges and vehicle needs.

We categorize our product development opportunities across three different spectrums: (1) alternative parts - direct aftermarket replacements for factory parts, (2) upgraded, or what we refer to as "OE FIX" parts – parts with enhanced design, functionality or features based on identifying what made original parts problematic and developing new solutions that address the original failure modes, and (3) new parts - identifying parts that are not available from the OE or in the aftermarket that can enhance vehicle performance and user experience. Some of these opportunities are brand new to the aftermarket whereas others continue to expand our current portfolio offering. The following table represents the number of distinct parts we introduced for each of the last three fiscal years:


	Year Ended
	December 31, 2023	December 31, 2022	December 25, 2021
New to the aftermarket	1,791	1,762	990
Line extensions	4,315	3,667	3,325
Total distinct parts introduced	6,106	5,429	4,315

For the light-duty sector, in 2023 we introduced several innovative first-to-the-aftermarket repair solutions designed to fit a wide range of vehicles in the light-duty vehicle sector. New products included a patent-pending OE FIX engine coolant thermostat housing assembly, an OE FIX intake manifold, and an OE FIX liftgate handle trim kit. In addition, we continued to invest in our “Emerging Technology” solutions portfolio that helps support repair opportunities for complex automotive electronics components as well as hybrid and electric motor vehicle platforms. In 2023, we introduced several transmission control modules, variable geometry timing actuators (“VGTA”), and various other control modules and sensors. We also introduced several new control arms, suspension components, door lock actuators and handles specifically designed for electric vehicles.

In the heavy-duty sector, in 2023 we introduced numerous new products in categories such as air tanks, shock absorbers, and air springs. Additionally, we commercialized several new, aftermarket exclusive products across engine component, after-treatment, and the cab and body categories, further expanding repair options for both above and below chassis for Class 7 and Class 8 trucks.

In the specialty vehicles sector, in 2023 we released many first to market solutions for 2023 model vehicles along with a new line of glass windshields. We also completed a new turn signal kit line and focused on adding more break-fix solutions.

Sales and Marketing

We market our products to purchasers, many of whom in turn supply individual consumers and professional installers. Our products are available in our customers’ retail stores, on our website and our customers’ websites, and through dealers and warehouse distributors.

As of December 31, 2023, we had a sales and sales support team of over 300 people selling our products either directly to our customers or, with respect to certain select customers, indirectly through independent manufacturers’ representative agencies worldwide.

Our sales efforts are not directed merely at selling individual products, but more broadly towards selling our entire product portfolio. Our sales strategy includes increasing sales not only by securing new customers, but also by adding new product lines and expanding product selection within existing customers in an effort to make our customers a destination for our aftermarket products.

Among other things, we use digital advertising, social media, email, catalogs and brochures to describe and promote our products. Our websites include DormanProducts.com, DaytonParts.com and SuperATV.com. These sites are not and should not be considered part of this Form 10-K and are not incorporated by reference in this Form 10-K.

As of December 31, 2023, we serviced approximately 10,000 active accounts. During fiscal 2023, three customers each accounted for more than 10% of net sales and in the aggregate accounted for approximately 44% of net sales.

Manufacturing and Procurement

Most of our light-duty vehicle products are manufactured by third parties, as are the majority of our heavy-duty vehicle products. The remainder of our heavy-duty vehicle products are manufactured in our facilities in the United States. The majority of our specialty vehicle products are manufactured in our facilities in the United States and China. We engage third-party manufacturers around the world to develop and manufacture products according to our performance and design requirements, oftentimes using tooling that we own. In fiscal 2023, as a percentage of our total dollar volume of purchases, approximately 30% of our products were purchased from third-party suppliers throughout the United States and the balance of our purchases were from third-party suppliers outside of the United States. Approximately 50% of our products were purchased from third-party suppliers located in China and Taiwan in fiscal 2023. Our global supplier network provides access to a broad array of manufacturing capabilities and technologies while limiting our dependency on any single source of supply. While our supplier selection and sourcing programs will continue to leverage our strategic manufacturers for a substantial portion of our product portfolio, we also continue to qualify alternative sources available to provide additional support and capacity, if needed. We make a concerted effort to build and nurture strong, healthy relationships with our suppliers. In fiscal 2023, we purchased automotive products in substantial volumes from over 300 suppliers, and no single supplier accounted for more than 10% of our total product purchases. For more information on risks relating to our supply chain, see ITEM 1A. "Risk Factors - Risks Related to Our Business - Our Industry, Operations and Competition."

Packaging, Inventory and Shipping

Finished products acquired from third-party suppliers are received at one or more of our company or third-party-operated facilities in the United States and Canada for sorting and distribution to our customers, depending on the type of part. It is our practice to inspect samples of shipments based on supplier performance. If cleared, these shipments of finished parts are logged into our computerized production tracking systems and staged for packaging, if necessary.

We employ a variety of custom-designed packaging machines which include blister sealing, skin film sealing, clamshell sealing, bagging and boxing lines. Packaged product generally contains our label (or a private label), a part number, a universal packaging bar code suitable for electronic scanning, a description of the part and, if appropriate, installation instructions. Products are also sold in bulk to automotive parts manufacturers and packagers. Computerized tracking systems, mechanical counting devices and experienced workers combine

to help ensure that the proper variety and numbers of parts meet the correct packaging materials at the appropriate places and times to produce the required quantities of finished products.

Packaged inventory is either stocked in the warehouse portions of our facilities or in distribution centers maintained by our third-party logistics providers and is organized to facilitate the most efficient methods of retrieving product to fill customer orders. We strive to maintain a level of inventory to adequately meet current customer order demand with additional inventory to satisfy new customer orders and special programs.

We ship our products by contract carrier, common carrier or parcel service. Products are generally shipped to each customer's main warehouses for redistribution within its network or to dealers for further resale. In addition to utilizing our dealer networks, our specialty vehicle products that are ordered through SuperATV websites may be shipped directly to customers. In certain circumstances, at the request of a customer, we ship directly to that customer's warehouses, stores or other locations, either via smaller direct ship orders or consolidated store orders that are cross-docked.

Remanufacturing and Recycling Parts

Certain products we sell contain parts that can be recycled, or as more commonly referred to in our industry, remanufactured. We refer to the used product that is ultimately remanufactured as core. A used core is remanufactured and sold to the customer as a replacement for a unit on a vehicle. Customers and end-users that purchase a remanufactured replacement part will generally return the used core to us, which we then use in the remanufacturing process to make another finished good. Our core inventory consists of used cores purchased and held in our facilities, used cores that are in the process of being returned from our customers and end-users, and remanufactured cores held in finished goods inventory at our facilities. Our products that utilize cores include electronic control modules, hybrid batteries and complex mechatronics. We believe our remanufactured parts offer end-users an economical and safe way to maintain their cars on the road, while also reducing the impact on the environment.

Competition

The motor vehicle aftermarket industry is highly competitive. Competitive factors include price, product quality, breadth of product line, range of applications, customer service and the growth of e-commerce. Substantially all our products are subject to competition with similar products offered by other providers. Some of these competitors are divisions and subsidiaries of companies much larger than us who possess a longer history of operations and greater financial and other resources than we do. We also face competition from OE manufacturers who sell through their dealerships many of the same replacement parts that we sell, although these manufacturers generally sell parts only for vehicles they produce. Some of our current or former suppliers may compete with us by supplying directly to our customers. Further, some of our private label customers also compete with us. For more information on risks relating to our competition, see ITEM 1A, “Risk Factors – Risks Related to Our Business – Our Industry, Operations and Competition.”

Seasonality

Our business can be affected by weather conditions. Extremely hot or cold weather generally results in an increase in parts failure at an accelerated rate, which generally leads to an increase in our sales for the duration of the extreme weather event.

Patents, Trademarks and Other Intellectual Property

We own a number of patents important to our business, and we expect to continue to file patent applications to protect our research and development investments in new products. In fact, in 2023 we filed more patents than in the previous three years combined.

As of December 31, 2023, we held 107 patents and 72 pending patent applications worldwide. In addition, we hold numerous trademarks in the United States and other countries. We also have licenses to intellectual property for the manufacture, use and sale of certain of our products.

We obtain patent and other intellectual property rights used in connection with our business when practicable and appropriate. Historically, we have done so organically, through commercial relationships, or in connection with acquisitions.

For more information concerning the risks related to patents, trademarks and other intellectual property, see ITEM 1A, "Risk Factors – Risks Related to Our Business – Our Intellectual Property and Information Security.”

Human Capital Resources

General

As of December 31, 2023, we had 3,872 employees worldwide, substantially all of whom were employed full-time. Our employees are categorized by various functions. “Operations” consists of employees engaged in production, product distribution and inventory quality control. “Product Development” includes employees involved in product development and purchasing. “Quality and Engineering” consists of employees involved in internal and external quality management, manufacturing, engineering, design, and testing. “Sales” includes employees employed in sales and customer service. “Administration” includes executive officers and individuals employed in finance, legal, information technology, human resources and other functions supporting our business. The following table shows employees by function and region.


	December 31, 2023
	U.S.	Non-U.S.	Total
Operations	2,612	235	2,847
Product Development	251	1	252
Quality and Engineering	167	70	237
Sales	290	23	313
Administration	214	9	223
Total Employees	3,534	338	3,872

None of our global employees is covered by a collective bargaining agreement. We consider our relations with our employees to be generally good.

Health and Safety

We maintain a safety culture grounded on the premise of eliminating workplace incidents, risks and hazards. We have created and implemented processes to help eliminate safety events and reduce their frequency and severity. We also review and monitor our safety performance closely. We have adopted an environmental, health and safety policy outlining our commitment to policies and practices that support the health and safety of our employees, contractors and the community, and the protection of the environment in the communities where we operate. We also maintain a human rights policy for the organization outlining our commitment to operating with respect for human rights.

Diversity and Inclusion

We embrace the diversity of our employees, including their unique backgrounds, experiences, thoughts and talents. Employees are valued and appreciated for their distinct contributions to the growth and sustainability of our business. We strive to cultivate a culture and vision that supports and enhances our ability to recruit, develop and retain diverse talent at every level. Our Vice President of Talent Management and Belonging is responsible for leading our diversity and inclusion strategy. Among other things, we demonstrate our commitment to diversity and inclusion through our biennial “All In” initiative, a summit focused on inviting our employees to think and engage more with ideas such as diversity and inclusion to foster a collaborative environment.

We also embrace diversity on our Board of Directors, where 33% of our independent directors are female and 17% of our independent directors are ethnically diverse.

As part of our commitment to a culture of inclusion, our Contributor Resource Group, or CRG, Program broadens and enhances company-wide interaction opportunities for our employees. Our CRG Program is open to all and involves activities for employees whose background is the focus of each CRG and those who are supportive of the groups that have been formed. These company-wide networks build on and coordinate with local teams that are already active in our operations and include groups such as those focused on women, veterans, individuals desiring to learn more about diverse cultural backgrounds and employees who seek to learn more about career growth and leadership opportunities.

Talent and Development

Our talent strategy is focused on attracting the best talent, developing their skill sets and experiences and rewarding their performance. We focus significant attention on attracting and retaining talented and experienced individuals to manage and support our operations, and our leadership team routinely reviews employee turnover rates at various levels of the organization. Leadership also participates in a robust bi-annual talent review and succession planning process. In addition, leadership reviews employee engagement surveys to monitor employee morale and receive feedback on a variety of issues.

Compensation

We pay our employees competitively and offer a broad range of company-paid benefits, which we believe are competitive with others in our industry and in the geographies in which we compete for talent. We conduct an executive compensation benchmarking review annually to help ensure we are providing market-based compensation including base salary, and short-term and long-term incentives. We also participate in annual compensation surveys for all positions and strive to compensate our top talent and key roles competitively. Moreover, we believe our long-term incentives are structured in a manner to provide time-based vesting schedules that are retentive.

For information on risks relating to our human capital resources, see ITEM 1A, “Risk Factors – General Risk Factors – Losing the services of our executive officers or other highly qualified and experienced employees, or failing to attract and retain any of such officers or employees, could adversely affect our business.”

Available Information

Our Internet address is dormanproducts.com. The information on the website is not and should not be considered part of this Form 10-K and is not incorporated by reference in this Form 10-K. The website is, and is only intended to be, for reference purposes only. We make available free of charge on or through our website our Annual Report on Form 10-K, quarterly reports on Form 10-Q and current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), as soon as reasonably practicable after we electronically file such material with, or furnish it to, the Securities and Exchange Commission (the “SEC”). In addition, we will provide, at no cost, paper or electronic copies of our reports and other filings made with the SEC. Requests should be directed to: Attention: Secretary, Dorman Products, Inc., 3400 East Walnut Street, Colmar, Pennsylvania 18915.

ITEM 1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the following factors, which could materially affect our business, financial condition or future results. The risks described below are not the only risks we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially affect our business, financial condition or results of operations. The risks are listed below in no particular order.

Risks Related to Our Business

Our Industry, Operations and Competition

Our business is impacted by the age, condition and number of vehicles that need servicing and by improvements in the quality of new vehicle parts.

The size of the motor vehicle aftermarket industry depends, in part, upon the number of vehicles on the road, average vehicle age, change in total miles driven per year, new or modified environmental and vehicle safety regulations, including fuel-efficiency and emissions reduction standards, pricing of new and used vehicles and new vehicle quality and related warranties. We believe the motor vehicle aftermarket industry has been negatively impacted by the fact that the quality of certain motor vehicles and their component parts (and related warranties) has improved, thereby lengthening the repair cycle. Generally, if parts last longer, there will be less demand for our products, and the average useful life of motor vehicle parts has been steadily increasing in recent years due to innovations in products and technology. In addition, the introduction by original equipment manufacturers of increased warranty and maintenance initiatives has the potential to decrease the demand for our products. These factors could have a material adverse effect upon our business, financial condition and results of operations.

Our industry is highly competitive, and our success depends on our ability to compete with suppliers of motor vehicle aftermarket products, some of which may have substantially greater financial, marketing and other resources than we do.

The motor vehicle aftermarket industry is highly competitive, and our success depends on our ability to compete with domestic and international suppliers of aftermarket products. Due to the diversity of our product offering, we compete against a large cross-section of aftermarket companies and brands, including, but not limited to, Cardone Industries, Inc., Standard Motor Products, Inc., Tenneco, Inc., Bosch Auto Parts, First Brands Group, LLC, Gates Corporation, Continental Automotive Systems, Inc. (VDO), MevoTech LP, ACDelco (owned by General Motors Company), Motorcraft (owned by Ford Motor Company), Cummins Inc. (following its acquisition of Meritor, Inc.), Automann Inc., WARN Industries, Rocky Mountain ATV/MC and numerous category specific competitors. In addition, we face competition from original equipment manufacturers, which, through their dealers or dealerships, supply many of the same types of parts we sell. Further, some of our private label customers also compete with us.

Some of our competitors may have larger customer bases and significantly greater financial, technical and marketing resources than we do. These factors may allow our competitors to:

• respond more quickly than we can to new or emerging technologies and changes in customer requirements by devoting greater resources than we can to the development, promotion and sale of motor vehicle aftermarket products;

• engage in more extensive research and development;

• sell products at lower prices than we do;

• undertake more extensive marketing campaigns; and

• make more attractive offers to existing and potential customers and strategic partners.

We cannot assure you that our competitors or others in our industry will not (i) adopt fast follower strategies based on the Company's new product launches, (ii) develop products or services that are equal or superior to our products or that achieve greater market acceptance than our products, or (iii) expand their operations into product lines produced and sold by us. We also cannot assure you that additional entrants will not enter our industry or that companies in our industry will not consolidate. Any such competitive pressures could cause us to lose market share or could result in significant price decreases and could have a material adverse effect on our business, financial condition and results of operations.

The loss or decrease in sales among one of our top customers, or a material change in the terms on which they are willing to buy from us, could have a substantial negative impact on our sales and operating results.

A significant percentage of our sales has been, and is expected to be, concentrated among a relatively small number of customers. During fiscal 2023, three customers each accounted for more than 10% of net sales and in the aggregate accounted for approximately 44% of net sales. We anticipate that this concentration of sales among these customers will continue in the future. The loss of a significant customer, changes in customer buying behaviors or a substantial decrease in sales to such a customer could have a material adverse effect on

our sales and operating results. In addition, any consolidation among our key customers may further increase our customer concentration risk.

Also, while we may enter into long-term agreements with certain of our significant customers, those agreements generally do not contain purchase commitments, which instead are set forth in individual purchase orders submitted by customers based on their then-current or projected needs. We have in the past, and may in the future, lose customers or lose a particular product line of a customer due to the highly competitive conditions in the motor vehicle aftermarket industry, consolidation of customers and customer initiatives to buy direct from foreign suppliers or other business considerations. In addition, given the size and scale of some of our customers, there is a risk that they may establish and grow direct relationships with our suppliers and reduce their purchases or cease purchasing from us. A decision by any significant customer, whether motivated by competitive conditions, financial difficulties or otherwise, to materially decrease the amount of products purchased from us or the number of our product lines they choose to carry, to change their manner of doing business with us, or to stop doing business with us, could have a material adverse effect on our business, financial condition and results of operations.

Because our sales are concentrated, and the industry in which we operate is very competitive, we are under ongoing pressure from our customers to offer lower prices, extend payment terms, increase marketing and transportation allowances, provide enhanced rebates, discounts, rights of return and credits and offer other terms more favorable to these customers. These customer demands have put continued pressure on our operating margins and profitability and in the future could have a material adverse effect on our business, financial condition and results of operations.

There is substantial price competition in our industry, and our success and profitability will depend on our ability to maintain a competitive cost and price structure.

Given the substantial price competition in our industry, our success and profitability will depend on our ability to maintain a competitive cost and price structure. This is the result of a number of industry trends, including the consolidated purchasing power of large customers, the growth of e-commerce and actions taken by some of our competitors in an effort to attract new business, including efforts to enhance their online presence. Price reductions may be required to remain competitive in light of such industry trends, and such reductions may impact our sales and profit margins. Our future profitability will depend in part upon our ability to respond to changes in product and distribution channel mix, to continue to improve our manufacturing and distribution efficiencies, to increase prices to address increasing costs, to generate cost reductions, including reductions in the cost of components purchased from outside suppliers, and to maintain a cost structure that will enable us to offer competitive prices. Our inability to maintain a competitive cost structure or to pass through increases in costs to our customers could have a material adverse effect on our business, financial condition and results of operations.

Limited shelf space and the inability of our customers who resell our products to expand into new locations may adversely affect our ability to grow.

Because the amount of space available to a retailer and other resellers of our products is limited, our products compete with other motor vehicle aftermarket products, some of which are entirely dissimilar and otherwise non-competitive (such as car waxes and engine oil), for shelf and floor space. Moreover, our growth depends, in part, on the ability of those retailers and resellers to open and operate new locations in which our products may be sold. No assurance can be given that additional space will be available in their existing locations or that they will be able to expand into new locations that would support growth in the number of products and product lines that we offer. Any failure to maintain and/or grow our shelf or floor space, and any failure of our retailers and resellers to maintain and/or grow their number of locations, could have a material adverse effect on our business, financial condition and results of operations.

Customer consolidation in the motor vehicle aftermarket industry may lead to customer contract terms less favorable to us, which may negatively impact our financial results.

The motor vehicle aftermarket industry has been consolidating over the past several years. As a result of such consolidations, many of our non-end user customers have grown larger and therefore have more leverage

in the arms-length negotiations of agreements with us for the sale of our products. Such customers may require us to provide extended payment terms, issue customer credits and accept returns of slow-moving product to obtain new, or retain existing, business. Although we attempt to avoid or minimize such concessions, in some cases for those customers payment terms have been extended, enhanced credits have been issued and returns of product have exceeded historical levels. The product returns and customer credits primarily affect our net sales and profit levels while payment term extensions and additional factoring costs generally reduce operating cash flow and require additional capital to finance our business. We expect these trends to continue for the foreseeable future.

Our growth in the specialty vehicle category depends upon our continued ability to expand our product sales into specialty vehicles, including, but not limited to, those that require performance-defining products, and the expansion of the market for these vehicles.

With our acquisition of SuperATV, a portion of our sales are generated from providing aftermarket parts and accessories for specialty vehicles, such as UTVs and ATVs, that require performance-defining products. Our success depends, in part, on the growth of the market for such vehicles. Such market growth includes the creation of new classes of vehicles that can benefit from our products and our ability to create products for these vehicles. If these markets do not expand or if they contract due to economic factors, changes in consumer preferences or other reasons, or we are unsuccessful in creating new products for these markets or other competitors successfully enter into these markets, we may fail to achieve future growth or our sales could decrease, which could have a material adverse effect upon our business, financial condition and results of operations.

If we fail to maintain sufficient inventory to meet current customer demands, or if we fail to anticipate future changes in customer demands, our financial results could be adversely affected.

We must maintain sufficient in-stock inventory and anticipate future changes in customer demands in order to be successful. If we fail to do so, our financial results could be adversely affected. Fluctuations in demand may result from a number of factors, including, but not limited to, global economic conditions, global pandemics such as COVID-19, the age, condition and number of vehicles that need servicing, motor vehicle parts failure rates, loss of market share and improvements in product designs that result in enhanced quality and reliability of new vehicle parts. As a result of these and other factors, we have experienced and expect to continue to experience fluctuating levels of demand that require us to monitor, and, where appropriate, adjust our operations, including our inventory levels and staffing at our facilities. If we are unable to forecast accurately future reductions in demand, we may accumulate excess or obsolete inventory and be forced to reduce hours or lay off or furlough employees. Conversely, if we are unable to forecast accurately future increases in demand, we may have inventory shortfalls or inadequate staffing levels to meet demand, which may result in our inability to fill orders on a timely basis or at all and could result in penalties owed to our customers and the loss of net sales.

Our profitability may be materially adversely affected as a result of overstock inventory-related returns by our customers in excess of anticipated amounts.

In certain instances, we permit overstock returns of inventory that may be either new or non-defective or non-obsolete. To the extent our customer agreements permit overstock returns, those customers are generally limited to returning overstocked inventory according to a specified percentage of their annual purchases from us. We accrue for overstock returns as a percentage of net sales, after giving consideration to recent historical returns. While we believe that we make reasonable estimates for overstock returns in accordance with our revenue recognition policies, actual returns may differ from our estimates. To the extent that overstocked returns are materially in excess of our projections, our business, results of operations and financial condition may be materially adversely affected.

Our operations would be materially and adversely affected if our suppliers fail to perform or if we are unable to manage our supply chain effectively.

Because we purchase various types of raw materials, finished goods, equipment, and manufactured component parts from suppliers, we may be materially and adversely affected by the failure of those suppliers to

perform as expected. This non-performance may consist of delivery delays, or failures caused by production issues or delivery of non-conforming products. The risk of non-performance may also result from the insolvency or bankruptcy of one or more of our suppliers. Our suppliers’ ability to supply products to us is also subject to a number of risks, including, but not limited to, availability and cost of raw materials, political instability, military conflict, destruction of their facilities caused by natural and other disasters, work stoppages and health crises. For example, the motor vehicle industry previously experienced a shortage in the supply of semiconductors. We utilize semiconductors in our products and have at times encountered material shortages in semiconductor supply. If such a shortage were to occur again and if we were unable to source semiconductors on a timely basis or at all, we may be unable to produce some of our products, which could adversely affect our ability to develop new products and fill orders on existing products.

Furthermore, because certain products we sell contain parts that are or can be recycled and remanufactured -- parts more commonly referred to in our industry as “core” – our ability to sell those products may be materially and adversely affected if we are unable to obtain those core parts from our suppliers on favorable terms, if at all.

Our efforts to protect against and minimize these risks may not always be effective. If any of our key suppliers fails to meet our needs or if our relationships with any of our key suppliers are not maintained, it may not be possible to replace such supplier without disruptions in our operations. In addition, we may not be able to consolidate or diversify our supply chain as business needs dictate, and our operations may be adversely impacted as a result. For example, we may experience delays as new suppliers are qualified or as tooling is moved or replaced. Furthermore, the replacement of a key supplier or transitioning to a new supplier in a different geography may result in production delays or increased expenses, which could result in inventory shortages or lower profit margins and could have a material adverse effect on our business, financial condition and results of operations.

Our operating results are sensitive to the availability and cost of third-party transportation providers, which are important in the manufacture and transport of our products.

We depend upon third-party transportation providers, such as ocean freight, railroad and trucking carriers, for shipments to and from our suppliers and for delivery of our products to us and to our customers. Our access to third-party transportation providers is not guaranteed, and, even if we have access to transportation providers, we may be unable to transport our products at economically attractive rates in certain circumstances, particularly in cases of adverse market conditions or disruptions to transportation infrastructure. Fluctuations in demand for third-party transportation providers and other events impacting transportation capacity and costs, such as strikes, political events, international trade disputes, war, terrorism, natural disasters, adverse weather conditions, congestion, increases in fuel prices, public health issues, including the COVID-19 pandemic, and other events, may impact the availability of third-party transportation providers to ship our products or the cost to ship our products. For example, logistics costs and transit times for product from our suppliers were adversely impacted during 2023 by drought conditions in the Panama Canal and disruptive conflict around the Suez Canal, resulting in changes to our shipping routes and increased shipping costs. To the extent we enter into long-term agreements with transportation providers, our forecasts of expected capacity needed in future periods may be inaccurate as a result of unforeseen fluctuations in demand for these transportation services, which could result in us paying for capacity that is not needed or result in us having to purchase additional capacity on a spot-market basis. To the extent our transportation mix changes between contracted and market volume, driven by market conditions or other variables, we may observe impacts that create favorability or unfavorability in our end-to-end logistics cost structure. In addition, our business, financial position, results of operations or cash flows could be materially and adversely affected if we are unable to pass along increased transportation costs to our customers, or if third-party transportation capacity were to decline significantly or otherwise become unavailable.

Significant inflation could adversely affect our business and financial results.

Inflation can adversely affect us by increasing our operating costs, which could have an adverse impact on our business or financial results. For example, we experienced broad-based inflationary impacts during the year ended December 31, 2023 due primarily to global transportation and logistics constraints, which resulted in

significantly higher transportation costs, tariffs, material costs, and wage inflation from an increasingly competitive labor market. In a highly inflationary environment, we may attempt to offset inflationary pressures with cost-saving initiatives, price increases to customers or the use of alternative suppliers. Although we have implemented pass-through price increases to offset inflationary cost impacts, the price increases have often been implemented after we experienced higher costs, resulting in a lag effect to the full recovery of these costs. Furthermore, in general, pricing increases that we implemented to pass through the increased costs had no added profit dollars and consequently did not fully offset the impact that the increased costs had on our gross and operating margin percentages. Moreover, pricing actions such as these may have a negative impact on customers’ willingness to purchase our products. There can be no assurance that inflationary pressures will ease or that we will be successful in implementing pricing increases in the future to recover increased inflationary costs, and such inflationary pressures could have a material adverse effect on our business, financial condition, and results of operations.

Changes in U.S. trade policy, including the imposition of tariffs and the resulting consequences, could adversely affect our results of operations.

In fiscal 2023, approximately 70% of our products were purchased from suppliers in a variety of non-U.S. countries. The U.S. government’s trade policy with countries where we source our products may change based on a number of factors, including, but not limited to, political and economic factors. For instance, the U.S. government has imposed tariffs on certain foreign goods, including steel and certain commercial vehicle parts, which have resulted in increased costs for goods imported into the United States. In response to these tariffs, a number of U.S. trading partners have imposed retaliatory tariffs on a wide range of U.S. products. If we are unable to pass price increases on to our customer base or otherwise mitigate the costs, or if demand for our products decreases due to the higher cost, our results of operations could be materially adversely affected. In addition, further tariffs have been proposed by the United States and its trading partners and additional trade restrictions could be implemented on a broader range of products or raw materials. The resulting environment of retaliatory trade or other practices could have a material adverse effect on our business, financial condition, results of operations, customers, suppliers and the global economy.

Our business, results of operations and financial condition could be materially adversely affected by the effects of widespread public health pandemics, such as COVID-19, that are beyond our control.

Any outbreaks of contagious diseases, public health pandemics and other adverse public health developments in countries where we, our customers or our suppliers operate could have a material and adverse effect on our business, results of operations and financial condition. The COVID-19 pandemic adversely impacted businesses around the world, adversely affected supply chain logistics and contributed to increases in raw material, freight labor and other costs. Uncertain factors relating to pandemics such as COVID-19 include the duration, spread and severity of the pandemic, the efficacy and distribution of vaccines and treatments designed to combat the pandemic, the effects on our customers, vendors, suppliers and employees, and the actions, or perception of actions that may be taken, to contain or treat its impact, including declarations of states of emergency, workplace mandates, business closures, manufacturing restrictions and any prolonged period of travel, commercial and/or other similar restrictions and limitations.

Any such pandemic and the measures designed to contain its spread may negatively impact demand for our products, which could have a material and adverse effect on our business, results of operations and financial condition. Similarly, our suppliers may not have the materials, capacity, or capability to manufacture our products according to our schedule and specifications. If our suppliers’ operations are impacted, we may need to seek alternate suppliers, which may be more expensive, may not be available or may result in delays in shipments to us and subsequently to our customers, each of which would affect our results of operations. Further, in the event any members of our workforce, or those of our suppliers, become sick as a result of any pandemic or are otherwise compelled to quarantine, or refuse to comply with any related workplace mandates, we may experience shortages in labor and services that we require for our operations. The increased use of remote work environments and virtual platforms in response to any such pandemic may also increase our risk of cyber-attacks and data security breaches.

The duration of the disruption to our customers, our supply chain and our employees, and the related financial and operational impacts to us, as a result of any such pandemic, cannot be estimated at this time. Should any such disruption continue for an extended period, the impact could have a material adverse effect on our business, results of operations and financial condition.

Product Development, Acceptance and Quality

If we do not continue to develop new products and bring them to market, our business, financial condition and results of operations could be materially impacted.

Our historical growth and profitability have depended, in part, on the introduction of new parts to the motor vehicle aftermarket industry. In addition to growth through acquisitions, we invest in research and development to sustain or enhance our existing product portfolio. In certain circumstances, there may be a lengthy period between commencing these development initiatives and bringing new or improved products to market. In other instances, factors beyond our control may impact our ability to further our research and development activities. During any period of delay in research and development activities, technology advancements, customer demand and the markets for our products may move in directions that we had not anticipated. There is no guarantee that our new products, or enhancements to existing products, will achieve market acceptance or that the timing of market adoption will be as predicted. As a result, there is a significant possibility that some of our development decisions, including significant expenditures on acquisitions, research and development, or investments in technologies, will not meet our expectations, and that our investment in some projects will be unprofitable. There is also a possibility that we may miss a market opportunity because we failed to invest or invested too late in a technology, product or enhancement sought by our customers or the markets into which we sell. If we fail to make the right investments or fail to make them at the right time, competing solutions may be more attractive in the market. As a result, our competitive position may suffer, and our revenue and profitability could be adversely affected.

The development and production of any new products are often accompanied by design and production delays and related costs. While we expect and plan for such delays and related costs, we cannot predict with precision the time and expense required to overcome these initial problems so that the products comply with specifications. Moreover, as a supplier in the motor vehicle aftermarket industry, we face additional challenges in designing and producing replacement products as original equipment manufacturers may design parts that contain enhanced technology features or proprietary technologies that are required to interface with other vehicle systems in order to work properly. There is a risk that we may not be able to introduce or bring to full-scale production new products as quickly as we expected in our product introduction plans, which could have a material adverse effect on our business, financial condition, and results of operations.

We may be adversely impacted by changes in, or restrictions on access to, motor vehicle technology.

The motor vehicle aftermarket industry is experiencing a period of significant technological change as a result of the trends toward the integration of advanced electronics into traditional products and the increase in the number of vehicles powered by fuel cells or electricity. Software, firmware, and hardware increasingly are becoming functionally integrated with, and inseparable from, physical parts. While, traditionally, repair shops and vehicle owners could diagnose and repair their vehicles with mechanical adjustments, today they often need access to vehicles’ control units using laptops, complex diagnostic tools and software. Restrictions on access to testing and diagnostic tools, software, telematics, data and repair information imposed by the original vehicle manufacturers or by governmental regulations may force vehicle owners to rely on dealers to perform maintenance and repairs. This in turn could limit our ability to design, manufacture and sell new products and could have a material adverse effect on our business, financial condition and results of operations.

These trends have led to an increase in the significance of technology to our current and future products and the amount of capital we need to invest to develop these new technologies, as well as an increase in the amount of competition we face from technology-focused new market entrants. If we misjudge the amount of capital to invest or are otherwise unable to continue providing products that meet our customers’ needs in this environment of rapid technological change, our market competitiveness could be adversely affected, which could have a material adverse effect on our business, financial condition and results of operations.

Design and quality problems with our products could damage our reputation and adversely affect our business.

We have experienced, and in the future may experience, reliability, quality, or compatibility problems in products after their production and sale to customers. Product design and quality problems and any associated product recalls could result in damage to our reputation, loss of customers, a decrease in revenue, litigation, unexpected expenses, and a loss of market share. We have invested and will continue to invest in our engineering, design, manufacturing and quality infrastructure to help reduce these problems; however, there can be no assurance that we can successfully remedy these issues. To the extent we experience significant quality problems in the future, it could have a material adverse effect on our business, financial condition and results of operations.

Our Intellectual Property and Information Security

Cyber-attacks or other breaches of information technology security could adversely impact our business and operations.

Cyber-attacks or other breaches of network or information technology security may cause equipment failure, disruption to our operations or the loss or theft of sensitive data relating to our Company and our employees, customers, suppliers, and business partners, including intellectual property, proprietary business information, and other sensitive material. Such attacks, which include the use of malware, encryption, computer viruses and other means for disruption or unauthorized access, on companies have increased in frequency, scope and potential harm in recent years. In addition, the rapid evolution and increased adoption of artificial intelligence technologies may intensify our cybersecurity risks. We take preventive actions to reduce the risk of cyber incidents and protect our information technology and networks, including the data that is maintained within them. However, such preventative actions may be insufficient to repel a cyber-attack or other network breach in the future. Furthermore, because the techniques used to carry out cyber-attacks change frequently and in many instances are not recognized until after they are used against a target, we may be unable to anticipate these changes or implement adequate preventative measures. Moreover, we utilize third-party vendors that provide information technology services for various areas, including human resources functions (e.g., payroll), and parts of our operations rely upon third-party logistics providers that maintain their own information technology systems on which we rely. While we generally require these third parties to monitor and protect their information technology systems against cyber-attacks and other breaches, their efforts may not be effective. To the extent that any cyber-attack or other security breach of one of these third-party systems causes a disruption in a third-party’s operations or results in a loss or damage to our data, loss or theft of our intellectual property, or unauthorized disclosure of confidential information, including information regarding our customers and the ultimate purchasers of our products, it could disrupt our operations or cause significant damage to our reputation, affect our relationship with our customers, suppliers and employees, and lead to claims against us and ultimately harm our business. Moreover, intruders that gain access to our intellectual property and trade secrets may attempt to use that information to harm our business, by developing competing or counterfeit products. Additionally, we may be required to incur significant costs to protect against damage caused by these disruptions or security breaches in the future. Any such cyber-attacks and loss or theft of our intellectual property or unauthorized disclosure of confidential information could have a material adverse effect on our business, financial condition and results of operations.

We are dependent, in part, on our intellectual property. If we are not able to protect our proprietary rights or if those rights are invalidated or circumvented, our business may be adversely affected.

Our business is dependent, in part, on our ability to innovate, and, as a result, we rely on our intellectual property. We generally protect our intellectual property through patents, trademarks, copyrights, trade secrets, confidentiality and nondisclosure agreements, information security practices, and other measures to the extent our budget permits. There can be no assurance that patents will be issued from pending applications that we have filed or that our patents will be sufficient to protect our key technology from misappropriation or falling into the public domain, nor can assurances be made that any of our patents, patent applications, trademarks or our other intellectual property or proprietary rights will not be misappropriated, challenged, invalidated or circumvented. In addition, the level of protection of our proprietary technology varies by country and may be

uncertain in countries that do not have well-developed judicial systems or laws that adequately protect intellectual property rights. Patent litigation and other challenges to our patents and other proprietary rights are costly and unpredictable and may prevent us from gaining and/or maintaining market exclusivity for a product in a particular geographic area. Financial considerations may also preclude us from seeking patent protection in every country where infringement litigation could arise. Our inability to predict our intellectual property requirements in all geographies and affordability constraints may also impact our intellectual property protection investment decisions. If we are unable to adequately protect our proprietary rights, we may be at a disadvantage to others who do not incur the substantial time and expense we incur to create our products. Preventing unauthorized use or infringement of our intellectual property is inherently difficult. Moreover, it may be difficult or practically impossible to detect theft or unauthorized use of our intellectual property. Any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

Claims of intellectual property infringement by original equipment manufacturers and others could adversely affect our business and negatively impact our ability to develop new products.

From time to time in the ordinary course of our business, we are subject to claims that we are infringing the intellectual property rights of original equipment manufacturers, competitors, non-practicing entities, or others. Any such infringement claim could have a material adverse effect on our business, financial condition and results of operations due to an increase in legal expense, a time burden on employees involved in defense of such claim or slowed development and/or production of an accused product. This may be true whether they are with or without merit and whether they are covered by insurance or not. An adverse finding against us in these or similar intellectual property disputes may have a material adverse effect on our business, financial condition and results of operations if we are not able to successfully develop or license non-infringing alternatives. In addition, an unfavorable ruling in intellectual property litigation could subject us to significant liability, increased legal expense, and require us to cease developing or selling the affected products. Any significant restriction that impedes our ability to develop and commercialize our products could have a material adverse effect on our business, financial condition and results of operations.

Failure to maintain the value of our brands could have an adverse effect on our reputation, cause us to incur significant costs and negatively impact our business.

Our brands are an important component of our value proposition and serve to distinguish our products from those of our competitors. We believe that our success depends, in part, on maintaining and enhancing the value of our brands and executing our brand strategies, which are designed to drive demand for our products and, where we do not sell direct to end-users of our products, make us a valued business partner to our customers through the support of their marketing initiatives. A decline in the reputation of our brands as a result of events, such as deficiencies or defects in the design or manufacture of our products, from legal proceedings, product recalls or warranty claims resulting from such deficiencies or defects, or from failures to meet stakeholder expectations regarding environmental, social and governance matters may harm our reputation, reduce demand for our products and adversely affect our business. Moreover, our business may be adversely affected if we fail to develop adequate branding strategies following acquisitions of companies with their own established brands. In addition to the foregoing, certain of our customer agreements require us to supply them with private-label branded products. To the extent we use our own products to promote the brands of our customers over our own brands, our business may be adversely affected.

Risks Related to Our Capital Structure and Finances

Increasing our indebtedness could negatively affect our financial health.

We have a credit agreement with Bank of America, N.A., as administrative agent, under which we borrowed $500 million in the form of a term loan and through which we have a $600 million revolving credit facility. As of December 31, 2023, there was $484.4 million in outstanding borrowings under the term loan and $92.8 million in outstanding borrowings under the revolving portion of the credit agreement, and as of such date we had three outstanding letters of credit for $1.3 million in the aggregate.

Our outstanding indebtedness and any additional indebtedness we incur may have negative consequences on our business, including, among others: requiring us to use cash to pay the principal of and

interest on our indebtedness, thereby reducing the amount of cash available for other purposes; limiting our ability to obtain additional financing for working capital, capital expenditures, acquisitions, stock repurchases, and general corporate or other purposes; and limiting our flexibility in planning for, or reacting to, changes in our business, industries or the market.

Our ability to make payments of principal and interest on our indebtedness depends upon our future performance, which is subject to economic and political conditions, interest rates, industry cycles and financial, business and other factors, many of which are beyond our control. If we are unable to generate sufficient cash flow from operations to service our indebtedness, we may be required to, among other things: refinance or restructure all or a portion of our indebtedness; reduce or delay planned capital or operating expenditures; reduce, suspend or eliminate our stock repurchase program; or sell selected assets. Such measures might not be sufficient to enable us to service our indebtedness. In addition, any such refinancing, restructuring or sale of assets might not be available on economically favorable terms or at all, and if prevailing interest rates at the time of any such refinancing or restructuring are higher than our current rates, interest expense related to such refinancing or restructuring would increase. The occurrence of any of such events could have a material adverse effect on our business, financial condition and results of operations.

Our credit agreement contains covenants that restrict our operational flexibility. If we cannot comply with these covenants, we may be in default under our credit agreement.

Our credit agreement contains affirmative and negative covenants, including with regard to requirements that we maintain specified financial ratios, which limit and restrict our operations and may hamper our ability to engage in activities that may be in our long-term best interests. Events beyond our control could affect our ability to meet these and other covenants under the credit agreement. Moreover, our credit agreement is guaranteed by our material domestic subsidiaries and is supported by a security interest in substantially all of our and their personal property and assets, subject to certain exceptions.

Our failure to comply with our covenants and other obligations under the credit agreement may result in an event of default thereunder. A default, if not cured or waived, may permit acceleration of our indebtedness and provide our lenders with the ability to foreclose on the collateral securing their loans. If our indebtedness is accelerated, we cannot be certain that we will have sufficient funds available to pay down the indebtedness (together with accrued interest and fees), or that we will have the ability to refinance the accelerated indebtedness on terms favorable to us or at all. This could have a material adverse effect upon our business, financial condition and results of operations.

We are exposed to risks related to accounts receivable sales agreements.

We have entered into several customer-sponsored programs administered by unrelated financial institutions that permit us to sell certain accounts receivable at discounted rates to the financial institutions without recourse. These agreements permit us to recover on our accounts receivable sooner than if they were not in place and help reduce the risk of non-payment by customers. Certain of our customers, however, do not offer the ability to participate in such sponsored programs. If we do not enter into these agreements, our financial condition, results of operations and cash flows could be materially and adversely affected by delays or failures in collecting trade accounts receivables. In addition, the financial institutions with which we have these agreements may experience financial difficulties or may modify or terminate these agreements because of changes in our customers’ credit profiles, market conditions or otherwise. The modification, termination or other loss of these arrangements could have a material and adverse effect on our liquidity and our financial condition, results of operations and cash flows.

Interest rate increases may adversely affect our financial condition and results of operations.

Borrowings under our credit agreement are at variable rates of interest and expose us to interest rate risk. If interest rates increase, our debt service obligations on the variable rate indebtedness will increase even though the amount borrowed remains the same. As a result, our net income and cash flows, including cash available for servicing our indebtedness, will correspondingly decrease. A one-percentage-point increase in the interest rates on outstanding borrowings under our credit agreement would have increased our interest expense by approximately $6.8 million for the year ended December 31, 2023.

Our accounts receivable sales agreements are variable rate instruments impacted by reference interest rates, such as the Term Secured Overnight Financing Rate ("Term SOFR"), which are components of the discount rate applicable to each arrangement. A one-percentage-point increase in the discount rates on these arrangements would have increased our factoring costs by approximately $7.9 million for the year ended December 31, 2023. Rising interest rates increase the costs associated with these arrangements and result in us collecting less on our accounts receivable serviced through them. If interest rates increase such that the cost of these arrangements becomes more than the cost of servicing our receivables with existing debt, we may not be able to rely on such arrangements, which could have a material adverse effect on our business, financial condition and results of operations.

We extend credit to our customers, some of whom may be unable to pay in the future.

We regularly extend credit to our customers. A significant percentage of our accounts receivable have been, and are expected to continue to be, concentrated among a relatively small number of retailers, dealers and distributors in the United States. Our four largest customers accounted for 74% of total accounts receivable as of December 31, 2023 and 69% of total accounts receivable as of December 31, 2022. In the ordinary course of business, management monitors, among other things, credit terms and credit limits for these and other customers. In addition, from time to time, some of our customers request increases in their credit limits. Such requests may pose incremental risks to us, either by increasing the credit limit for a customer and accepting additional financial risk of non-payment or maintaining the credit limit and risking the customer redirecting business to another supplier offering better credit terms. If any of our customers were unable to pay, or if any of those customers redirect their business to other suppliers offering better credit terms, it could have a material adverse effect on our business, financial condition and results of operations.

Our business may be negatively impacted by our dependence on foreign suppliers and by foreign currency fluctuations.

In fiscal 2023, approximately 70% of our products were purchased from suppliers in a variety of non-U.S. countries, with the largest portion of our overseas purchases being made in China. As a result of the magnitude of our foreign sourcing, our business may be subject to various risks, including the following:

a.uncertainty caused by the elimination of import quotas and the possible imposition of additional quotas, bans on importing goods or materials from certain countries or regions or other retaliatory or punitive trade measures;

b.imposition of duties, tariffs, taxes and other charges on imports;

c.significant devaluation of the U.S. dollar against foreign currencies;

d.restrictions on the transfer of funds to or from foreign countries;

e.political instability, military conflict or terrorism involving the United States or any of the countries where our products are manufactured or sold, which could cause labor shortages, a delay in transportation or an increase in costs of transportation, labor, raw materials or finished product or otherwise disrupt our business operations; and

f.disease, epidemics and health-related concerns could result in closed factories, reduced workforces, scarcity of raw materials and scrutiny and embargoing of goods produced in infected areas.

In addition to the foregoing, the products we purchase from our foreign suppliers generally are purchased through purchase orders with the purchase price specified in U.S. dollars. Accordingly, we generally do not have exposure to fluctuations in the relationship between the U.S. dollar and various foreign currencies between the time of execution of the purchase order and payment for the product. To the extent that the U.S. dollar changes in value relative to those foreign currencies in the future, the prices charged by our suppliers under new purchase orders may change in equivalent U.S. dollars. For example, the Chinese yuan to U.S. dollar exchange rate has fluctuated over the past several years. Any future changes in the value of the Chinese yuan relative to the U.S. dollar may result in a change in the cost of products that we purchase from China in the future.

If these risks limit or prevent us from acquiring products from foreign suppliers or significantly increase the cost of our products, our operations could be seriously disrupted until alternative suppliers are found, which could have a material adverse effect upon our business, financial condition and results of operations.

Dorman’s Non-Executive Chairman and his family members own a significant portion of the Company.

As of February 22, 2024, Steven L. Berman, our Non-Executive Chairman, and his family members beneficially owned approximately 16% of the Company’s outstanding common stock. As such, Mr. Berman and his family members could influence matters requiring the approval of shareholders, including the election of the Board of Directors and the approval of significant transactions. Such concentration of ownership may have the effect of delaying, preventing or deterring a change in control of the Company, could deprive shareholders of an opportunity to receive a premium for their common stock as part of a sale of the Company and might ultimately affect the market price of our common stock. Moreover, sales of substantial amounts of the shares beneficially owned by Mr. Berman and his family members, including shares held in family trusts and foundations, or the perception that such sales could occur, may lower the prevailing market price of our common stock.

General Risk Factors

Unfavorable economic conditions may adversely affect our business.

Adverse changes in economic conditions, including inflation, recession, increases in fuel prices, decreased transportation capacity, rising interest rates, tariffs, labor shortages and unemployment levels, availability of consumer credit, taxation or instability in the financial markets or credit markets may either lower demand for our products or increase our operational costs, or both. Such conditions may also materially impact our customers, suppliers, dealers and other parties with whom we do business. Our revenue will be adversely affected if demand for our products declines. The impact of unfavorable economic conditions may also limit discretionary spending or otherwise impair the ability of our customers to pay for products they have purchased. As a result, reserves for doubtful accounts and write-offs of accounts receivables may increase and failure to collect a significant portion of amounts due on those receivables could have a material adverse effect on our business, financial condition and results of operations.

Our operations, revenues and operating results, and the operations of our third-party manufacturers, suppliers, warehouse and distribution providers, and customers, may be subject to quarter-over-quarter fluctuations and disruptions from events beyond our or their control.

Our operations, revenues and operating results, as well as the operations of our third-party manufacturers, suppliers, warehouse, distribution and logistics providers, and customers, may be subject to quarter-over-quarter fluctuations and disruptions from a variety of causes outside of our or their control, including work stoppages, market volatility, fuel and transportation prices, acts of war, terrorism, cyber incidents, pandemics, power outages, fires, earthquakes, flooding, changes in weather patterns, weather or seasonal fluctuations or other climate-based changes, including hurricanes or tornadoes, or other natural disasters. If a major disruption were to occur at our operations or the operations of our third-party manufacturers, suppliers, warehouse and distribution providers, or customers, it could result in harm to people or the natural environment, delays in shipments of products to customers or suspension of operations. In addition, such events could result in our inability to fill orders on a timely basis or at all and result in penalties owed to our customers and the loss of net sales. Any of the foregoing could have a material adverse effect on our business, financial condition and results of operations.

We rely extensively on computer systems to manage inventory, process transactions and timely provide products to our customers. These systems are subject to damage or interruption from power outages, telecommunications failures, computer viruses, security breaches, cyber-attacks or other catastrophic events. If these systems are damaged or fail to function properly, we may experience loss of critical data and interruptions or delays in our ability to manage inventories or process customer transactions. Such a disruption to these systems could negatively impact revenue and could have a material adverse effect on our business, financial condition and results of operations.

Unfavorable results of legal proceedings could materially adversely affect us.

We are subject to various legal proceedings and claims that arise out of the ordinary course of our business, such as those involving contracts, employment matters, competitive practices, and intellectual property infringement. In addition, if our products are defective or installed or used incorrectly by customers, bodily injury, property damage or other injury, including death, may result and could give rise to product liability claims against us. Legal proceedings and claims may be time-consuming and expensive to prosecute, defend or conduct. This may be true whether they are with or without merit and whether they are covered by insurance or not. They also may divert management’s attention and other resources; inhibit our ability to sell our products; result in adverse judgments for damages, injunctive relief, penalties and fines; and negatively affect our reputation, business, financial condition and results of operations. There can be no assurance regarding the outcome of current or future legal proceedings, claims or investigations.

The market price of our common stock may be volatile and could expose us to securities class action litigation and increased shareholder activism.

The stock market and the price of our common stock may be subject to wide fluctuations based upon general economic and market conditions. The market price for our common stock also may be affected by our ability to meet analysts’ expectations. Failure to meet such expectations, even slightly, could negatively affect the market price of our common stock. In addition, stock market volatility has had a significant effect on the market prices of securities issued by many companies for reasons unrelated to the operating performance of these companies. Downturns in the stock market may cause the price of our common stock to decline.

Following periods of volatility in the market price of a company’s securities, securities class action litigation has often been instituted against such companies. If similar litigation were instituted against us, it could result in substantial costs and a diversion of our management’s attention and resources, which could have a material adverse effect on our business, financial condition and results of operations. In addition, market price volatility may attract shareholder activism, which could take many forms, including potential proxy contests and public information campaigns. Shareholder activism could result in substantial costs to the Company, adversely affect our relationships with suppliers, customers, and regulators, and adversely impact our stock price.

Losing the services of our executive officers or other highly qualified and experienced employees or failing to attract and retain any of such officers or employees could adversely affect our business.

Our future success depends upon the continued contributions of our executive officers and senior management, many of whom have numerous years of experience and would be extremely difficult to replace. We must also attract and retain experienced and highly skilled engineering, sales and marketing, finance, logistics, information technology and operations personnel. Although we periodically conduct compensation benchmarking and surveys, competition for qualified personnel is often intense, our compensation programs may not be adequately designed, and we may not be successful in hiring and retaining these people. To the extent we experience increases in demand for labor, as a result of competition or otherwise, such increase in demand may drive higher wages for impacted roles and our ability to attract talent and maintain a competitive cost structure may be challenged. If we lose the services of our key employees, cannot attract and retain other qualified personnel or cannot maintain a competitive cost structure as a result of any of the foregoing, it could have a material adverse effect on our business, financial condition and results of operations.

Our growth may be impacted by acquisitions. We may not be able to identify suitable acquisition candidates, complete acquisitions or integrate acquisitions successfully.

Our future growth may depend in part on our ability to acquire and successfully integrate new businesses. We may not be able to identify suitable acquisition candidates, complete acquisitions, or integrate acquisitions, such as SuperATV, successfully. We may seek additional acquisition opportunities, both to further diversify our businesses and to penetrate or expand important product offerings, geographies or markets. There are no assurances, however, that we will be able to successfully identify suitable candidates, negotiate appropriate terms, obtain financing on acceptable terms, complete proposed acquisitions, successfully integrate acquired businesses, or expand into new geographies or markets. Once acquired, operations may not achieve

anticipated levels of revenues or profitability. Acquisitions involve risks, including difficulties in the integration of the operations, technologies, services and products of the acquired companies and the diversion of management's attention from other business concerns. Although our management will endeavor to evaluate the risks inherent in any particular transaction, there are no assurances that we will properly ascertain all such risks. Difficulties encountered with acquisitions could have a material adverse effect on our business, financial condition and results of operations.

Changes in tax laws or exposure to additional income tax liabilities could have a material adverse effect on our business, financial condition and results of operations.

We are subject to income taxes, as well as non-income-based taxes, at the federal, state and local levels. We are subject to tax audits in various jurisdictions. Tax authorities may disagree with certain positions we have taken and assess additional taxes. We regularly assess the likely outcomes of these audits in order to determine the appropriateness of our tax provisions. However, there can be no assurance that we will accurately predict the outcomes of these audits, and the actual outcomes of these audits could have a material adverse effect upon our business, financial condition and results of operations. Additionally, changes in tax laws or tax rulings could materially impact our effective tax rate.

Global climate change and related regulations could negatively affect our business.

The effects of climate change, such as extreme weather conditions, create financial risks to our business. For example, the demand for our products may be affected by unseasonable weather conditions. The effects of climate change could also disrupt our operations by impacting the availability and cost of materials needed for manufacturing and could increase insurance and other operating costs. We could also face indirect financial risks passed through the supply chain and disruptions that could result in increased prices for our products and the resources needed to produce them.

Climate change is continuing to receive ever-increasing attention worldwide. Many scientists, legislators and others attribute climate change to increased levels of greenhouse gases, including carbon dioxide, which could lead to additional legislative and regulatory efforts to limit greenhouse gas emissions. New international, federal or state legislative or regulatory restrictions or standards adopted regarding emissions of carbon dioxide that may be imposed on motor vehicles and related fuels could adversely affect demand for motor vehicles, annual miles driven or the products we sell and could lead to or require changes in motor vehicle technology or increased costs. For example, California recently enacted a climate focused disclosure law and the SEC has proposed climate change related regulations. We will be required to spend significant time and resources to comply with these types of new laws and regulations. Compliance with any new or more stringent laws, regulations or standards, or stricter interpretations of existing laws, regulations or standards, could require us to incur increased capital expenditures. While we have been committed to continuous improvements to our product portfolio to meet and exceed anticipated laws, regulations and standards, there can be no assurance that our actions will be successful, that our products will be accepted by the market, that proposed regulation or deregulation will not have a negative competitive impact or that economic returns will reflect our investments in new product development.

We could be adversely affected by violations of the U.S. Foreign Corrupt Practices Act and similar anti-bribery laws around the world.

The U.S. Foreign Corrupt Practices Act (the "FCPA") and similar anti-bribery laws in other jurisdictions generally prohibit companies and their intermediaries from making improper payments to government officials or other persons for the purpose of obtaining or retaining business. Recent years have seen a substantial increase in anti-bribery law enforcement activity, with more frequent and aggressive investigations and enforcement proceedings by both U.S. and non-U.S. regulators, and increases in criminal and civil proceedings brought against companies and individuals. Our policies mandate compliance with these anti-bribery laws. We operate in parts of the world that are recognized as having governmental and commercial corruption and local customs and practices that can be inconsistent with anti-bribery laws. We cannot assure you that our internal control policies and procedures will always protect us from reckless or criminal acts committed by our employees or third-party intermediaries. In the event that we believe or have reason to believe that our employees or agents have or may have violated applicable anti-corruption laws, or if we are subject to

allegations of any such violations, we may be required to investigate or have outside counsel investigate the relevant facts and circumstances, which can be expensive and require significant time and attention from senior management. Violations of these laws may result in criminal or civil sanctions, which could disrupt our business and result in a material adverse effect on our reputation, business, financial condition and results of operations. In addition, we could be subject to commercial impacts such as lost revenue from customers who decline to do business with us as a result of such compliance matters, or we could be subject to lawsuits brought by private litigants, each of which could have a material adverse effect on our reputation, business, financial condition, and results of operations.

Our products are subject to import and export controls and economic sanctions laws and regulations in various jurisdictions, and violations could adversely affect us.

Import and export controls and economic sanctions laws and regulations include restrictions and prohibitions on the sale or supply of certain products and on our transfer of parts, components, and related technical information and know-how to certain countries, regions, governments, persons and entities. Various countries regulate the importation of certain products through import permitting and licensing requirements and have enacted laws that could limit our ability to distribute our products. The exportation, re-exportation, transfers within foreign countries and importation of our products, including by our suppliers and vendors, must comply with these laws and regulations, and any violations may result in reputational harm, government investigations and penalties, and denial or curtailment of importing or exporting activities. Complying with export control and sanctions laws for a particular sale may be time-consuming, may increase our costs, and may result in the delay or loss of sales opportunities. If we are found to be in violation of U.S. sanctions or export control laws, or similar laws in other jurisdictions, we and the individuals working for us could incur substantial fines and penalties. Changes in export, sanctions or import laws or regulations may delay the introduction and sale of our products in the U.S. and international markets, require us to spend resources to seek necessary government authorizations or to develop different versions of our products, or, in some cases, prevent the export or import of our products to certain countries, regions, governments, persons or entities, which could adversely affect our business, financial condition and operating results.

ITEM 1B. Unresolved Staff Comments.

None

ITEM 1C. Cybersecurity

Risk Assessment

We depend on a variety of information systems and technologies (including cloud technologies) (collectively, “IT Systems”) to manage our business. We rely on these IT Systems to provide information for substantially all of our business operations, including supply chain, order processing, e-commerce, human resources, legal, compliance, marketing, finance, and accounting. Our core IT Systems consist mostly of purchased and licensed software programs that integrate together and with our internally developed solutions. As part of our overall enterprise risk management program, we monitor and assess the risks posed by cybersecurity threats to those internal and external systems and solutions and maintain an information security program designed to mitigate such risks.

Our information security program includes development, implementation, and improvement of policies and procedures to safeguard information to help ensure availability of critical data and systems. To the extent we utilize third-party vendors to provide information technology services for various areas, including human resources functions (e.g., payroll), we generally require these vendors to monitor and protect their information technology systems against cyber-attacks and other breaches. The Company's technology environment is managed by an experienced team of professionals who follow an extensive set of policies and procedures related to data security. Our program further includes review and assessment by external, independent third parties, who assess and report on our internal incident response preparedness and help identify areas for continued focus and improvement. With the assistance of one such reputable third party, the Company conducts biannual maturity assessments of its IT Systems against the National Institute of Standards of Technology (NIST) Cybersecurity Framework. We also carry insurance that provides protection against the risks from

cybersecurity threats. To our knowledge, during fiscal 2023, there were no material cybersecurity incidents or threats that materially affected or are reasonably likely to materially affect the Company’s business strategy, results of operations, or financial condition.

Governance

Pursuant to its charter, the Audit Committee of the Board of Directors (the “Board”) has oversight of the Company's information security program, including, but not limited to, risks regarding cybersecurity threats. In particular, the Audit Committee reviews with management the Company’s key IT Systems and evaluates the adequacy of the Company’s information security program, compliance, and controls.

The Company's Senior Vice President and Chief Information Officer (“CIO”), who reports to the Company’s Chief Executive Officer, is responsible for the operation of the Company’s information security program. Our CIO is an IT veteran with over 25 years of experience in building and maturing cyber programs for large public companies. The CIO is supported by an internal team of certified security analysts that work in conjunction with leading security operations managed service providers to manage detection and response.

On at least an annual basis, a cyber risk report that highlights program governance, risks, and opportunities is provided to the Audit Committee and the full Board.

The Company maintains a Security Committee, which is led by the CIO and is comprised of individuals from the Company’s IT department – including dedicated security team members with various security certifications. The Security Committee regularly reviews information security program governance and key performance indicators. These reviews typically include the number of events, number of investigations, mean response time, and cyber trends. The Security Committee oversees the Company’s security roadmap and ensures monitoring of information security policies and procedures covering areas such as back-up and retention, acceptable use, disaster recovery, incident management, and passwords.

The success of the Company’s information security program relies not only on ownership by the CIO’s organization but also an active and collaborative relationship within the business. The Company requires all employees to complete cyber training annually. For fiscal 2023, the Company maintained a security learning management system with phishing simulations distributed regularly to enhance cyber resiliency. Additionally, the Company leverages communications, contests, policies, videos, and visuals to continuously raise awareness among employees.

ITEM 2. Properties.

Facilities

As of December 31, 2023, we had 41 warehouse and office facilities located throughout the United States, Canada, China, Taiwan and India. Five of these facilities are owned and the remainder are leased. Our principal facilities are as follows:

Location

Description

Size

Ownership

Portland, TN

Warehouse and office

997,310

sq. ft.

Leased

Whiteland, IN

Warehouse and office

827,180

sq. ft.

Leased

Warsaw, KY

Warehouse and office

710,500

sq. ft.

Owned

Colmar, PA

Corporate headquarters
Warehouse and office

342,000

sq. ft.

Leased

(1)

Madison, IN

Warehouse and office

333,000

sq. ft.

Leased

(3)

Shiremanstown, PA

Warehouse and office

318,872

sq. ft.

Leased

Durant, OK

Warehouse and office

208,000

sq. ft.

Owned

Lewisberry, PA

Warehouse and office

170,500

sq. ft.

Leased

(2)

Madison, IN

Warehouse

145,000

sq. ft.

Leased

(3)

Las Vegas, NV

Warehouse and office

122,071

sq. ft.

Leased

Jiangsu Province, China

Warehouse and office

105,911

sq. ft.

Leased

Harrisburg, PA

Warehouse and office

101,750

sq. ft.

Leased

Harrisburg, PA

Manufacturing Facility

101,132

sq. ft.

Owned

Lewisville, TX

Warehouse and office

101,029

sq. ft.

Leased

Franklin, KY

Warehouse

100,000

sq. ft.

Leased

Louisiana, MO

Warehouse and office

90,000

sq. ft.

Owned

Warsaw, KY

Warehouse

80,000

sq. ft.

Leased

Shreveport, LA

Warehouse and office

65,000

sq. ft.

Leased

(3)

Reno, NV

Warehouse and office

54,354

sq. ft.

Leased

Kankakee, IL

Manufacturing Facility

53,574

sq. ft.

Owned

Sanford, NC

Warehouse and office

52,500

sq. ft.

Leased

Jacksonville, FL

Warehouse and office

52,080

sq. ft.

Leased

(1)Prior to December 1, 2023, we leased the Colmar facility from a partnership of which our Non-Executive Chairman, Steven L. Berman, and certain of his family members are owners. The building was sold by the partnership to a third party effective December 1, 2023. Under this lease agreement, we paid rent of $2.9 million in fiscal 2023. The rent payment will be adjusted on January 1 of each year to reflect annual changes in the Consumer Price Index for All Urban Consumers - U.S. City Average, All Items. This lease was renewed during December 2022, effective as of January 1, 2023, and will expire on December 31, 2027.

(2)We lease one of our two Lewisberry facilities (consisting of approximately 142,500 square feet) from a limited liability company of which our Non-Executive Chairman, Steven L. Berman, and certain of his family members are owners. Under this lease agreement, we paid rent of $0.7 million in fiscal 2023. The rent payable will be increased by 3% on July 1st of each year. This lease commenced in September 2020 and will expire on December 31, 2027.

(3)We lease two facilities in Madison and one facility in Shreveport (consisting of an aggregate of approximately 543,000 square feet) from limited liability companies in which Ms. Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicles, and members of her family are owners. Under the three lease agreements, we paid aggregate rent of $2.6 million in fiscal 2023. The rent payable under each lease will increase by 2% on October 4th of each year. Each of the three leases commenced in October 2022 in connection with the SuperATV acquisition and will expire on October 4, 2027.

ITEM 3. Legal Proceedings.

The information set forth under the heading “Other Contingencies” appearing in Note 11, “Commitments and Contingencies,” to the Notes to Consolidated Financial Statements contained in PART II, ITEM 8 of this report is incorporated herein by reference.

ITEM 4. Mine Safety Disclosures.

Not Applicable

ITEM 4.1. Information about Our Executive Officers.

The following table sets forth certain information with respect to our executive officers as of February 28, 2024:

Name

Age

Position with the Company

Kevin M. Olsen

President and Chief Executive Officer

Brian J. Borradaile

Senior Vice President, Strategy and Corporate Development

Joseph P. Braun

Senior Vice President, General Counsel and Secretary

Jeffrey L. Darby

Senior Vice President, Sales and Marketing

David M. Hession

Senior Vice President, Chief Financial Officer and Treasurer

Lindsay Hunt

President and Chief Executive Officer, Specialty Vehicles

Scott D. Leff

Senior Vice President, Chief Human Resources Officer

Donna M. Long

Senior Vice President, Chief Information Officer

Eric B. Luftig

Senior Vice President, Product

John McKnight

President, Heavy Duty

Kevin M. Olsen joined the Company in July 2016 as Senior Vice President and Chief Financial Officer. He became Executive Vice President, Chief Financial Officer in June 2017, President and Chief Operating Officer in August 2018 and President and Chief Executive Officer in January 2019. Prior to joining the Company, Mr. Olsen was Chief Financial Officer of Colfax Fluid Handling, a division of Colfax Corporation, a diversified global manufacturing and engineering company that provides gas and fluid-handling and fabrication technology products and services to commercial and governmental customers around the world, from January 2013 through June 2016. Prior to joining Colfax, he served in progressively responsible management roles at the Forged Products Aero Turbine Division of Precision Castparts Corp, Crane Energy Flow Solutions, a division of Crane Co., Netshape Technologies, Inc., and Danaher Corporation. Prior thereto, Mr. Olsen performed public accounting work at PricewaterhouseCoopers LLP. Mr. Olsen is also a director of Twin Disc, Inc., a publicly traded international manufacturer and worldwide distributor of heavy-duty off-highway and marine power transmission equipment and related products.

Brian J. Borradaile was appointed to serve as the Company’s Senior Vice President, Strategy and Corporate Development in February 2023. Mr. Borradaile previously served as Vice President, Corporate Development when he joined the Company in December 2017. Prior to that time, Mr. Borradaile worked in the automotive, technology, and industrial manufacturing industries, including positions at Aptiv Plc (formerly Delphi Automotive Plc), a leading global technology and mobility architecture company primarily serving the automotive sector, TE Connectivity Ltd., a publicly traded global industrial technology leader, and various private equity companies.

Joseph P. Braun joined the Company in April 2019 as Senior Vice President and General Counsel, and he was appointed Corporate Secretary in May 2019. Prior to joining the Company, Mr. Braun served as Chief Legal Officer and Corporate Secretary of Avantor, Inc., a leading global provider of products and services to customers in the life sciences and advanced technologies and applied materials industries. Prior to joining Avantor, he worked at Tyco International plc (now known as Johnson Controls International plc), a leading global provider of security, fire detection and suppression, and life safety products and services, where he served in positions of increasing responsibility, including, most recently, as Vice President, Mergers &

Acquisitions. Mr. Braun began his legal career in private practice at various law firms, where he advised public and private companies on mergers and acquisitions and securities and corporate governance matters.

Jeffrey L. Darby joined the Company in November 1998 as a National Account Manager. He became Senior Vice President, Sales and Marketing in February 2011. He previously held the positions of Group Vice President from 2008 to 2010 and Vice President of Sales – Traditional and Key Accounts from 2006 to 2008. Prior to joining the Company, Mr. Darby worked for Federal-Mogul Corporation/Moog Automotive, an automotive parts supplier, beginning in 1990 and held positions in sales and marketing management.

David M. Hession joined the Company in February 2019 and was appointed to serve as the Company’s Senior Vice President and Chief Financial Officer effective March 2019. Mr. Hession was also appointed Treasurer in May 2019. Mr. Hession was Vice President, Chief Financial Officer of Johnsonville, LLC, a privately held manufacturer of sausage and other protein products, from May 2013 to January 2019. Prior to that time, Mr. Hession worked at McCormick & Company, Inc., a global leader in the manufacture, marketing and distribution of spices, seasonings and flavors to the entire food industry, where he served in various positions of increasing responsibility including, most recently, as Vice President Finance & Administration. Mr. Hession also previously held positions with Tradeout, Inc., a business-to-business Internet exchange for surplus inventory and fixed assets, and Xylum Corporation, a development stage medical device manufacturer, and he performed management consulting work for Ernst & Young, LLP and Peterson Consulting LP.

Lindsay B. Hunt joined the Company in October 2022 as President and Chief Executive Officer, Specialty Vehicles, in connection with the Company’s acquisition of Super ATV, LLC, a leading supplier to the powersports aftermarket (“SuperATV”). Ms. Hunt most recently served as President and Chief Executive Officer of SuperATV, a role that she held beginning in April 2021. Prior to that time, Ms. Hunt served SuperATV in roles of increasing responsibility, including leadership positions in sales and marketing, new product development and operations. Ms. Hunt joined SuperATV in 2009.

Scott D. Leff joined the Company in April 2019 as Senior Vice President, Chief Human Resources Officer. Prior to joining Dorman, Mr. Leff held a variety of global divisional human resources roles at HP Inc. and its subsequent spin‐off, Hewlett‐Packard Enterprise Company, both multinational information technology companies. He served as Chief Human Resources Officer of Hewlett‐Packard Financial Services from March 2010 to March 2018 and Vice President of HPE Pointnext from March 2018 to April 2019. Prior to that, Mr. Leff held chief human resources officer roles and divisional human resource and employee relations roles within various publicly and privately held companies. Mr. Leff began his career as a lawyer in a New Jersey County Prosecutor’s office and a New Jersey-based law firm.

Donna M. Long joined the Company in April 2015 as Senior Vice President, Chief Information Officer. Prior to joining the Company, she served as Chief Information Officer of Veritiv Corporation, a business-to-business provider of packaging, publishing, and hygiene products (“Veritiv”), from July 2014 to April 2015. Veritiv was formed as a result of the merger of Unisource Worldwide, Inc., a distributor of printing paper, packaging and supplies (“Unisource”) with xpedx, a division of International Paper Co. Prior to July 2014, Ms. Long held roles of increasing responsibility within Unisource, including as its Chief Information Officer, and she previously was a Manager at Accenture plc, a professional services company.

Eric B. Luftig joined the Company in December 2021 as Senior Vice President, Product. Previously, he was the founder and Managing Partner of EBL Consulting LLC, a provider of executive management and leadership consulting services, from June 2020 to December 2021. From October 2009 to June 2020, Mr. Luftig served as Vice President and Marketing Officer for Victaulic Company, a leading producer of mechanical pipe joining solutions. Prior to that, Mr. Luftig served in various engineering, sales and marketing roles for publicly and privately held companies, including General Electric, a leader in the power, renewable energy, aviation and healthcare industries, and Nordson Corporation, a designer and manufacturer of dispensing equipment for consumer and industrial adhesives, sealants and coatings.

John McKnight joined the Company in November 2019 as Senior Vice President, Operations and on March 10, 2023, Mr. McKnight was appointed President, Heavy Duty. Prior to joining the Company, he served as Chief Operating Officer of Morgan Corporation, a leading producer of truck and van bodies in North America, from January 2019 to September 2019, and as Chief Operating Officer of Consolidated Glass

Holdings, Inc., a holding company for architectural, security, and custom glass and metal fabrication businesses, from September 2017 to July 2018. Prior to September 2017, Mr. McKnight held various roles with the Colfax Corporation, a diversified global manufacturing and engineering company ﴾“Colfax”﴿, including most recently as Executive Director of its Howden Industrial Fans division. Before Colfax, he held various leadership roles with Danaher, a designer, manufacturer, and marketer of professional, medical, industrial, and commercial products and services.

PART II

ITEM 5. Market for Registrant's Common Equity, Related Shareholder Matters and Issuer Purchases of Equity Securities.

Our shares of common stock are traded publicly on the NASDAQ Global Select Market under the ticker symbol “DORM.” At February 22, 2024, there were 318 holders of record of our common stock.

We do not anticipate paying cash dividends on our common stock in the foreseeable future. Any payment of dividends in the future will be at the discretion of our board of directors and will depend upon, among other things, our earnings, financial condition, capital requirements, level of indebtedness, provisions of our existing credit agreement and other factors that our board of directors deems relevant.

For information regarding our equity compensation plans, see PART III ITEM 12, “Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters.”

Stock Performance Graph. Below is a line graph comparing the cumulative total shareholder return for our common stock with the cumulative total shareholder return for the NASDAQ US Benchmark Auto Parts index and the NASDAQ Composite Market Index for the period from December 29, 2018 to December 31, 2023.

The NASDAQ US Benchmark Auto Parts index is comprised of 24 public companies and the information was furnished by Zacks Investment Research, Inc. The NASDAQ Composite Market Index is comprised of more than 3,400 public companies and the information was furnished by Zacks Investment Research, Inc. The graph assumes $100 invested on December 29, 2018 in our common stock and each of the indices, and that dividends were reinvested when and as paid. In calculating the cumulative total shareholder returns, the companies included are weighted according to the stock market capitalization of such companies. The stock price performance shown in the graph is not necessarily indicative of future price performance.

The performance graph and the information set forth therein shall not be deemed to be filed for purposes of Section 18 of the Exchange Act and shall not be deemed to be incorporated by reference in any filing made by us with the U.S. Securities and Exchange Commission, except as shall be expressly set forth by specific reference in such a filing.

Stock Repurchases

During the three months ended December 31, 2023, we purchased shares of our common stock as follows:


Period	Total Number of Shares Purchased	Average Price Paid per Share		Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs (3)	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs (3)
October 1, 2023 through October 28, 2023	—	$	—	—	$	227,989,218
October 29, 2023 through November 25, 2023 (1)	48,181	$	70.59	47,200	$	224,657,203
November 26, 2023 through December 31, 2023 (2)	155,600	$	77.76	154,432	$	212,655,962
Total	203,781			201,632	$	212,655,962

(1)Includes 148 shares withheld from participants for income tax withholding purposes in connection with the vesting of restricted stock awards (“RSAs”) during the period. The RSAs were granted to participants in prior periods pursuant to our 2018 Stock Option and Stock Incentive Plan (the “2018 Plan”). Also includes 833 shares purchased from the Dorman Products, Inc. 401(k) Plan and Trust (as described in Note 12, "Capital Stock", to the Notes to Consolidated Financial Statements included in this Annual Report on Form 10-K, the “401(k) Plan”).

(2)Includes 73 shares withheld from participants for income tax withholding purposes in connection with the vesting of RSAs during the period. The RSAs were granted to participants in prior periods pursuant to the 2018 Plan. Also includes 1,095 shares purchased from the 401(k) Plan.

(3)On December 12, 2013 we announced that our Board of Directors authorized a share repurchase program, authorizing the repurchase of up to $10 million of our outstanding common stock by the end of 2014. Through several actions taken since that time, including most recently in July 2022, our Board of Directors has expanded the program to $600 million and extended the program through December 31, 2024. Under this program, share repurchases may be made from time to time depending on market conditions, share price, share availability and other factors at our discretion.

ITEM 6. [Reserved]

ITEM 7. Management's Discussion and Analysis of Financial Condition and Results of Operations.

“Management’s Discussion and Analysis of Financial Condition and Results of Operations” should be read in conjunction with the Consolidated Financial Statements and related notes thereto included in PART II, ITEM 8 of this Annual Report on Form 10-K. The matters discussed in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contain certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve significant risks and uncertainties. See the “Statement Regarding Forward-Looking Statements” above and PART I, ITEM 1A, “Risk Factors” in this Annual Report on Form 10-K for additional information regarding forward-looking statements and the factors that could cause actual results to differ materially from those anticipated in the forward-looking statements. In ITEM 7, we discuss fiscal 2023 and 2022 results and comparisons of fiscal 2023 results to fiscal 2022 results. Discussions of fiscal 2021 results and comparisons of fiscal 2021 results to fiscal 2022 results can be found in “Management’s Discussion and Analysis of Financial Condition and Results of Operations” in PART II, ITEM 7 of the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022.

Overview

As of December 31, 2023, we marketed approximately 133,000 distinct parts compared to approximately 129,000 as of December 31, 2022, many of which we designed and engineered. This number excludes private label stock keeping units and other variations in how we market, package and distribute our products, includes distinct parts of acquired companies and reflects distinct parts that have been discontinued at the end of their lifecycle. Our products are sold under our various brand names, under our customers’ private label brands or in bulk. We are one of the leading aftermarket suppliers of parts that were traditionally available to consumers only from OE manufacturers or salvage yards. These parts include, among other parts, leaf springs, intake manifolds, exhaust manifolds, window regulators, radiator fan assemblies, tire pressure monitor sensors, exhaust gas recirculation (EGR) coolers, UTV windshields, and complex electronics modules.

We generate most of our net sales from customers in North America, primarily in the United States. Our products are sold primarily through aftermarket retailers, including through their online platforms; dealers; national, regional and local warehouse distributors and specialty markets; and salvage yards. We also distribute aftermarket parts outside the United States, with sales primarily into Canada and Mexico, and to a lesser extent, Europe, the Middle East and Australia.

We may experience significant fluctuations from quarter to quarter in our results of operations due to the timing of orders placed by our customers as well as our ability and the ability of our suppliers to deliver products ordered by our customers. The introduction of new products and product lines to customers, as well as business acquisitions, may also cause significant fluctuations from quarter to quarter.

Prior to October 4, 2022, we operated on a 52-53-week period ending on the last Saturday of the calendar year. Effective October 4, 2022, our Board of Directors approved a change in Dorman’s fiscal year end from the last Saturday in December of each year to December 31 of each year. This change resulted in future years ending on December 31, consistent with fiscal 2022. Our 2023 fiscal year was a 52-week period that ended on December 31, 2023 ("fiscal 2023"). Our 2022 fiscal year was a 53-week period that ended on December 31, 2022 ("fiscal 2022") and our fiscal 2021 was a 52-week period that ended on December 25, 2021 (“fiscal 2021”).

Business Performance Summary

Net sales increased 11% to $1,929.8 million in fiscal 2023 from $1,733.7 million in fiscal 2022. Fiscal 2022 included an additional week, which we estimate contributed $19.2 million in net sales. Net income

increased 6% to $129.3 million in fiscal 2023 from $121.5 million in fiscal 2022. Additionally, in fiscal 2023 we generated $208.8 million of cash flows from operations, repaid a total of $159.1 million of outstanding debt obligations, and repurchased 201,632 common shares under our share repurchase program for $15.3 million.

New Product Development

New product development is an important success factor for us and has been a source of growth for us. We have made incremental investments to increase our new product development efforts to grow our business and strengthen our relationships with our customers. The investments primarily have been in the form of increased product development resources, increased customer and end-user awareness programs, and customer service improvements. These investments historically have enabled us to provide an expanding array of new product offerings and grow revenues at levels that generally have exceeded market growth rates.

In fiscal 2023, we introduced 6,106 new distinct parts to our customers and end-users, including 1,791 “New-to-the-Aftermarket” parts. Please see ITEM 1, “Business – Product Development” for a year-over-year comparison of new product introductions.

One area of focus for the light-duty sector has been our complex electronics program, which capitalizes on the growing number of electronic components being utilized on today’s OE platforms. New vehicles contain an average of approximately 100 electronic modules, with some high-end luxury vehicles exceeding that. Our complex electronics products are designed and developed in-house and tested to help ensure consistent performance, and our product portfolio is focused on further developing our leadership position in the category.

Another area of focus has been on products we market for the heavy-duty sector. We believe that this sector provides many of the same growth opportunities that the light-duty sector has provided us. We specialize in offering parts to this sector that were traditionally only available from OE manufacturers or salvage yards, similar to how we approach the light-duty sector.

Within the specialty vehicle sector, we focus on providing performance parts and accessories, and nondiscretionary repair parts for UTVs and ATVs. We are dedicated to developing better and more innovative materials that will be compatible across a wide variety of makes and models to enhance both the performance and appearance of customers’ vehicles.

Acquisitions

A key component of our strategy is growth through acquisitions. On October 4, 2022, we acquired Super ATV, a leading independent supplier to the powersports aftermarket with a family of highly respected brands spanning functional accessories and upgrades, as well as replacement parts for specialty vehicles. On August 10, 2021, we acquired Dayton Parts, a manufacturer of chassis and other parts designed to serve the heavy-duty vehicle sector of the aftermarket. See Note 2, "Business Acquisitions and Investments" under Notes to Consolidated Financial Statements for additional information. We may acquire businesses in the future to supplement our financial growth, increase our customer base, add to our distribution capabilities or enhance our product development resources, among other reasons.

Industry Factors

The Company’s financial results are also impacted by various industry factors, including, but not limited to the number, age and condition of vehicles in operation at any one time, and the miles driven by those vehicles.

Vehicles in Operation

The Company’s products are primarily purchased and installed on a subsegment of the passenger and light-duty vehicles in operation in the United States (“VIO”), specifically weighted towards vehicles aged 8-to-13-years-old. Each year, the United States seasonally adjusted annual rate (“US SAAR”) of new vehicles purchased adds a new year to the VIO. According to data from the Auto Care Association (“Auto Care”), the US SAAR experienced a decline from 2008 to 2011 as consumers purchased fewer new vehicles as a result of the Great Recession of 2008. We believe that the declining US SAAR during that period resulted in a follow-on decline in our primary VIO subsegment (8-to 13-year-old vehicles) commencing in 2016. However, following

2011 and the impact of the Great Recession of 2008, U.S. consumers began to increase their purchases of new vehicles which over time caused the US SAAR to recover and return to more historical levels. The 8-to-13-year-old vehicle car parc has continued to grow over the past several years, which we expect will expand demand for aftermarket replacement parts as more vehicles remain in operation.

In addition, we believe that vehicle owners generally are operating their current vehicles longer than they did several years ago, performing necessary repairs and maintenance to keep those vehicles well maintained. We believe this trend has supported an increase in VIO, which increased to 295.9 million, a 1% increase in 2023 over 2022. According to data published by Polk, a division of IHS Automotive, the average age of VIO increased to 12.6 years as of October 2023 from 12.4 years as of October 2022.

Miles Driven

The number of miles driven is another important statistic that impacts our business. Generally, as vehicles are driven more miles, the more likely it is that parts will fail and there will be increased demand for replacement parts, including our parts. According to the U.S. Department of Transportation, the number of miles driven through October 2023 increased 2.1% year over year in the light-duty sector. However, global gasoline prices remained high during fiscal 2023 and, if they continue, they may negatively impact miles driven as consumers reduce travel or seek alternative methods of transportation.

Brand Protection

We operate in a highly competitive market. As a result, we are continuously evaluating our approach to brand, pricing and terms to our different customers and channels. For example, we maintain brand protection policies, which are designed to ensure that certain of our branded products are not advertised below certain approved pricing levels. In addition, we may pursue legal remedies when we see third parties violating our intellectual property rights, including those that violate our patents, wrongfully represent our products as their own or use our product images for their own marketing efforts.

Discounts, Allowances, and Incentives

We offer a variety of customer discounts, rebates, defective and slow-moving product returns and other incentives. We may offer cash discounts for paying invoices in accordance with the specified discount terms of the invoice. In addition, we may offer pricing discounts based on volume purchased from us or other pricing discounts related to programs under a customer’s agreement. These incentives can be in the form of “off-invoice” discounts that are immediately deducted from sales at the time of sale. For those customers that choose to receive their incentives on a quarterly or annual basis instead of “off-invoice,” we provide rebates and accrue for such incentives as the related sales are made and reduce sales accordingly. Finally, rebates and discounts are provided to customers to support promotional activities such as advertising and sales force allowances.

Our customers, particularly our larger retail customers, regularly seek more favorable pricing and product return provisions, and extended payment terms when negotiating with us. We attempt to avoid or minimize these concessions as much as possible, but we have granted pricing concessions, indemnification rights and extended customer payment terms, and allowed a higher level of product returns in certain cases. These concessions impact net sales as well as our profit levels and may require additional capital to finance the business. We expect our customers to continue to exert pressure on our margins.

New Customer Acquisition Costs

We may incur customer acquisition costs where we incur change-over costs to induce a customer to switch from a competitor’s brand, including expanding new product lines into our existing customers. Change-over costs include the costs related to removing the new customer’s inventory and replacing it with our inventory, which is commonly referred to as a stock lift. Customer acquisition costs are recorded as a reduction to revenue when incurred.

Product Warranty and Overstock Returns

vehicle products. In addition to warranty returns, we may permit our customers to return new, undamaged products to us within customer-specific limits if they have overstocked their inventories. At the time products are sold, we accrue a liability for product warranties and overstock returns as a percentage of sales based upon estimates established using historical information on the nature, frequency and average cost of the claim and the probability of the customer return. Significant judgments and estimates must be made and used in connection with establishing the sales returns and other allowances in any accounting period. Revision to these estimates is made when necessary, based upon changes in these factors. We regularly study trends of such claims.

Foreign Currency

Many of our products and related raw materials and components are purchased from suppliers in a variety of non-U.S. countries. The products generally are purchased through purchase orders with the purchase price specified in U.S. dollars. Accordingly, we generally do not have exposure to fluctuations in the relationship between the U.S. dollar and various foreign currencies between the time of execution of the purchase order and payment for the product.

To the extent that the U.S. dollar changes in value relative to those foreign currencies in the future, the prices charged by our suppliers for goods under new purchase orders may change in equivalent U.S. dollars. The largest portion of our overseas purchases comes from China. The Chinese yuan to U.S. dollar exchange rate has fluctuated over the past several years. Any future changes in the value of the Chinese yuan relative to the U.S. dollar may result in a change in the cost of goods that we purchase from China. However, the cost of the goods we procure is also affected by other factors, including raw material availability, labor cost, tariffs and transportation costs.

We have operations located outside the United States with various functional currencies. Because our consolidated financial statements are denominated in U.S. dollars, the assets, liabilities, net sales, and expenses that are denominated in currencies other than the U.S. dollar must be converted into U.S. dollars using exchange rates for the current period. As a result, fluctuations in foreign currency exchange rates may impact our financial results.

Impact of Labor Market and Inflationary Costs

We have experienced broad-based inflationary impacts during the year ended December 31, 2023, due primarily to global transportation and logistics constraints, which have resulted in significantly higher transportation costs; tariffs; material costs; and wage inflation from an increasingly competitive labor market. Higher labor costs and material inflation costs may continue to negatively impact our results in the future, despite signs of global supply chain constraints easing. We attempt to offset inflationary pressures with cost-saving initiatives, price increases to customers and the use of alternative suppliers. There can be no assurance that we will be successful in implementing pricing increases in the future to recover increased inflationary costs.

Impact of Interest Rates

Our business is subject to interest rate risk under the terms of our customer accounts receivable sales programs, as a change in the Term Secured Overnight Financing Rate (“Term SOFR”) or alternative discount rate affects the cost incurred to factor eligible accounts receivable. Additionally, our outstanding borrowings under our credit facility bear interest at variable rates tied to Term SOFR or the applicable base rate. Under the terms of the credit facility, a change in interest rates affects the rate at which we can borrow funds thereunder and also impacts the interest cost on existing borrowings. Interest rates may hold steady at their current rates for prolonged periods or may increase in the future, resulting in increased costs associated with our accounts receivable sales programs and outstanding borrowings.

Impact of Tariffs

In the third quarter of 2018, the Office of the United States Trade Representative (USTR) began imposing additional tariffs on products imported from China, including many of our products, ranging from 7.5% to 25%. The tariffs enacted to date increase the cost of many of the products that are manufactured for us in China. We have taken several actions to mitigate the impact of the tariffs including, but not limited to, price increases to our customers and cost concessions from our suppliers. We expect to continue mitigating the impact of tariffs primarily through, among other things, diversification of suppliers across geographies and selling price

increases to offset the higher tariffs incurred. Tariffs are not expected to have a material impact on our net income but are expected to increase net sales and lower our gross and operating profit margins.

In January 2020, the USTR granted temporary tariff relief for certain categories of products being imported from China. The tariff relief granted by the USTR expired on most categories of products being imported from China at the end of 2020. However, in March 2022, the USTR reinstated tariff relief for certain categories of products imported from China. The reinstated tariff relief applies retroactively to October 12, 2021 and is scheduled to expire on May 31, 2024. The reinstated tariff relief applies to a limited number of our products and is not expected to materially impact our operating results.

Results of Operations

The following table sets forth, for the periods indicated, the dollar value and percentage of net sales represented by certain items in our Consolidated Statements of Operations:


	For the Fiscal Year Ended
(in thousands, except percentage data)	December 31, 2023				December 31, 2022
Net sales	$	1,929,788	100.0	%	$	1,733,749	100.0	%
Cost of goods sold	1,244,365		64.5	%	1,169,299		67.4	%
Gross profit	685,423		35.5	%	564,450		32.6	%
Selling, general and administrative expenses	470,663		24.4	%	393,402		22.7	%
Income from operations	214,760		11.1	%	171,048		9.9	%
Interest expense, net	48,061		2.5	%	15,582		0.9	%
Other income, net	(1,804)		(0.1)	%	(735)		-0.0	%
Income before income taxes	168,503		8.7	%	156,201		9.0	%
Provision for income taxes	39,244		2.0	%	34,652		2.0	%
Net income	$	129,259	6.7	%	$	121,549	7.0	%

*Percentage of sales information may not add due to rounding

Fiscal Year Ended December 31, 2023 Compared to Fiscal Year Ended December 31, 2022

Net sales increased 11% to $1,929.8 million in fiscal 2023 from $1,733.7 million in fiscal 2022. The increase in net sales reflected the addition of SuperATV in October 2022, price increases to offset inflation, and higher volume including the introduction of new products to market, partially offset by an additional week in fiscal 2022, which we estimate increased fiscal 2022 net sales by $19.2 million. Net sales growth for the year ended December 31, 2023 excluding the incremental period of SuperATV net sales was 2%.

Gross profit margin was 35.5% of net sales in fiscal 2023 compared to 32.6% of net sales in fiscal 2022. The increase in gross margin as a percentage of net sales was primarily due to the addition of SuperATV, which has a higher gross margin percentage than the Company average, cost saving initiatives, and pricing actions taken to offset inflation, partially offset by the sell-through of high-cost inventory purchased in 2022 that was impacted by inflationary costs.

Selling, general and administrative ("SG&A") expenses were $470.7 million, or 24.4% of net sales, in fiscal 2023 compared to $393.4 million, or 22.7% of net sales, in fiscal 2022. The increase in SG&A expenses as a percentage of net sales was primarily due to the impact of higher interest rates on our customer accounts receivable factoring programs and the addition of SuperATV, which has higher SG&A expenses as a percentage of net sales than the Company average. The increase was also impacted by higher amortization of intangible assets, and a charge recorded related to a customer bankruptcy filing, partially offset by a decrease in the fair value estimate of a contingent consideration obligation for a potential earnout payment on a previous acquisition in the year ended December 31, 2023.

Our effective tax rate increased to 23.3% in fiscal 2023 from 22.2% in fiscal 2022. The increase in the effective tax rate was primarily due to the effect of foreign operations and a favorable discrete benefit recorded in fiscal 2022.

Segment Operating Results

Segment operating results were as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022
Net Sales:
Light Duty	$	1,462,474	$	1,425,892
Heavy Duty	256,913		258,215
Specialty Vehicle	210,401		49,642
Total	$	1,929,788	$	1,733,749

Segment income from operations:
Light Duty	187,159		169,579
Heavy Duty	14,505		29,738
Specialty Vehicle	31,618		8,537
Total	$	233,282	$	207,854

Light Duty

Light Duty net sales increased 3% to $1,462.5 million in fiscal 2023 from $1,425.9 million in fiscal 2022. The increase in net sales reflected price increases to offset inflation, and higher volume including the introduction of new products to market, partially offset by an additional week in fiscal 2022, which we estimate increased fiscal 2022 Light Duty net sales by $16.8 million.

Light Duty segment income from operations as a percentage of net sales increased to 12.8% in fiscal 2023 from 11.9% in fiscal 2022. This increase was primarily driven by pricing increases and cost savings initiatives to offset inflation.

Heavy Duty

Heavy Duty net sales decreased 1% to $256.9 million in fiscal 2023 from $258.2 million in fiscal 2022. The decrease in net sales was primarily due to lower trucking demand in fiscal 2023 which reduced the demand for replacement parts. Additionally, fiscal 2022 included higher volumes as customers restocked inventories coming out of the global pandemic and supply chain pressures began to ease.

Heavy Duty segment income from operations as a percentage of net sales decreased to 5.6% in fiscal 2023 from 11.5% in fiscal 2022. This decrease was primarily driven by the sell through of high-cost inventory that was purchased during peak inflationary times, partially offset by cost savings initiatives and pricing actions implemented.

Specialty Vehicle

Specialty Vehicle net sales were $210.4 million in fiscal 2023 compared to $49.6 million in fiscal 2022. The increase in net sales was due to inclusion of a full-year results in fiscal 2023 whereas fiscal 2022 only included results following our acquisition of SuperATV in October 2022.

Specialty Vehicle segment income from operations as a percentage of net sales decreased to 15.0% in fiscal 2023 from 17.2% in fiscal 2022. This decrease was primarily driven by product mix.

Liquidity and Capital Resources

Historically, our primary sources of liquidity have been our invested cash and the cash flow we generate from our operations, including accounts receivable sales programs provided by certain customers. Cash and cash equivalents at December 31, 2023 decreased to $36.8 million from $46.0 million at December 31, 2022. Working capital was $686.6 million at December 31, 2023 compared to $590.8 million at December 31, 2022. Shareholders’ equity was $1,168.2 million at December 31, 2023 and $1042.6 million at December 31, 2022.

Based on our current operating plan, we believe that our sources of available capital are adequate to meet our ongoing cash needs for at least the next twelve months. However, our liquidity could be negatively affected by extending payment terms to customers, a decrease in demand for our products, higher interest rates, the outcome of contingencies or other factors. See Note 10, “Commitments and Contingencies”, in the accompanying consolidated financial statements for additional information regarding commitments and contingencies that may affect our liquidity.

At December 31, 2023, our long-term cash requirements under our various contractual obligations include non-cancellable operating leases and outstanding borrowings under our credit agreement as follows:

•Operating leases – total obligations under non-cancellable operating leases were $124.0 million, with $21.1 million due over the next twelve months. Refer to Note 5, “Leases”, in the accompanying consolidated financial statements for additional information regarding our leases.

•Credit agreement – total obligations under our credit agreement were $577.1 million, with $15.6 million due over the next twelve months. Refer to Note 7, “Long-Term Debt”, in the accompanying consolidated financial statements for additional information regarding our credit agreement.

Tariffs

Tariffs increase our use of cash since we pay for the tariffs upon the arrival of our goods in the United States but collect the cash on any passthrough price increases from our customers on a delayed basis according to the payment terms negotiated with our customers.

Payment Terms and Accounts Receivable Sales Programs

Over the past several years, we have continued to extend payment terms to certain customers as a result of customer requests and market demands. These extended terms have resulted in increased accounts receivable levels and significant uses of cash. Where available and when we deem appropriate, we participate in accounts receivable sales programs with several customers that allow us to sell our accounts receivable to financial institutions to offset the negative cash flow impact of these payment term extensions. However, any sales of accounts receivable through these programs ultimately result in us receiving a lesser amount of cash upfront than if we collected those accounts receivable ourselves in due course, resulting in accounts receivable factoring costs. Moreover, since these accounts receivable sales programs bear interest at rates tied to the Term SOFR or other reference rates, increases in these applicable rates increase our cost to sell our receivables and reduce the amount of cash we receive. See ITEM 7A, “Quantitative and Qualitative Disclosures about Market Risk” for more information. Further extensions of customer payment terms would result in additional uses of cash or increased costs associated with the sales of accounts receivable.

During fiscal 2023 and fiscal 2022, we sold approximately $949.5 million and $1,048.7 million, respectively, under these programs. If receivables had not been sold, $526.4 million and $722.3 million of additional receivables would have been outstanding at December 31, 2023 and December 31, 2022, respectively, based on standard payment terms. We had capacity to sell more accounts receivable under these programs if the needs of the business warranted. Further extensions of customer payment terms would result in additional uses of cash or increased costs associated with the sales of accounts receivable.

During the years ended December 31, 2023 and December 31, 2022, factoring costs associated with these accounts receivable sales programs were $50.2 million and $37.2 million, respectively. The increase in factoring costs year over year was primarily driven by higher Term SOFR and other reference rates, partially offset by lower accounts receivable sold under these programs.

Credit Agreement

On August 10, 2021, in connection with the acquisition of Dayton Parts, we entered into a credit agreement that provided for a $600.0 million revolving credit facility, including a letter of credit sub-facility of up to $60.0 million (the “2021 Facility”). The 2021 Facility replaced our previous $100.0 million revolving credit facility. The 2021 Facility was scheduled to mature on August 10, 2026, was guaranteed by the

Company’s material domestic subsidiaries (together with the Company, the “Credit Parties”) and was supported by a security interest in substantially all of the Credit Parties’ personal property and assets, subject to certain exceptions.

On October 4, 2022, Dorman entered into an amendment and restatement of the 2021 Facility (as amended and restated, the “New Facility”) by and among Dorman, the lenders from time to time party thereto, and the administrative agent. In addition to including the existing $600.0 million revolving credit facility, the New Facility includes a $500.0 million term loan, which was used to fund the SuperATV acquisition. The New Facility (including the revolving portion of the New Facility) matures on October 4, 2027, is guaranteed by the Credit Parties and is supported by a security interest in substantially all of the Credit Parties’ personal property and assets, subject to certain exceptions.

As of December 31, 2023, we were not in default with respect to the New Facility. As of December 31, 2023, there was $92.8 million in outstanding borrowings under the revolver, and $484.4 million in outstanding borrowings under the term loan portions of the New Facility, and as of such date we had outstanding letters of credit for $1.3 million in the aggregate. Net of outstanding borrowings and letters of credit, we had $505.9 million available under the New Facility at December 31, 2023.

Refer to Note 2, “Business Acquisitions and Investments,” in the Notes to the Consolidated Financial Statements for additional information.

Refer to Note 7, "Long-Term Debt" under Notes to Consolidated Financial Statements for additional information regarding the New Facility

Cash Flows

Below is a table setting forth the key lines of our Consolidated Statements of Cash Flows:


	For the Fiscal Year Ended
(in thousands)	December 31, 2023		December 31, 2022
Cash provided by operating activities	$	208,758	$	41,688
Cash used in investing activities	(43,901)		(526,839)
Cash (used in) provided by financing activities	(174,109)		472,496
Effect of foreign exchange on cash and cash equivalents	32		(93)
Net decrease in cash and cash equivalents	$	(9,220)	$	(12,748)

During fiscal 2023, cash provided by operating activities was $208.8 million compared to $41.7 million during fiscal 2022. The $167.1 million increase was driven by cash inflows for working capital versus cash outflows from working capital in the prior year period, primarily from the reduction of inventory, as well as higher income.

Investing activities used $43.9 million and $526.8 million of cash in fiscal 2023 and 2022, respectively.

•During fiscal 2022, we used $489.0 million to acquire SuperATV, net of cash acquired.

•Capital spending totaled $44.0 million and $37.0 million in fiscal 2023 and 2022, respectively. The increase in capital spending is primarily due to the inclusion of a full year of SuperATV spending compared to a partial year in fiscal 2022 following its acquisition in October 2022.

Financing activities used cash of $174.1 million in fiscal 2023 and provided cash of $472.5 million in fiscal 2022.

•During fiscal 2023, we repaid $146.6 million of outstanding borrowings under our revolving credit facility, and $12.5 million of our term loan balance under our credit agreement.

•During fiscal 2023, we paid $15.3 million to repurchase 201,632 common shares under our share repurchase plan.

•During fiscal 2022, we borrowed $500.0 million under the New Facility to help fund the acquisition of SuperATV in October 2022, and subsequently repaid $3.1 million of that borrowing in December 2022. Additionally, during fiscal 2022, we paid $17.6 million to repurchase 180,750 common shares under our share repurchase plan.

•The remaining uses of cash from financing activities in each period resulted from stock compensation plan activity and the repurchase of shares of our common stock held in a fund under our 401(k) Plan. Plan participants can no longer purchase shares of Dorman common stock as an investment option under the 401(k) Plan. Shares are generally purchased from the 401(k) Plan when participants sell units as permitted by the 401(k) Plan or elect to leave the 401(k) Plan upon retirement, termination or other reasons.

Off-Balance Sheet Arrangements

Off-balance sheet arrangements are transactions, agreements, or other contractual arrangements with an unconsolidated entity for which we have an obligation to the entity that is not recorded in our consolidated financial statements. We historically have not utilized off-balance sheet financial instruments, and currently do not plan to utilize off-balance sheet arrangements in the future to fund our working capital requirements, operations or growth plans.

We may issue standby letters of credit under our credit agreement. Letters of credit totaling $1.3 million and $1.0 million were outstanding at December 31, 2023 and 2022, respectively. Those letters of credit are issued primarily to satisfy the requirements of workers compensation, general liability and other insurance policies. Each of the outstanding letters of credit has a one-year term from the date of issuance.

We do not have any off-balance sheet financing that has, or is reasonably likely to have, a material, current or future effect on our financial condition, revenues, expenses, cash flows, results of operations, liquidity, capital expenditures or capital resources.

Related-Party Transactions

During fiscal 2022 and a portion of fiscal 2023, we had two non-cancelable operating leases for operating facilities from entities in which Steven L. Berman, our Non-Executive Chairman, and his family members were owners. Total annual rental payments each year to those entities under the lease arrangements were $2.9 million and $2.5 million in fiscal 2023 and fiscal 2022, respectively. On December 1, 2023, one of the leases was assumed by a third-party purchaser in connection with a sale of the underlying property to the third party.

During fiscal 2023 and for a portion of fiscal 2022, we leased our facilities in Madison, IN and Shreveport, LA, from entities in which Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicles, and certain of her family members are owners. Each lease is a non-cancelable operating lease. Total rental payments to those entities under these lease arrangements were $2.6 million in fiscal 2023 and $0.5 million in fiscal 2022. The leases for our operating facilities in Madison, IN and Shreveport, LA were renewed in October 2022 in connection with the acquisition of SuperATV and will expire on October 31, 2027.

During fiscal 2023 and for a portion of fiscal 2022, we had a warehouse storage and services agreement with a counterparty that is majority-owned by a family member of Ms. Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicle. The agreement provides for indoor storage space and material handling services at agreed-upon rates. Total payments under the arrangement were $0.2 million in fiscal 2023 and less than $0.1 million in fiscal 2022. The agreement was signed in October 2020 and expired in October 2023, but was extended on a month-to-month basis.

We are a partner in a joint venture with one of our suppliers and own minority interest investments in two other suppliers. Purchases from these companies were $22.7 million and $24.9 million in fiscal 2023 and fiscal 2022, respectively.

Critical Accounting Policies and Estimates

Our discussion and analysis of our financial condition and results of operations are based upon the Consolidated Financial Statements, which have been prepared in accordance with U.S. generally accepted accounting principles. The preparation of these financial statements requires us to make estimates, judgments and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent liabilities and the reported amounts of revenues and expenses. Estimates and judgments are based upon historical experience and on various other assumptions believed to be accurate and reasonable under the circumstances. Actual results may differ materially from these estimates due to different assumptions or conditions. The following areas all require the use of subjective or complex estimates, judgments and assumptions.

Revenue Recognition and Accrued Customer Rebates and Returns. Revenue is recognized from product sales when goods are shipped, title and risk of loss and control have been transferred to the customer and collection is reasonably assured. We record estimates for cash discounts, defective and slow-moving product returns, promotional rebates, core return deposits, and other discounts in the period of the sale ("Customer Credits"). The provision for Customer Credits is recorded as a reduction from gross sales and reserves for Customer Credits are shown as an increase of accrued customer rebates and returns, which is included in current liabilities. Customer Credits are estimated based on contractual provisions, historical experience, and our assessment of current market conditions. Historically, actual Customer Credits have not differed materially from estimated amounts. Amounts billed to customers for shipping and handling are included in net sales. Costs associated with shipping and handling are included in cost of goods sold.

Excess and Obsolete Inventory Reserves. We must make estimates of potential future excess and obsolete inventory costs. We provide reserves for discontinued and excess inventory based upon historical demand, forecasted usage, estimated customer requirements and product line updates. We maintain contact with our customer base to understand buying patterns, customer preferences and the life cycle of our products. Changes in customer requirements are factored into the reserves, as needed.

Purchase Accounting. The purchase price of an acquired business is allocated to the underlying tangible and intangible assets acquired and liabilities assumed based upon their respective fair market values, with any excess recorded as goodwill. Such fair market value assessments require judgments and estimates which may change over time and may cause the final amounts to differ materially from original estimates. Any adjustments to fair value assessments are recorded to goodwill over the purchase price allocation period which cannot exceed twelve months from the date of acquisition. Refer to Note 2, "Business Acquisitions and Investments”, in the accompanying consolidated financial statements for additional information.

Recently Issued Accounting Pronouncements

Refer to Note 1, “Summary of Significant Accounting Policies” in the accompanying consolidated financial statements for additional information on recently issued accounting pronouncements.

ITEM 7A. Quantitative and Qualitative Disclosures about Market Risk.

Our market risk is the potential loss arising from adverse changes in interest rates. Accounts receivable factored under our customer-sponsored accounts receivable sales programs bear interest at rates tied to Term SOFR or alternative discount rates and result in us incurring costs as those accounts receivable are factored. Additionally, interest expense from our variable rate debt is impacted by reference rates.

Under the terms of our customer-sponsored programs to sell accounts receivable, a change in the reference rate would affect the amount of financing costs we incur, and the amount of cash we receive upon the sales of accounts receivable under these programs. A one-percentage-point increase in Term SOFR or the discount rates on the accounts receivable sales programs would have increased our factoring costs and reduced the amount of cash we would have received by approximately $7.9 million, $8.7 million and $6.7 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively.

Under the terms of our New Facility, a change in the reference rate or the lender’s base rate would affect the rate at which we could borrow funds thereunder. A one-percentage-point increase in the reference rate or base rate would have increased our interest expense on our variable rate debt under our credit agreement by

approximately $6.8 million, $2.4 million and $1.1 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively.

These estimates assume that our level of sales of accounts receivable and variable rate debt balance remains constant for an annual period and the interest rate change occurs at the beginning of the period. The hypothetical changes and assumptions may be different from what occurs in the future. See ITEM 1A, “Risk Factors – Risks Related to Our Capital Structure and Finances” for information regarding the risks relating to our indebtedness, our accounts receivable sales agreements and interest rates.

ITEM 8. Financial Statements and Supplementary Data.

Our financial statement schedule that is filed with this Annual Report on Form 10-K is listed in PART IV –ITEM 15, “Exhibits, Financial Statement Schedules.”

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors

Dorman Products, Inc.:

Opinion on the Consolidated Financial Statements

We have audited the accompanying consolidated balance sheets of Dorman Products, Inc. and subsidiaries (the Company) as of December 31, 2023 and 2022, the related consolidated statements of operations and comprehensive income, shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2023, and the related notes and financial statement schedule II (collectively, the consolidated financial statements). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2023 and 2022, and the results of its operations and its cash flows for each of the years in the three-year period ended December 31, 2023, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission, and our report dated February 28, 2024 expressed an unqualified opinion on the effectiveness of the Company’s internal control over financial reporting.

Basis for Opinion

These consolidated financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on these consolidated financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the consolidated financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the consolidated financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of a critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

Accrual for customer credits for defective product returns

As disclosed in Notes 1 and 12 to the consolidated financial statements, the Company estimates customer credits for defective product returns and other items. The accrual for customer credits to be issued for defective product returns includes assumptions about the length of time between when a sale occurs and a credit is issued. The provision for customer credits is reflected in the consolidated financial statements as a reduction from gross

sales and accruals for customer credits are a portion of accrued customer rebates and returns. At December 31, 2023, accrued customer rebates and returns were $204.5 million.

We identified the evaluation of the accrual for customer credits for defective product returns as a critical audit matter. Subjective auditor judgment was required to evaluate the Company’s determination of the impact of market conditions on the length of time between when a sale occurs and a credit is issued for defective product returns.

The following are the primary procedures we performed to address this critical audit matter. We evaluated the design and tested the operating effectiveness of certain internal controls related to the Company’s process to record the accrual for customer credits for defective product returns. This included a control related to the determination of the impact of market conditions on the length of time between when a sale occurs and a credit is issued for defective product returns. We assessed the Company’s accrual for customer credits for defective product returns by evaluating (1) the historical relationship between sales and customer credits for defective product returns, (2) the Company’s internal data, (3) certain external market data, and (4) a sample of executed third-party contracts. We inquired of personnel within the Company’s quality control department regarding the impact of current market conditions on the length of time between when a sale occurs and a credit is issued for defective product returns. We analyzed a sample of customer credits issued after year-end and evaluated their effect on the accrual.

/s/ KPMG LLP

We have served as the Company’s auditor since 2002.

Philadelphia, Pennsylvania

February 28, 2024

DORMAN PRODUCTS, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME


	For the Year Ended
(in thousands, except per share data)	December 31, 2023		December 31, 2022		December 25, 2021
Net sales	$	1,929,788	$	1,733,749	$	1,345,249
Cost of goods sold	1,244,365		1,169,299		882,333
Gross profit	685,423		564,450		462,916
Selling, general and administrative expenses	470,663		393,402		291,365
Income from operations	214,760		171,048		171,551
Interest expense, net	48,061		15,582		2,162
Other income, net	(1,804)		(735)		(377)
Income before income taxes	168,503		156,201		169,766
Provision for income taxes	39,244		34,652		38,234
Net income	$	129,259	$	121,549	$	131,532
Other comprehensive income:
Change in foreign currency translation adjustment	$	713	$	(1,863)	$	(1,440)
Comprehensive Income	$	129,972	$	119,686	$	130,092

Earnings per share:
Basic	$	4.11	$	3.87	$	4.13
Diluted	$	4.10	$	3.85	$	4.12
Weighted average shares outstanding:
Basic	31,455		31,434		31,810
Diluted	31,533		31,543		31,961

See accompanying Notes to Consolidated Financial Statements.

DORMAN PRODUCTS, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS


(in thousands, except share data)	December 31, 2023		December 31, 2022
Assets
Current assets:
Cash and cash equivalents	$	36,814	$	46,034
Accounts receivable, less allowance for doubtful accounts of $3,518 and $1,363	526,867		427,385
Inventories	637,375		755,901
Prepaids and other current assets	32,653		39,800
Total current assets	1,233,709		1,269,120
Property, plant and equipment, net	160,113		148,477
Operating lease right-of-use assets	103,476		109,977
Goodwill	443,889		443,035
Intangible assets, net	301,556		322,409
Other assets	49,664		48,768
Total assets	$	2,292,407	$	2,341,786
Liabilities and shareholders' equity
Current liabilities:
Accounts payable	$	176,664	$	179,819
Accrued compensation	23,971		19,490
Accrued customer rebates and returns	204,495		192,116
Revolving credit facility	92,760		239,363
Current portion of long-term debt	15,625		12,500
Other accrued liabilities	33,636		35,007
Total current liabilities	547,151		678,295
Long-term debt	467,239		482,464
Long-term operating lease liabilities	91,262		98,221
Other long-term liabilities	9,627		28,349
Deferred tax liabilities, net	8,925		11,826
Commitments and contingencies (Note 10)
Shareholders' equity:
Common stock, par value $0.01; authorized 50,000,000 shares; issued and outstanding 31,299,770 and 31,430,632 shares in 2023 and 2022, respectively	313		314
Additional paid-in capital	101,045		88,750
Retained earnings	1,069,435		956,870
Accumulated other comprehensive loss	(2,590)		(3,303)
Total shareholders' equity	1,168,203		1,042,631
Total liabilities and shareholders' equity	$	2,292,407	$	2,341,786

See accompanying Notes to Consolidated Financial Statements.

DORMAN PRODUCTS, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY


	Common Stock			Additional Paid-In Capital		Retained Earnings		Accumulated Other Comprehensive Loss		Total
(in thousands, except share data)	Shares Issued	Par Value
Balance at December 26, 2020	32,168,740	$	322	$	64,085	$	789,152	$	—	$	853,559
Exercise of stock options	41,700	—		2,455		—		—		2,455
Compensation expense under incentive stock plan	—	—		8,228		—		—		8,228
Purchase and cancellation of common stock	(617,080)	(6)		(1,111)		(61,639)		—		(62,756)
Issuance of non-vested stock, net of cancellations	28,914	—		3,261		—		—		3,261
Other stock-related activity, net of tax	(14,765)	—		533		(2,636)		—		(2,103)
Other comprehensive loss	—	—		—		—		(1,440)		(1,440)
Net income	—	—		—		131,532		—		131,532
Balance at December 25, 2021	31,607,509	316		77,451		856,409		(1,440)		932,736
Exercise of stock options	18,515	—		1,046		—		—		1,046
Compensation expense under incentive stock plan	—	—		9,370		—		—		9,370
Purchase and cancellation of common stock	(203,765)	(2)		(367)		(19,565)		—		(19,934)
Issuance of non-vested stock, net of cancellations	27,224	—		2,032		—		—		2,032
Other stock-related activity, net of tax	(18,851)	—		(782)		(1,523)		—		(2,305)
Other comprehensive loss	—	—		—		—		(1,863)		(1,863)
Net income	—	—		—		121,549		—		121,549
Balance at December 31, 2022	31,430,632	314		88,750		956,870		(3,303)		1,042,631
Exercise of stock options	17,489	—		1,167		—		—		1,167
Compensation expense under incentive stock plan	—	—		11,484		—		—		11,484
Purchase and cancellation of common stock	(215,410)	(2)		(387)		(16,104)		—		(16,493)
Issuance of non-vested stock, net of cancellations	93,437	1		1,985		—		—		1,986
Other stock-related activity, net of tax	(26,378)	—		(1,954)		(590)		—		(2,544)
Other comprehensive loss	—	—		—		—		713		713
Net income	—	—		—		129,259		—		129,259
Balance at December 31, 2023	31,299,770	$	313	$	101,045	$	1,069,435	$	(2,590)	$	1,168,203

See accompanying Notes to Consolidated Financial Statements.

DORMAN PRODUCTS, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Cash Flows from Operating Activities:
Net income	$	129,259	$	121,549	$	131,532
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	54,729		44,677		35,193
Provision for doubtful accounts	4,592		86		181
Benefit from deferred income taxes	(2,960)		(5,880)		(11,970)
Provision for stock-based compensation	11,484		9,370		8,228
Fair value adjustment to contingent consideration	(20,468)		—		—
Payment of contingent consideration	—		(120)		(2,418)
Changes in assets and liabilities:
Accounts receivable	(104,020)		48,479		10,918
Inventories	118,606		(133,790)		(153,823)
Prepaids and other current assets	15,324		(11,150)		(2,680)
Other assets	(4,931)		(28)		(5,004)
Accounts payable	(3,138)		(5,542)		47,000
Accrued customer rebates and returns	12,372		2,433		31,275
Accrued compensation and other liabilities	(2,091)		(28,396)		11,906
Cash provided by operating activities	208,758		41,688		100,338
Cash Flows from Investing Activities:
Acquisitions, net of cash acquired	67		(488,956)		(345,483)
Property, plant and equipment additions	(43,968)		(37,883)		(19,840)
Cash used in investing activities	(43,901)		(526,839)		(365,323)
Cash Flows from Financing Activities:
Proceeds of revolving credit line	—		10,000		252,360
Payments of revolving credit line	(146,600)		(10,000)		(13,000)
Proceeds of long-term debt	—		500,000		—
Payments of long-term debt	(12,500)		(3,125)		—
Payment of contingent consideration	—		(1,705)		(7,982)
Payment of debt issuance costs	—		(3,918)		(4,215)
Proceeds from exercise of stock options	1,167		1,046		2,455
Purchase and cancellation of common stock	(15,709)		(19,934)		(62,649)
Other stock-related activity	(467)		132		1,266
Cash (used in) provided by financing activities	(174,109)		472,496		168,235
Effect of exchange rate changes on Cash and Cash Equivalents	32		(93)		(44)
Net (Decrease) Increase in Cash and Cash Equivalents	(9,220)		(12,748)		(96,794)
Cash and Cash Equivalents, Beginning of Period	46,034		58,782		155,576
Cash and Cash Equivalents, End of Period	$	36,814	$	46,034	$	58,782
Supplemental Cash Flow Information
Cash paid for interest expense	$	49,507	$	11,647	$	1,782
Cash paid for income taxes	$	35,465	$	62,861	$	46,225

See accompanying Notes to Consolidated Financial Statements.

DORMAN PRODUCTS, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

DECEMBER 31, 2023

1. Summary of Significant Accounting Policies

Dorman Products, Inc. ("Dorman", the "Company", “we”, “us”, or “our”) is a supplier of replacement and upgrade parts in the motor vehicle aftermarket industry, serving passenger cars, light-, medium-, and heavy-duty trucks as well as specialty vehicles, including utility terrain vehicles (UTVs) and all-terrain vehicles (ATVs). We operate through three business segments: Light Duty, Heavy Duty, and Specialty Vehicle, consistent with the sectors of the motor vehicle aftermarket industry in which we operate. For more information on our segments, refer to Note 8, "Segment Information" to the Consolidated Financial Statements.

Effective October 4, 2022, the Company's Board approved a change in Dorman’s fiscal year end from the last Saturday in December of each year to December 31 of each year, to commence with the fiscal year ending on December 31, 2022.

Principles of Consolidation. The Consolidated Financial Statements include our accounts and the accounts of our wholly owned subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.

Use of Estimates in the Preparation of Financial Statements. The preparation of financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Cash and Cash Equivalents. We consider all highly liquid short-term investments with original maturities of three months or less to be cash equivalents.

Sales of Accounts Receivable. We have entered into several customer-sponsored programs administered by unrelated financial institutions that permit us to sell certain accounts receivable at discounted rates to the financial institutions. Transactions under these programs were accounted for as sales of accounts receivable and were removed from our Consolidated Balance Sheet at the time of the sales transactions. Sales of accounts receivable under these agreements, and related factoring costs, which were including in selling, general and administrative expenses, were as follows:


(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Sales of accounts receivable	$	949,517	$	1,048,671	$	935,770
Factoring costs	$	50,231	$	37,188	$	11,704

Inventories. Inventories are stated at the lower of cost or net realizable value. Cost is determined by the first-in, first-out method. Inventories include the cost of material, freight, direct labor and overhead utilized in the processing of our products. We provide reserves for discontinued and excess inventory based upon historical demand, forecasted usage, estimated customer requirements and product line updates.

Property, Plant and Equipment. Property, plant and equipment are recorded at cost and depreciated over the estimated useful lives, which range from 1 to 39 years, using the straight-line method for financial statement reporting purposes and accelerated methods for income tax purposes. The costs of maintenance and repairs are expensed as incurred. Renewals and betterments are capitalized. Gains and losses on disposals are included in operating results.

Estimated useful lives by major asset category are as follows:


Buildings and building improvements			10 to 39 years
Machinery, equipment and tooling			3 to 10 years
Software and computer equipment			3 to 10 years
Furniture, fixtures and leasehold improvements			1 to 39 years

Long-Lived Assets Including Goodwill and Other Acquired Intangible Assets. Long-lived assets, including property, plant, and equipment and amortizable identifiable intangibles, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. The impairment review is a two-step process. First, recoverability is measured by comparing the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount exceeds the estimated undiscounted future cash flows, the second step of the impairment test is performed, and an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds its fair value. The assets and liabilities of a disposal group classified as held for sale would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and would no longer be depreciated.

Goodwill is reviewed for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value of the goodwill may be impaired. For the annual test, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount (“Step 0”). If through the Step 0 test we determine it is more likely than not that the fair value of a reporting unit is less than its carrying amount or if the Company elects to not perform Step 0), then we would perform a quantitative test (“Step 1”) to determine whether an impairment charge was necessary. During fiscal 2023, we elected to perform a Step 1 test of our goodwill for the dual purpose of assessing goodwill for impairment and reallocating goodwill to reporting units, using a representative fair value allocation, as part of reorganizing our reporting structure. See Note 8, "Segment Information" for additional information on the reorganization of our reporting structure. During fiscal 2022, we assessed the qualitative factors which could affect the fair values of our reporting units. For both fiscal 2023 and fiscal 2022, we determined that it was not more likely than not that the fair value of our reporting units were less than their carrying amounts.

Purchase Accounting. The purchase price of an acquired business is allocated to the underlying tangible and intangible assets acquired and liabilities assumed based upon their respective fair market values, with the excess recorded as goodwill. Such fair market value assessments require judgments and estimates which may change over time and may cause the final amounts to differ materially from their original estimates. These adjustments to fair value assessments are recorded to goodwill over the purchase price allocation period which cannot exceed 12 months from the date of acquisition.

Other Assets. Other assets include primarily long-term core inventory, deposits, and equity method investments.

Certain products we sell contain parts that can be recycled, or as more commonly referred to in our industry, remanufactured. We refer to these parts as cores. A used core is remanufactured and sold to the customer as a replacement for a unit inside a vehicle. Customers and end-users that purchase remanufactured products will generally return the used core to us, which we then use in the remanufacturing process to make another finished good. Our core inventory consists of used cores purchased and held in our facilities, used cores that are in the process of being returned from our customers and end-users, and remanufactured cores held in finished goods inventory at our facilities. Our products that utilize a core primarily include instrument clusters, hybrid batteries, radios, and climate control modules.

Long-term core inventory was $20.0 million and $19.8 million as of December 31, 2023 and December 31, 2022, respectively. Long-term core inventory is recorded at the lower of cost or net realizable value. Cost is determined based on actual purchases of core inventory. We believe that the most appropriate classification of core inventory is a long-term asset. According to guidance provided under the Financial Accounting Standards Board ("FASB") Accounting Standards Codification, current assets are defined as “assets or resources commonly identified as those which are reasonably expected to be realized in cash or sold or consumed during the normal operating cycle of the business.” The determination of the long-term classification is based on our view that the value of the cores is not expected to be consumed or realized in cash during our normal annual operating cycle.

We have investments that we account for according to the equity method of accounting. The total book value of these investments was $10.8 million and $9.4 million at December 31, 2023 and December 31, 2022,

respectively. These investments provided $5.7 million, $5.5 million and $4.6 million of income during fiscal 2023, fiscal 2022, and fiscal 2021, respectively, and were included in the Light Duty segment income from operations. Additionally, we have an investment that we account for according to the cost method of accounting. The carrying book value of this investment was $5.0 million as of both December 31, 2023 and December 31, 2022.

Other Accrued Liabilities. Other accrued liabilities include primarily accrued commissions, accrued income taxes, insurance liabilities, and other current liabilities.

Revenue Recognition and Accrued Customer Rebates and Returns. Revenue is recognized from product sales when goods are shipped, title and risk of loss and control have been transferred to the customer and collection is reasonably assured. We record estimates for cash discounts, defective and slow-moving product returns, promotional rebates, core return deposits, and other discounts in the period of the sale ("Customer Credits"). The provision for Customer Credits is recorded as a reduction from gross sales and reserves for Customer Credits are shown as an increase of accrued customer rebates and returns, which is included in current liabilities. Customer Credits are estimated based on contractual provisions, historical experience, and our assessment of current market conditions. Actual Customer Credits have not differed materially from estimated amounts. Amounts billed to customers for shipping and handling are included in net sales. Costs associated with shipping and handling are included in cost of goods sold.

As noted above, Customer Credits include core return deposits which are an estimate of the amount we believe we will refund to our customers when used cores are returned to us. The price we invoice to customers for remanufactured cores contains both the amount we charge to remanufacture the part and a deposit for the core. We charge a core deposit to encourage the customer to return the used core to us so that it can be used in our remanufacturing process. We allow our customers up to twenty-four months to return the used core to us. Core return deposits are reserved based on the expected deposits to be issued to customers based on historical returns.

Research and Development. Research and development costs are expensed as incurred. Research and development costs totaling $32.3 million, $24.8 million and $23.1 million have been recorded in selling, general and administrative expenses in the Consolidated Statements of Operations for fiscal 2023, fiscal 2022, and fiscal 2021, respectively.

Stock-Based Compensation. At December 31, 2023, we had awards outstanding under a stock-based employee compensation plan, which is described more fully in Note 13, "Capital Stock." We record compensation expense for all awards granted. The value of restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) issued was based on the fair value of our common stock on the grant date. The fair value of performance-based RSUs, for which the performance measure is total shareholder return, is determined using a Monte Carlo simulation model. The fair value of stock options granted is determined using the Black-Scholes option valuation model on the grant date.

Income Taxes. We follow the asset and liability method of accounting for deferred income taxes. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities. Deferred tax assets or liabilities at the end of each period are determined using the enacted tax rate expected to be in effect when taxes are paid or recovered.

Unrecognized income tax benefits represent income tax positions taken on income tax returns that have not been recognized in the consolidated financial statements. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50%) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Additionally, we accrue interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws. Interest and penalties are classified as income tax expense in the Consolidated Statements of Operations.

Concentrations of Risk. Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash equivalents and accounts receivable. All cash equivalents are managed within

established guidelines that limit the amount that may be invested with one issuer. A significant percentage of our accounts receivable have been, and will continue to be, concentrated among a relatively small number of automotive retailers and warehouse distributors in the United States. Our 4 largest customers accounted for 74% and 69% of net accounts receivable as of December 31, 2023 and December 31, 2022, respectively. We continually monitor the credit terms and credit limits for these and other customers.

In fiscal 2023 and fiscal 2022, approximately 70% and 64%, respectively, of our products were purchased from suppliers in a variety of non-U.S. countries, with the largest portion of our overseas purchases being made in China.

Fair Value Disclosures. The carrying value of financial instruments such as cash and cash equivalents, accounts receivable, accounts payable, and other current assets and liabilities approximate their fair value based on the short-term nature of these instruments. The carrying value of our long-term debt approximates its fair value because it bears interest at a rate indexed to a market rate (Term SOFR). Additionally, the fair value of assets acquired and liabilities assumed are determined at the date of acquisition. Contingent consideration associated with an acquisition is recorded at fair value at the acquisition date and is adjusted to fair value at each reporting period.

Recent Accounting Pronouncements. In November 2023, the FASB issued Accounting Standards Update (“ASU”) 2023-07, Improvements to Reportable Segment Disclosures. The ASU requires additional disclosures about reportable segments’ significant expenses on an interim and annual basis. The ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024 on a retrospective basis.

In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures. The ASU expands disclosures in the income tax rate reconciliations table and cash taxes paid and is effective for annual periods beginning after December 15, 2024.

We expect to implement these new standards by their effective dates, and do not expect their adoption to have an impact on our results of operations, financial condition or cash flows.

2. Business Acquisitions and Investments

Super ATV, LLC (“SuperATV”)

On October 4, 2022, Dorman acquired 100% of the issued and outstanding equity interests of SuperATV (the “Transaction”), for aggregate consideration of $509.8 million (net of $6.8 million cash acquired), plus a potential earn-out payment to the sellers of SuperATV not to exceed $100 million in the aggregate, subject to the achievement by SuperATV of certain revenue and gross margin targets in the years ended December 31, 2023 and December 31, 2024. See Note 11, "Commitments and Contingencies," for additional information on contingent consideration associated with the Transaction. In the year ended December 31, 2023, we received $0.3 million in cash as proceeds from the closing net working capital adjustments. SuperATV is a leading independent supplier to the powersports aftermarket with a family of highly respected brands spanning functional accessories and upgrades, as well as replacement parts for specialty vehicles.

The Transaction was funded in cash through the refinancing of our existing credit facility discussed further in Note 7, "Long-Term Debt."

The Transaction was accounted for as a business combination under the acquisition method of accounting. We have allocated the purchase price to tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. Our purchase price allocation for SuperATV assets acquired and liabilities assumed was complete as of September 30, 2023.

The table below details the fair values of the assets acquired and the liabilities assumed at the acquisition date:


(in thousands)
Accounts receivable	$	3,317
Inventories	90,428
Prepaids and other current assets	5,293
Property, plant and equipment	23,776
Goodwill	247,474
Identifiable intangible assets	157,500
Operating lease right-of-use assets	11,661
Other Assets	3,001
Accounts payable	(7,436)
Accrued compensation	(2,086)
Accrued customer rebates and returns	(1,609)
Other current liabilities	(8,726)
Long-term operating lease liabilities	(9,508)
Other long-term liabilities	(3,307)
Net cash consideration	509,778

The valuation of the intangible assets acquired, and related amortization periods are as follows:


(in thousands)	Fair Value		Amortization Period (in years)
Product portfolio	82,500		15
Trade names	48,400		20
Customer relationships	26,600		15
Total	$	157,500

The fair values assigned to the product portfolio and customer relationships were estimated by discounting expected cash flows based on the multi-period excess earnings valuation methodology, and the trade names were estimated by discounting expected cash flows based on the relief from royalty methodology. The product portfolio valuation method relies on various management judgments, including expected future cash flows resulting from the product portfolio, technology obsolescence rates, contributory effects of other assets utilized in the business, discount rates and other factors. The trade names valuation method relies on various management judgments, including royalty rates, discount rates and other factors. The customer relationship valuation method relies on various management judgments, including expected future cash flows resulting from existing customer relationships, customer attrition rates, contributory effects of other assets utilized in the business, discount rates, and other factors.

As of December 31, 2023, the total amount of goodwill resulting from the SuperATV acquisition that is expected to be deductible for tax purposes is estimated at $400.5 million.

The financial results of the Transaction have been included in the consolidated financial statements from the date of acquisition. The net sales and net income of SuperATV included in the consolidated financial statements for the fiscal year ended December 31, 2022 were $49.6 million and $2.3 million, respectively.

The unaudited pro forma information for the periods set forth below gives effect to the Transaction as if it had occurred as of December 26, 2020, the beginning of the fiscal 2021 period.

The pro forma information is presented for informational purposes only and is not necessarily indicative of the results of operations that would have been achieved had the acquisition been consummated as of that time.


	For the Year Ended
(in thousands, except per share data, unaudited)	December 31, 2022		December 25, 2021
Net sales	$	1,888,379	$	1,556,360
Net income	$	130,375	$	143,419
Diluted earnings per share	$	4.13	$	4.49

The fiscal 2022 unaudited pro forma net income set forth above was adjusted to exclude the impact of acquisition date fair value adjustments to inventory, and to also remove acquisition-related transaction costs. The 2021 unaudited pro forma net income was adjusted to include the impact of these items.

DPL Holding Corporation (“Dayton Parts”)

On August 10, 2021, we acquired 100% of the equity interests of Dayton Parts, a manufacturer of chassis and other parts designed to serve the heavy-duty vehicle sector of the aftermarket for a purchase price of $344.9 million in cash (net of $8.8 million of acquired cash), after certain customary post-acquisition purchase price adjustments.

The acquisition was funded by cash on hand as well as through the refinancing of our revolving credit facility discussed further in Note 7, "Long-Term Debt."

The transaction was accounted for as a business combination under the acquisition method of accounting. We have allocated the purchase price to tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values.

During the year ended December 25, 2021, we recorded measurement and period adjustments of approximately $2.1 million to decrease goodwill, $0.6 million to decrease the purchase price due to customary net working capital adjustments, $0.1 million to increase other current liabilities, and $1.6 million to decrease deferred tax liabilities. Our measurement period adjustments for Dayton Parts were complete as of December 25, 2021.

The table below details the fair values of the assets acquired and the liabilities assumed at the acquisition date, including applicable measurement period adjustments:


(in thousands)
Accounts receivable	$	23,216
Inventories	79,625
Prepaids and other current assets	2,302
Property, plant and equipment	29,900
Goodwill	106,816
Identifiable intangible assets	160,400
Operating lease right-of-use assets	21,248
Other assets	848
Accounts payable	(11,970)
Accrued compensation	(2,784)
Other current liabilities	(7,604)
Long-term operating lease liabilities	(18,444)
Deferred tax liabilities	(38,665)
Net cash consideration	$	344,888

The estimated valuation of the intangible assets acquired, and related amortization periods are as follows:


(in thousands)	Fair Value		Amortization Period (in years)
Customer relationships	$	124,100	20
Product portfolio	25,300		20
Trade names	11,000		10
Total	$	160,400

The fair values assigned to intangible assets were estimated by discounting expected cash flows based on the relief from royalty and multi-period excess earnings valuation methodologies. These valuation methods rely on management judgment, including expected future cash flows resulting from existing customer relationships, customer attrition rates, contributory effects of other assets utilized in the business, royalty rates and other factors.

The goodwill recognized is attributable primarily to strategic and synergistic opportunities related to the Company’s and Dayton Parts’ existing automotive aftermarket businesses, the assembled workforce of Dayton Parts and other factors. The goodwill is not expected to be deductible for tax purposes.

The financial results of the acquisition have been included in the consolidated financial statements from the date of acquisition. The net sales and net income of Dayton Parts included in the consolidated financial statements for the fiscal year ended December 25, 2021 were $78.0 million and $0.0 million, respectively.

The unaudited pro forma information for the periods set forth below gives effect to the Dayton Parts acquisition as if it had occurred as of December 28, 2019, the beginning of the fiscal 2020 period.


	For the Year Ended
(in thousands, except per share data, unaudited)	December 25, 2021
Net sales	$	1,468,415
Net income	$	147,090
Diluted earnings per share	$	4.60

The fiscal 2021 unaudited pro forma net income set forth above was adjusted to exclude the impact of acquisition date fair value adjustments to inventory, and to also remove acquisition-related transaction costs.

3. Inventories

Inventories were as follows:


(in thousands)	December 31, 2023		December 31, 2022
Raw materials	$	29,750	$	34,267
Bulk product	211,805		234,871
Finished product	387,668		478,032
Packaging materials	8,152		8,731
Total	$	637,375	$	755,901

4. Property, Plant and Equipment

Property, plant and equipment include the following:


(in thousands)	December 31, 2023		December 31, 2022
Buildings	$	62,434	$	59,980
Machinery, equipment and tooling	208,086		184,184
Furniture, fixtures and leasehold improvements	17,083		12,225
Software and computer equipment	113,148		100,814
Total	400,751		357,203
Less-accumulated depreciation and amortization	(240,638)		(208,726)
Property, plant and equipment, net	$	160,113	$	148,477

Depreciation and amortization expenses associated with property, plant, and equipment were $31.9 million, $28.6 million, and $26.3 million in fiscal 2023, fiscal 2022, and fiscal 2021, respectively.

5. Leases

We determine whether an arrangement is a lease at inception. This determination generally depends on whether the arrangement conveys the right to control the use of an identified fixed asset explicitly or implicitly for a period of time in exchange for consideration. Control of an underlying asset is conveyed if we obtain the rights to direct the use of the asset and to obtain substantially all of the economic benefit from its use. We have operating leases for distribution centers, sales offices and certain warehouse and office equipment. Our operating leases have remaining lease terms of 1 to 10 years, many of which include one or more renewal options. We consider these renewal options in determining the lease term used to establish our right-of-use assets and lease liabilities when it is determined that it is reasonably certain that the renewal option will be exercised. Substantially all of our equipment leases and some of our real estate leases have terms of less than one year. Some of our operating lease agreements include variable lease costs, primarily taxes, insurance, common area maintenance or increases in rental costs related to inflation.

Operating leases are included in the right-of-use lease assets, other current liabilities and long-term lease liabilities on the Consolidated Balance Sheet. Right-of-use assets and lease liabilities are recognized at each lease’s commencement date based on the present values of its lease payments over its respective lease term. When a borrowing rate is not explicitly available for a lease, our incremental borrowing rate is used based on information available at the lease’s commencement date to determine the present value of its lease payments. The incremental borrowing rate is not commonly quoted and is derived through a combination of inputs including our credit rating and the impact of full collateralization. The incremental borrowing rate is based on our collateralized borrowing capabilities over a similar term to the lease payments. We utilized the consolidated group borrowing rate for all leases as we operate a centralized treasury operation. Operating lease payments are recognized on a straight-line basis over the lease term. We had no material finance leases as of December 31, 2023 or December 31, 2022.

Practical Expedients and Accounting Policy Elections

We have made certain accounting policy elections and are using certain practical expedients permitted under GAAP, as follows:

•Include both lease and non-lease components as a single lease component, as non-lease components of contracts have not historically been material.

•Account for leases with terms of one year or less as short-term leases and, as such, are not included in the right-of-use assets or lease liabilities.

As of December 31, 2023 and December 31, 2022 there were no material variable lease costs or sublease income. Cash paid for operating leases was $21.2 million, $16.8 million and $9.2 million during fiscal

2023, fiscal 2022 and fiscal 2021, respectively, which are classified in operating activities on the Consolidated Statements of Cash Flows. The following table summarizes the lease expense:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Operating lease expense	$	21,747	$	17,340	$	9,549
Short-term lease expense	7,169		5,838		3,172
Total lease expense	$	28,916	$	23,178	$	12,721

Supplemental balance sheet information related to our operating leases is as follows:


(in thousands)	December 31, 2023			December 31, 2022
Operating lease right-of-use assets	$	103,476		$	109,977

Other accrued liabilities	$	16,917		$	15,912
Long-term operating lease liabilities	91,262			98,221
Total operating lease liabilities	$	108,179		$	114,133

Weighted average remaining lease term (years)	6.85			7.76
Weighted average discount rate	4.20		%	3.91		%

The following table summarizes the maturities of our lease liabilities for all operating leases as of December 31, 2023:


(in thousands)	December 31, 2023
2024	$	21,061
2025	19,785
2026	19,659
2027	17,802
2028	11,705
Thereafter	34,003
Total lease payments	124,015
Less: Imputed interest	(15,836)
Present value of lease liabilities	$	108,179

6. Goodwill and Intangible Assets

Goodwill

Goodwill included the following:


(in thousands)	Light Duty		Heavy Duty		Specialty Vehicle		Consolidated
Balance at December 25, 2021	$	—	$	—	$	—	$	197,332
Goodwill acquired	—		—		—		247,247
Foreign currency translation	—		—		—		(1,544)
Balance at December 31, 2022	—		—		—		443,035
Measurement period adjustments	—		—		—		233
Reporting structure reorganization (see Note 8)	313,704		56,637		72,309		—
Foreign currency translation	—		—		—		621
Balance at December 31, 2023	$	313,704	$	56,637	$	72,309	$	443,889

Intangible Assets

Intangible assets, subject to amortization, included the following:


		December 31, 2023						December 31, 2022
Intangible assets subject to amortization	Weighted Average Amortization Period (years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
(dollars in thousands)
Customer relationships	16.2	$	175,430	$	31,678	$	143,752	$	175,430	$	21,643	$	153,787
Trade names	14.9	67,690		10,676		57,014		67,690		6,370		61,320
Product Portfolio	14.6	107,800		9,720		98,080		107,800		2,953		104,847
Technology	4.7	2,167		1,069		1,098		2,167		820		1,347
Patents and Other	6.6	2,230		618		1,612		1,430		322		1,108
Total		$	355,317	$	53,761	$	301,556	$	354,517	$	32,108	$	322,409

Amortization expense associated with intangible assets was $22.1 million, $14.2 million and $6.5 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively. The estimated future amortization expense for intangible assets as of December 31, 2023, is summarized as follows:


(in thousands)
2024	$	22,131
2025	21,998
2026	20,867
2027	20,178
2028	20,004
Thereafter	196,378
Total	$	301,556

7. Long-Term Debt

On August 10, 2021, in connection with the acquisition of Dayton Parts, we entered into a new credit agreement that provided for a $600 million revolving credit facility, including a letter of credit sub-facility of up to $60 million (the “2021 Facility”). The 2021 Facility replaced our previous $100 million revolving credit facility. The 2021 Facility was scheduled to mature on August 10, 2026 and was guaranteed by the Company’s material domestic subsidiaries (together with the Company, the “Credit Parties”) and was supported by a security interest in substantially all of the Credit Parties’ personal property and assets, subject to certain exceptions.

In connection with the acquisition of SuperATV, we amended and restated the 2021 Facility (as amended and restated, the “New Facility”) by and among us, the lenders from time to time party thereto, and the administrative agent. In addition to including the existing $600.0 million revolving facility, the New Facility includes a $500.0 million term loan, which was used to fund the SuperATV acquisition. The New Facility (including the revolving portion of the New Facility) matures on October 4, 2027, is guaranteed by the Credit Parties and is supported by a security interest in substantially all of the Credit Parties’ personal property and assets, subject to certain exceptions.

Borrowings under the New Facility bear interest at a rate per annum equal to, at our option, either a term Secured Overnight Financing Rate (“Term SOFR”) (subject to a 0.00% floor) or a base rate (as defined in the New Facility), in each case plus an applicable margin of, initially (i) in the case of Term SOFR loans, 1.50% or (ii) in the case of base rate loans, 0.50%. The applicable margin for (i) base rate loans ranges from 0.000% to 1.000% per annum and (ii) for Term SOFR loans ranges from 1.000% to 2.000% per annum, in each case, based on the Total Net Leverage Ratio (as defined in the New Facility). The commitment fee under the New Facility is initially equal to 0.20% and thereafter ranges from 0.125% to 0.250% based on the Total Net Leverage Ratio (as defined in the New Facility). As of December 31, 2023, the interest rate on the outstanding borrowings under the New Facility was 6.96% and the commitment fee was 0.15%.

The term loan portion of the New Facility contains mandatory repayment provisions that require quarterly principal amortization payments on the term loan equal to a defined percentage of the initial borrowing amount of $500.0 million as follows, with the balance payable upon maturity in October 2027:


Fiscal Quarter Ending			Principal Amortization Payment Percentage
December 31, 2022 through September 24, 2024			0.625
December 31, 2024 through September 30, 2025			1.25
December 31, 2025 through September 30, 2027			1.875

The New Facility contains affirmative and negative covenants, including, but not limited to, covenants regarding capital expenditures, share repurchases, and financial covenants related to the ratio of consolidated interest expense to consolidated EBITDA and the ratio of total net indebtedness to consolidated EBITDA, each as defined by the New Facility. As of December 31, 2023, we were not in default of the covenants contained in the New Facility.

8. Segment Information

Effective beginning the fourth quarter of 2023, the Company reorganized its management and reporting into three segments: Light Duty, Heavy Duty and Specialty Vehicle. These segments realign our business along the three sectors of the motor vehicle aftermarket in which we operate and help support the continued growth of the Company following several acquisitions. The Light Duty segment designs and markets replacement parts and fasteners primarily for passenger cars and light-duty trucks with sales to retailers and wholesale distributors who primarily serve passenger car and light-duty truck customers. The Heavy Duty segment designs and markets replacement parts primarily for medium- and heavy-duty vehicles with sales to independent distributors, independent component specialists and rebuilders, and auto parts stores who focus on the heavy-duty market. The Specialty Vehicle segment designs, markets and manufactures aftermarket parts and accessories for the powersports market with sales through direct-to-consumer, dealers and installers.

We measure segment profit based on income from operations excluding acquisition-related intangible assets amortization, acquisition-related transaction and other costs, and other special charges. Segment assets consist of inventories, accounts receivable, and property, plant and equipment, net. Intersegment sales are not material.

Segment results are as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Net Sales:
Light Duty	$	1,462,474	$	1,425,892	$	1,247,465
Heavy Duty	256,913		258,215		97,784
Specialty Vehicle	210,401		49,642		—
Total	$	1,929,788	$	1,733,749	$	1,345,249

Income from operations:
Light Duty	187,159		169,579		182,020
Heavy Duty	14,505		29,738		10,942
Specialty Vehicle	31,618		8,537		—
Total	$	233,282	$	207,854	$	192,962

Depreciation:
Light Duty	$	25,239	$	25,062	$	25,296
Heavy Duty	3,239		2,772		1,034
Specialty Vehicle	3,420		798		—
Total	$	31,898	$	28,632	$	26,330

Capital Expenditures:
Light Duty	$	33,445	$	31,682	$	19,016
Heavy Duty	3,581		4,769		824
Specialty Vehicle	6,942		1,432		—
Total	$	43,968	$	37,883	$	19,840

Segment Assets:
Light Duty	$	1,083,347	$	1,047,987	$	988,371
Heavy Duty	162,583		177,557		131,245
Specialty Vehicle	78,424		106,219		—
Total	$	1,324,354	$	1,331,763	$	1,119,616

A reconciliation of segment adjusted operating income to consolidated income before taxes is as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Segment income from operations	$	233,282	$	207,854	$	192,962
Acquisition-related intangible assets amortization	(21,817)		(14,070)		(6,340)
Acquisition-related transaction and other costs	(15,373)		(22,736)		(15,071)
Fair value adjustment to contingent consideration	20,469		—		—
Executive transition services expenses	(1,801)		—		—
Interest expense, net	(48,061)		(15,582)		(2,162)
Other income, net	1,804		735		377
Consolidated income before income taxes	$	168,503	$	156,201	$	169,766

A reconciliation of segment assets to consolidated assets is as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Segment assets	$	1,324,354	$	1,331,763	$	1,119,616
Other current assets	69,468		85,834		71,830
Other non-current assets	898,585		924,189		481,673
Consolidated assets	$	2,292,407	$	2,341,786	$	1,673,119

9. Related Party Transactions

Prior to December 1, 2023, we leased our Colmar, PA facility from an entity in which Steven L. Berman, our Non-Executive Chairman, and certain of his family members are owners. On December 1, 2023, the Colmar facility was sold to a third party, subject to our lease. We also lease a portion of our Lewisberry, PA facility from an entity in which Mr. Berman, and certain of his family members are owners. Each lease is a non-cancelable operating lease and expires December 31, 2027. Total rental payments to those entities under these lease arrangements were $2.9 million, $2.5 million, and $2.3 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively.

During fiscal 2023 and for the period subsequent to our acquisition of Super ATV in fiscal 2022, we leased our facilities in Madison, IN and Shreveport, LA, from entities in which Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicles, and certain of her family members are owners. Each lease is a non-cancelable operating lease. Total rental payments to those entities under these lease arrangements were $2.6 million in fiscal 2023 and $0.5 million in fiscal 2022. The leases for our operating facilities in Madison, IN and Shreveport, LA were renewed in October 2022 in connection with the acquisition of SuperATV and will expire on October 31, 2027.

During fiscal 2023 and for the period subsequent to our acquisition of SuperATV in fiscal 2022, we had a warehouse storage and services agreement with a counterparty that is majority-owned by a family member of Ms. Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicle. The agreement provides for indoor storage space and material handling services at agreed-upon rates. Total payments under the arrangement were $0.2 million in fiscal 2023 and less than $0.1 million in fiscal 2022. The agreement was signed in October 2020 and expired in October 2023, but was extended on a month-to-month basis.

We are a partner in a joint venture with one of our suppliers and own a minority interest in two other suppliers. Purchases from these companies were $22.7 million, $24.9 million and $18.9 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively.

10. Income Taxes

The components of the income tax provision (benefit) are as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Current:
Federal	$	34,600	$	31,683	$	43,374
State	5,602		7,141		5,755
Foreign	2,002		1,708		1,075
	42,204		40,532		50,204
Deferred:
Federal	(1,936)		(4,003)		(9,609)
State	(338)		(1,022)		(1,368)
Foreign	(686)		(855)		(993)
	(2,960)		(5,880)		(11,970)
Total	$	39,244	$	34,652	$	38,234

The following is a reconciliation of income taxes at the statutory tax rate to the Company's effective tax rate:


	For the Year Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Federal taxes at statutory rate	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.6		2.7		2.1
Research and development tax credit	(0.7)		(0.7)		(0.4)
Federal permanent items	0.3		(0.2)		—
Effect of foreign operations	0.3		—		(0.2)
Other	(0.2)		(0.6)		—
Effective tax rate	23.3	%	22.2	%	22.5	%

At December 31, 2023, we had $4.5 million of unrecognized tax benefits, all of which would affect our effective tax rate if recognized.

The following table summarizes the change in unrecognized tax benefits for the three years ended December 31, 2023:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Balance at beginning of year	$	3,856	$	1,204	$	1,060
Reductions due to lapses in statutes of limitations	(716)		(139)		—
Reductions due to tax positions settled	—		—		—
Additions related to positions taken during a prior period	—		2,136		—
Reductions due to reversals of prior year positions	—		—		(30)
Additions based on tax positions taken during the current period	1,399		655		174
Balance at end of year	4,539		3,856		1,204

We recognize interest and penalties related to unrecognized tax benefits in income tax expense. As of December 31, 2023, accrued interest and penalties related to unrecognized tax benefits were immaterial. The Company does not anticipate material changes in the amount of unrecognized income tax benefits over the next year.

Deferred income taxes result from timing differences in the recognition of revenue and expense between tax and financial statement purposes. The sources of temporary differences are as follows:


(in thousands)	December 31, 2023		December 31, 2022
Assets:
Inventories	$	17,829	$	13,662
Accounts receivable	20,472		20,446
Operating lease liability	26,261		24,904
Accrued expenses	19,265		12,526
Net operating losses	289		1,285
Foreign tax credits	469		469
State tax credits	379		403
Capital loss carryforward	478		481
Total deferred tax assets	85,442		74,176
Valuation allowance	(1,354)		(1,377)
Net deferred tax assets	84,088		72,799
Liabilities:
Depreciation	16,481		18,132
Goodwill and intangible assets	49,798		41,693
Operating lease right of use asset	25,142		23,924
Other	1,592		876
Gross deferred tax liabilities	93,013		84,625
Net deferred tax (liabilities) assets	$	(8,925)	$	(11,826)

A valuation allowance, if needed, reduces deferred tax assets to the amount expected to be realized. When determining the amount of net deferred tax assets that are more likely than not to be realized, the Company assesses all positive and negative evidence. This evidence includes, but is not limited to, prior earnings history, expected future earnings, carryback and carryforward periods and the feasibility of ongoing tax strategies that could potentially enhance the likelihood of the realization of the deferred tax asset. Management has determined it was necessary to establish a valuation allowance against the foreign tax credits, various state tax credits and a capital loss carryforward.

Based on our history of taxable income and our projection of future earnings, we believe that it is more likely than not that sufficient taxable income will be generated in the foreseeable future to realize the remaining net deferred tax assets.

During 2023, we reduced the valuation allowance against the deferred tax assets noted above by an immaterial amount.

As of December 31, 2023, the Company has tax-effected net operating loss carryforwards of $0.2 million and $0.1 million for U.S. federal and state jurisdictions, respectively. Tax-effected federal net operating losses of $0.1 million begin to expire in 2036. The remaining federal net operating losses do not expire. The state net operating loss carryforwards expire in various years starting in 2037.

We file income tax returns in the United States, Canada, China, India, and Mexico. The statute of limitations for tax years before 2020 is closed for U.S. federal income tax purposes. The statute of limitations for tax years before 2017 is closed for the states in which we file. The statute of limitations for tax years before 2020 is closed for income tax purposes in Canada, China, and India. The statute of limitations for tax years before 2018 is closed for income tax purposes in Mexico.

11. Commitments and Contingencies

Shareholders’ Agreement. A shareholders’ agreement was entered into in September 1990 and amended and restated on July 1, 2006. Under the agreement, each of the late Richard Berman, Steven Berman,

Jordan Berman, Marc Berman, Fred Berman, Deanna Berman and additional shareholders named in the agreement has, among other things, granted the others of them rights of first refusal, exercisable on a pro-rata basis or in such other proportions as the exercising shareholders may agree, to purchase shares of our common stock which any of them, or upon their deaths their respective estates, proposes to sell to third parties. We have agreed with these shareholders that, upon their deaths, to the extent that any of their shares are not purchased by any of these surviving shareholders and may not be sold without registration under the Securities Act of 1933, as amended (the "1933 Act"), we will use our best efforts to cause those shares to be registered under the 1933 Act. The expenses of any such registration will be borne by the estate of the deceased shareholder. The additional shareholders that are a party to the agreement are trusts affiliated with the late Richard Berman, Steven Berman, Jordan Berman, Marc Berman or Fred Berman, or each person’s respective spouse or children.

Acquisitions. We have contingent consideration related to an acquisition due to the uncertainty of the ultimate amount of any payments that will become due as earnout payments if performance targets are achieved. If the remaining performance targets for the acquisition are fully achieved, the maximum additional contingent payments to be made under the transaction documents would be $102.0 million in the aggregate.

As of December 31, 2023 and December 31, 2022, we accrued $0.0 million and $20.0 million, respectively, representing the fair value of the estimated payments that we expect could become due in connection with the transaction. For the year ended December 31, 2023, we recorded a net decrease of $20.0 million to the contingent consideration liability, comprising a $20.5 million decrease in fair value based on the modeling of a range of performance outcomes relative to the achievement of targets established in the purchase agreement, partially offset by $0.5 million of accretion on the liability resulting from the passage of time. The net benefit was included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations.

For the year ended December 31, 2022, we recorded a charge of $1.8 million in connection with earnout provisions under a prior acquisition, with the charge included in Selling, General and Administration expenses. During the year ended December 31, 2022, we paid $1.8 million to fully settle this earnout provision associated with the prior acquisition.

Other Contingencies. We are a party to or otherwise involved in legal proceedings that arise in the ordinary course of business, such as various claims and legal actions involving contracts, employment claims, competitive practices, intellectual property infringement, product liability claims and other matters arising out of the conduct of our business. In the opinion of management, none of the actions, individually or in the aggregate, taking into account relevant insurance coverage, would likely have a material financial impact on the Company and we believe the range of reasonably possible losses from current matters, taking into account relevant insurance coverage, is immaterial. However, legal matters are subject to inherent uncertainties and there exists the possibility that the ultimate resolution of any of these matters could have a material adverse impact on the Company’s cash flows, financial position and results of operations in the period in which any such effects are recorded.

12. Revenue Recognition

Our primary source of revenue is from contracts with and purchase orders from customers. In most instances, our contract with a customer is the customer’s purchase order. Upon acceptance of the purchase order, a contract exists with a customer as a sales agreement indicates the approval and commitment of the parties, identifies the rights of both parties, identifies the payment terms, and has commercial substance. At this point, we believe it is probable that we will collect the consideration to which we will be entitled in exchange for the goods transferred to the customer.

For certain customers, we may also enter into a sales agreement that outlines pricing considerations as well as the framework of terms and conditions which apply to future purchase orders for that customer. In these situations, our contract with the customer is both the sales agreement as well as the specific customer purchase order. As our contract with a customer is typically for a single transaction or customer purchase order, the duration of the contract is typically one year or less. As a result, we have elected to apply certain practical expedients and omit certain disclosures of remaining performance obligations for contracts that have an initial term of one year or less as permitted by GAAP.

Revenue is recognized from product sales when goods are shipped, title and risk of loss and control have been transferred to the customer, and collection is reasonably assured. We estimate the transaction price at the inception of a contract or upon fulfilling a purchase order, including any variable consideration, and will update the estimate for changes in circumstances.

We record estimates for cash discounts, defective and slow-moving product returns, promotional rebates, core return deposits and other discounts in the period the related product revenue is recognized (“Customer Credits”). The provision for Customer Credits is recorded as a reduction from gross sales and reserves for Customer Credits are shown as an increase in accrued customer rebates and returns. Customer Credits are estimated based on contractual provisions, historical experience, and our assessment of current market conditions. Actual Customer Credits have not differed materially from estimated amounts for each period presented. Amounts billed to customers for shipping and handling are included in net sales. Costs associated with shipping and handling are included in cost of goods sold. We have concluded that our estimates of variable consideration are not constrained according to the definition in the standard.

All of our revenue was recognized under the point of time approach during fiscal 2023, fiscal 2022 and fiscal 2021. Also, we do not have significant financing arrangements with our customers. Our credit terms are all less than one year. Lastly, we do not receive noncash consideration (such as materials or equipment) from our customers to facilitate the fulfillment of our contracts.

Practical Expedients and Accounting Policy Elections

We have made certain accounting policy elections and are using certain practical expedients permitted under GAAP, as follows:

•Do not adjust the promised amount of consideration for the effects of a significant financing component as we expect, at contract inception, that the period between when we transfer a promised good or service to the customer and when the customer pays for that good or service will be one year or less.

•Expense costs to obtain a contract as incurred when the expected period of benefit, and therefore the amortization period, is one year or less.

•Exclude from the measurement of the transaction price all taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction and collected by the entity for a customer, including sales, use, value-added, excise and various other taxes.

•Account for shipping and handling activities that occur after the customer has obtained control of a good as a fulfillment activity rather than a separate performance obligation.

Disaggregated Revenue

For disaggregation of net sales by operating segments, refer to Note 8, "Segment Information", to the Consolidated Financial Statements.

The following table presents our disaggregated net sales by geography.


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Net Sales to U.S. Customers	$	1,772,092	$	1,606,472	$	1,269,050
Net Sales to Non-U.S. Customers	157,696		127,277		76,199
Net Sales	$	1,929,788	$	1,733,749	$	1,345,249

During fiscal 2023, fiscal 2022, and fiscal 2021, three customers each accounted for more than 10% of net sales and in the aggregate accounted for 44%, 49% and 54% of net sales in fiscal 2023, fiscal 2022, and fiscal 2021, respectively. Sales to these three customers are included in the Light Duty segment operating income.

13. Capital Stock

Controlling Interest by Officers, Directors and Family Members. As of December 31, 2023 and December 31, 2022, Steven Berman, the Non-Executive Chairman of the Company, and members of his family beneficially owned approximately 16% of the outstanding shares of our common stock, and could influence matters requiring approval of shareholders, including the election of the Board of Directors and the approval of significant transactions.

Undesignated Stock. We have 50,000,000 shares authorized of undesignated capital stock for future issuance. The designation, rights and preferences of such shares will be determined by our Board of Directors.

Incentive Stock Plan. Prior to May 16, 2018, we issued stock compensation grants under our 2008 Stock Option and Stock Incentive Plan. On May 16, 2018, our shareholders approved our 2018 Stock Option and Stock Incentive Plan (the “2018 Plan” or the “Plan”), which supersedes our 2008 Stock Option and Stock Incentive Plan. All future stock compensation grants will be issued under the 2018 Plan. Under the terms of the Plan, our Board of Directors may grant up to 1,200,000 shares of common stock in the form of shares of restricted stock, restricted stock units, stock appreciation rights and stock options, or combinations thereof, to officers, directors, employees, consultants and advisors. Grants under the Plan must be made within ten years of the date the Plan was approved. Stock options are exercisable upon the terms set forth in each grant agreement approved by the Board of Directors, but in no event more than ten years from the date of grant. Restricted stock and restricted stock units vest in accordance with the terms set forth in each applicable award agreement approved by our Board of Directors. At December 31, 2023, 442,462 shares were available for grant under the Plan.

Restricted Stock Awards (“RSAs”) and Restricted Stock Units (“RSUs”)

Prior to March 2020, we issued RSAs to certain employees and members of our Board of Directors. Grants were made in the form of time-based RSAs and performance-based RSAs. For all RSAs, we retain the restricted stock, and any dividends paid thereon, until the vesting restrictions have been met. For time-based RSAs, compensation cost is recognized on a straight-line basis over the vesting period and is calculated using the closing price per share of our common stock on the grant date. Compensation cost related to those awards was recognized over the performance period and was calculated using the closing price per share of our common stock on the grant date and an estimate of the probable outcome of the performance conditions as of the reporting date. In 2019, we introduced performance-based RSAs that vest based on our total shareholder return ranking relative to the S&P Mid-Cap 400 Growth Index over a three-year performance period. For those awards, compensation cost is recognized on a straight-line basis over the performance period and is calculated using the simulated fair value per share of our common stock based on the application of a Monte Carlo simulation model. This valuation technique includes estimating the movement of stock prices and the effects of volatility, interest rates and dividends.

We issue RSUs to certain employees and members of our Board of Directors. For time-based RSUs, compensation cost is recognized on a straight-line basis over the vesting period and is calculated using the closing price per share of our common stock on the grant date. For performance-based RSUs tied to total shareholder return, compensation cost is recognized on a straight-line basis over the performance period and is calculated using the simulated fair value per share of our common stock based on the application of a Monte Carlo simulation model as discussed in the paragraph above.

The following table summarizes the weighted average valuation assumptions used to calculate the fair value of total shareholder return performance-based RSUs granted:


	For the Year Ended
	December 31, 2023			December 31, 2022			December 25, 2021
Share price	$	91.28		$	96.36		$	101.45
Expected dividend yield	0.0		%	0.0		%	0.0		%
Expected stock price volatility	32.8		%	38.3		%	38.9		%
Risk-free interest rate	4.6		%	1.6		%	0.2		%
Expected life	2.8 years			2.8 years			2.8 years

The share price is the Company’s closing share price as of the valuation date. The risk-free interest rate is based on the U.S. Treasury security with terms equal to the expected time of vesting as of the grant date. The weighted-average grant-date fair value of total shareholder return RSUs granted during fiscal 2023, fiscal 2022, and fiscal 2021 were $113.15, $111.31, and $131.02, respectively.

Compensation cost related to performance-based and time-based RSAs and RSUs was $9.1 million, $7.2 million and $6.1 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively, and was included in selling, general and administrative expenses in the Consolidated Statements of Operations. No cost was capitalized during fiscal 2023, fiscal 2022 or fiscal 2021.

The following table summarizes our RSA and RSU activity for the three years ended December 31, 2023:


	Shares	Weighted Average Fair Value
Balance at December 26, 2020	217,735	$	72.77
Granted	81,694	$	106.23
Vested	(45,970)	$	70.62
Canceled	(46,782)	$	74.85
Balance at December 25, 2021	206,677	$	85.97
Granted	130,131	$	96.32
Vested	(55,255)	$	83.70
Canceled	(42,631)	$	85.89
Balance at December 31, 2022	238,922	$	92.07
Granted	112,893	$	95.34
Vested	(73,169)	$	80.63
Canceled	(21,092)	$	85.00
Balance at December 31, 2023	257,554	$	97.33

As of December 31, 2023, there was approximately $13.5 million of unrecognized compensation cost related to unvested RSAs and RSUs, which is expected to be recognized over a weighted-average period of approximately 2.0 years.

Cash flows resulting from tax deductions in excess of the tax effect of compensation cost recognized in the financial statements are classified as operating cash flows. The excess tax benefit generated from RSAs and RSUs was immaterial for all periods presented.

Stock Options

We grant stock options to certain employees. We expense the grant-date fair value of stock options as compensation cost over the vesting or performance period. Compensation cost charged against income for stock options was $2.0 million, $1.7 million and $1.3 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively,

and was included in selling, general and administrative expense in the Consolidated Statements of Operations. No cost was capitalized during fiscal 2023, fiscal 2022 or fiscal 2021.

We used the Black-Scholes option valuation model to estimate the fair value of stock options granted. Expected volatility and expected dividend yield are based on the actual historical experience of our common stock. The expected life represents the period of time that options granted are expected to be outstanding and was calculated using historical option exercise data. The risk-free rate is based on the U.S. Treasury security with terms equal to the expected time of exercise as of the grant date.

The following table summarizes the weighted average valuation assumptions used to calculate the fair value of options granted and the associated weighted-average grant-date fair values:


	For the Year Ended
	December 31, 2023			December 31, 2022			December 25, 2021
Expected dividend yield	0		%	0		%	0		%
Expected stock price volatility	35		%	34		%	34		%
Risk-free interest rate	4.3		%	1.8		%	0.7		%
Expected life of options	5.3 years			5.3 years			5.3 years
Weighted-average grant-date fair value	$	35.93		$	32.55		$	31.68

The following table summarizes our stock option activity for the three years ended December 31, 2023:


	Shares	Option Price per Share	Weighted Average Price		Weighted Average Remaining Terms (years)	Aggregate Intrinsic Value (in thousands)
Balance at December 26, 2020	250,779	$41.59– $84.93	$	70.21
Granted	59,578	$95.98 – $103.61	$	101.36
Exercised	(67,504)	$41.59 – $82.94	$	70.04
Canceled	(9,457)	$61.68 – $101.45	$	79.02
Balance at December 25, 2021	233,396	$61.68 –$103.61	$	77.85
Granted	79,749	$83.81 – $111.53	$	96.96
Exercised	(32,201)	$61.68 – $83.06	$	71.74
Expired	(663)	$101.45	$	101.45
Canceled	(12,162)	$61.68– $101.45	$	82.19
Balance at December 31, 2022	268,119	$61.68– $111.53	$	84.03
Granted	79,404	$86.63 – $91.28	$	91.13
Exercised	(24,297)	$$61.68 – $82.94	$	72.33
Expired	(7,488)	$81.91 – $101.45	$	91.24
Canceled	(4,521)	$82.94 – $101.45	$	88.52
Balance at December 31, 2023	311,217	$61.68 – $111.53	$	86.52	5.4	$	1,697
Exercisable at	134,348	$61.68 – $111.53	$	80.35	4.4	$	1,243

As of December 31, 2023, there was approximately $4.0 million of unrecognized compensation cost related to unvested stock options, which is expected to be recognized over a weighted-average period of approximately 2.6 years.

Cash received from option exercises was $1.2 million, $1.0 million, and $2.5 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively. The tax benefit generated from option exercises was immaterial for all periods presented.

Employee Stock Purchase Plan. Our shareholders approved the Dorman Products, Inc. Employee Stock Purchase Plan (the “ESPP”), which makes available 1,000,000 shares of our common stock for sale to eligible employees. The purpose of the ESPP, which is qualified under Section 423 of the Internal Revenue

Service Code of 1986, as amended, is to encourage stock ownership through payroll deductions and limited cash contributions by our employees. These contributions are used to purchase shares of the Company’s common stock at a 15% discount from the lower of the market price at the beginning or end of the purchase window. Prior to 2021, share purchases under the plan were made twice annually, with the purchase windows being April to September and October to March. In 2021, the decision was made to modify the timing of those two purchase windows to align them with the calendar year. In order to effectuate that alignment, the purchase window beginning in October 2021 was shortened from six months to three months and ended December 2021. Beginning January 2022, the two purchase windows are January to June and July to December. There were 29,650 shares, 25,600 shares and 40,303 shares purchased under this plan during fiscal 2023, fiscal 2022 and fiscal 2021, respectively. Compensation cost under the ESPP plan was $0.4 million, $0.4 million and $0.9 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively. The tax benefit generated from ESPP purchases was immaterial in fiscal 2023, fiscal 2022, and fiscal 2021, respectively.

Common Stock Repurchases. We periodically repurchase, at the then current market price, and cancel common stock issued to the Dorman Products, Inc. 401(k) Plan and Trust (the “401(k) Plan”). 401(k) Plan participants can no longer purchase shares of Dorman common stock as an investment option under the 401(k) Plan. Shares are generally purchased from the 401(k) Plan when participants sell units as permitted by the 401(k) Plan or elect to leave the 401(k) Plan upon retirement, termination or other reasons. The following table summarizes the repurchase and cancellation of common stock:


	For the Year Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Shares repurchased and canceled	13,778		23,015		11,452
Total cost of shares repurchased and canceled (in thousands)	$	1,160	$	2,357	$	1,172
Average price per share	$	84.22	$	102.40	$	102.38

At December 31, 2023, the 401(k) Plan held 147,123 shares of our common stock.

Share Repurchase Program. Our Board of Directors has authorized a share repurchase program. Through several actions, including expansions and extensions, the Board has authorized the repurchase of up to $600 million of our outstanding common stock through December 31, 2024. Under this program, share repurchases may be made from time to time depending on market conditions, share price, share availability and other factors at our discretion. At December 31, 2023, $212.7 million was available for repurchase under this program.

The following table summarizes the repurchase and cancellation of common stock:


	For the Years Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Shares repurchased and canceled	201,632		180,750		605,628
Total cost of shares repurchased and canceled (in thousands)	$	15,333	$	17,577	$	61,583
Average price per share	$	76.05	$	97.24	$	101.68

401(k) Retirement Plans. We have various 401(k) plans that cover substantially all of our employees as of December 31, 2023. Annual company contributions are discretionary in nature, in accordance with the respective plan documents. Total expense related to the plans were $9.1 million, $8.2 million and $6.3 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively.

14. Earnings Per Share

Basic earnings per share was calculated by dividing our net income by the weighted average number of common shares outstanding during the period, excluding unvested RSAs which are considered to be contingently issuable. To calculate diluted earnings per share, common share equivalents are added to the weighted average number of common shares outstanding. Common share equivalents are calculated using the treasury stock method and are computed based on outstanding stock-based awards. Stock-based awards of approximately 297,500 shares, 63,500 shares and 14,250 shares were excluded from the calculation of diluted

earnings per share for fiscal 2023, fiscal 2022 and fiscal 2021, respectively, as their effect would have been anti-dilutive.

The following table sets forth the computation of basic earnings per share and diluted earnings per share:


	For the Year Ended
(in thousands, except per share data)	December 31, 2023		December 31, 2022		December 25, 2021
Numerator:
Net income	$	129,259	$	121,549	$	131,532
Denominator:
Weighted average basic shares outstanding	31,455		31,434		31,810
Effect of compensation awards	78		109		151
Weighted average diluted shares outstanding	31,533		31,543		31,961
Earnings Per Share:
Basic	$	4.11	$	3.87	$	4.13
Diluted	$	4.10	$	3.85	$	4.12

ITEM 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.

None

ITEM 9A. Controls and Procedures.

Conclusion Regarding the Effectiveness of Disclosure Controls and Procedures

We maintain disclosure controls and procedures designed to provide reasonable assurance that information required to be disclosed in reports filed or submitted under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms and accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosures.

Our management, with the participation of our Chief Executive Officer and our Chief Financial Officer, conducted an evaluation, as of the end of the period covered by this report, of the effectiveness of our disclosure controls and procedures, as such term is defined in Exchange Act Rule 13a-15(e). Based on this evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that, as of the end of the period covered by this report, our disclosure controls and procedures, as defined in Rule 13a-15(e), were effective at the reasonable assurance level.

On October 4, 2022, we completed our acquisition of Super ATV, LLC ("SuperATV"). We have evaluated the existing controls and procedures of SuperATV and integrated SuperATV into our internal control over financial reporting as of December 31, 2023. Refer to Note 2, "Business Acquisitions and Investments," to the Condensed Consolidated Financial Statements for additional information.

Management's Report on Internal Control Over Financial Reporting

Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Exchange Act Rule 13a-15(f). Management, with the participation of our Chief Executive Officer and Chief Financial Officer, conducted an evaluation, as of December 31, 2023, of the effectiveness of our internal control over financial reporting based on the framework in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation, management concluded that our internal control over financial reporting was effective as of December 31, 2023.

Our independent registered public accounting firm, KPMG LLP, has issued an attestation report on our internal control over financial reporting. Their report appears below.

Changes in Internal Control Over Financial Reporting

Except for the integration of SuperATV into our internal control over financial reporting as of December 31, 2023 noted above, there was no change in our internal control over financial reporting (as defined in Rule 13a-15(f) under the Exchange Act) that occurred during the quarter ended December 31, 2023, that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

Report of Independent Registered Public Accounting Firm

To the Shareholders and Board of Directors

Dorman Products, Inc.:

Opinion on Internal Control Over Financial Reporting

We have audited Dorman Products, Inc. and subsidiaries' (the Company) internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission. In our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2023, based on criteria established in Internal Control – Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2023 and 2022, the related consolidated statements of operations and comprehensive income, shareholders’ equity, and cash flows for each of the years in the three-year period ended December 31, 2023, and the related notes and financial statement schedule II (collectively, the consolidated financial statements), and our report dated February 28, 2024 expressed an unqualified opinion on those consolidated financial statements.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audit also included performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that

controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ KPMG LLP

Philadelphia, Pennsylvania

February 28, 2024

ITEM 9B. Other Information.

During the fourth quarter of 2023, none of our directors or executive officers adopted or terminated any "Rule 10b5-1 trading arrangement" or "non-Rule 10b5-1 trading arrangement" (as each term is defined in Item 408(a) of Registration S-K).

ITEM 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections.

None

PART III

ITEM 10. Directors, Executive Officers and Corporate Governance.

Except for the information provided in PART I – ITEM 4.1, “Executive Officers of the Registrant” and as set forth below, the required information is incorporated by reference from our definitive proxy statement for our 2024 Annual Meeting of Shareholders, including, but not necessarily limited to, the sections entitled “Proposal I: Election of Directors,” and “Committees of the Board of Directors – Audit Committee.”

In addition, information regarding the Company’s insider trading policies and procedures governing the purchase, sale and/or other dispositions of the Company’s securities is incorporated by reference from our definitive proxy statement for our 2024 Annual Meeting of Shareholders under the section entitled “Executive Compensation: Compensation Discussion and Analysis – Insider Trading Policy.”

We have adopted a written code of ethics, the “Dorman Products, Inc. Code of Ethics and Business Conduct” that is applicable to our directors, officers and employees. We have also adopted a written code of ethics, “Code of Ethics for Senior Financial Officers,” which applies to our Chief Executive Officer, Chief Financial Officer, Principal Accounting Officer, Controller and any other person performing similar functions (the “Code”). Each of these codes is posted on our website DormanProducts.com. Dorman will provide to any person without charge, upon request, a copy of the Code. Requests for copies of the Code should be directed to: Attn: Secretary, Dorman Products, Inc., 3400 East Walnut Street, Colmar, PA 18915. We intend to disclose any changes in or waivers from the Code on our website at DormanProducts.com. The information on the website is not and should not be considered part of this Form 10-K and is not incorporated by reference in this Form 10-K.

ITEM 11. Executive Compensation.

The required information is incorporated by reference from our definitive proxy statement for our 2024 Annual Meeting of Shareholders, including, but not necessarily limited to, the sections entitled “Director Compensation,” “Executive Compensation: Compensation Discussion and Analysis,” “Executive Compensation: Compensation Tables,” “Risk Assessment in Compensation Policies and Practices for Employees,” and “Compensation Committee Interlocks and Insider Participation.”

ITEM 12. Security Ownership of Certain Beneficial Owners and Management and Related Shareholder Matters.

Except for the information set forth below, the required information is incorporated by reference from our definitive proxy statement for our 2024 Annual Meeting of Shareholders, including, but not necessarily limited to, the section entitled “Security Ownership of Certain Beneficial Owners and Management – Security Ownership Table.”

Equity Compensation Plan Information

The following table details information regarding our existing equity compensation plans as of December 31, 2023:


Plan Category	(a) Number of securities to be issued upon exercise of outstanding options, warrants and rights	(b) Weighted- average exercise price of outstanding options, warrants and rights		(c) Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Equity compensation plans approved by security holders
2018 Stock Option and Stock Incentive Plan	311,217	$	86.52	442,462
Dorman Products, Inc. Employee Stock Purchase Plan	—	—		782,983
Equity compensation plans not approved by security holders	—	—		—
Total	311,217	$	86.52	1,225,445

ITEM 13. Certain Relationships and Related Transactions, and Director Independence.

The required information is incorporated by reference from our definitive proxy statement for our 2024 Annual Meeting of Shareholders, including, but not necessarily limited to, the sections entitled “Certain Relationships and Related Transactions” and “Corporate Governance - The Board of Directors and Director Independence.”

ITEM 14. Principal Accounting Fees and Services.

PART IV

ITEM 15. Exhibits, Financial Statement Schedules.

(a)(1)Consolidated Financial Statements. Our Consolidated Financial Statements and related documents are provided in PART II - ITEM 8, “Financial Statements and Supplementary Data” of this Annual Report on Form 10-K:

Report of Independent Registered Public Accounting Firm (PCAOB ID: 185).

Consolidated Statements of Operations for the fiscal years ended December 31, 2023, December 31, 2022 and December 25, 2021.

Consolidated Balance Sheets as of December 31, 2023 and December 31, 2022.

Consolidated Statements of Shareholders' Equity for the fiscal years ended December 31, 2023, December 31, 2022 and December 25, 2021.

Consolidated Statements of Cash Flows for the fiscal years ended December 31, 2023, December 31, 2022, and December 25, 2021.

Notes to Consolidated Financial Statements.

(a)(2)Consolidated Financial Statement Schedules. The following consolidated financial statement schedule of the Company and related documents are filed with this Annual Report on Form 10-K:

Schedule II - Valuation and Qualifying Accounts.

(a)(3)Exhibits. Reference is made to ITEM 15(b) below.

(b)Exhibits. The Exhibit Index, which immediately precedes the signature page, is incorporated by reference into this Report.

(c)Financial Statement Schedule. Reference is made to ITEM 15(a)(2) above.

ITEM 16. Form 10-K Summary

None


Number						Title

2.1						Agreement and Plan of Merger, dated June 25, 2021, by and among Dorman Products, Inc., Senators Merger Sub, Inc., DPL Holding Corporation and SBF II Representative Corp., solely in its capacity as Equityholder Representative. Incorporated by reference to Exhibit 2.1 to the company’s Current Report on Form 8-K filed on June 28, 2021. +

2.1.1						Unit Purchase Agreement, dated August 17, 2022, by and among Dorman Products, Inc., Super ATV, LLC, the Sellers listed on the signature pages thereto, and Lindsay Hunt, in her capacity as the Sellers’ Representative. Incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on August 18, 2022. +

2.1.2						Amendment, dated as of October 4, 2022 to Unit Purchase Agreement, dated August 17, 2022, by and among Dorman Products, Inc., Super ATV, LLC, the Sellers listed on the signature pages thereto, and Lindsay Hunt, in her capacity as the Sellers’ Representative. Incorporated by reference to Exhibit 2.1 to the Company’s Current Report on Form 8-K filed on October 4, 2022 . +

3.1						Amended and Restated Articles of Incorporation, as amended. Incorporated by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K filed on May 19, 2017.

3.2						Dorman Products, Inc. Amended and Restated By-Laws, as amended February 23, 2023. I ncorporated by reference to Exhibit 3.1 to the Company's Qua rterly Report on Form 10-Q filed on May 2, 2023.


Number						Title

4.1						Specimen Common Stock Certificate of the Company. Incorporated by reference to Exhibit 4.1 to the Company’s Registration Statement on Form S-8 (Registration No. 333-160979).

4.2						Amended and Restated Shareholders' Agreement dated as of July 1, 2006. Incorporated by reference to Exhibit 4.1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 27, 2008.

4.3						Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934. Incorporated by reference to Exhibit 4.3 to the Company’s Annual Report on Form 10-K filed on February 22, 2021.

10.1						Credit Agreement, dated August 10, 2021 by and among Dorman Products, Inc., the lenders from time to time party thereto, and Bank of American, N.A., as administrative agent. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on August 10, 2021.

10.2						Amendment No. 1 to Credit Agreement, dated October 4, 2022 by and among Dorman Products, Inc., the lenders from time to time party thereto, and Bank of America, N.A., as administrative agent. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on October 4, 2022. +

10.3†						Dorman Products, Inc. 2008 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-8 (Registration No. 333-160979).

10.3.1†						Form of Incentive Stock Option Agreement pursuant to the Dorman Products, Inc. 2008 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-8 (Registration No. 333-160979).

10.3.2†						Form of Non-Qualified Stock Option Agreement for Officers and Other Key Employees pursuant to the Dorman Products, Inc. 2008 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-8 (Registration No. 333-160979).

10.3.3†						Form of Restricted Stock Agreement pursuant to the Dorman Products, Inc. 2008 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Registration Statement on Form S-8 (Registration No. 333-160979).

10.3.4†						Amendment No. 1 to the Dorman Products, Inc. 2008 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q for the quarter ended September 28, 2013.

10.3.5†						Amendment No. 2 to the Dorman Products, Inc. 2008 Stock Option Plan and Stock Incentive Plan. Incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on May 20, 2014.

10.4†						Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit A of the Company’s Definitive Proxy Statement filed on Schedule 14A on March 22, 2018.

10.4.1†						Form of Non-Qualified Stock Option Award for grants under the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on May 14, 2018.


Number						Title
10.4.2†						Form of Incentive Stock Option Award for grants under the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on May 14, 2018.

10.4.3†						Form of Restricted Stock Award for grants under the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed on May 14, 2018.

10.4.4†						Form of 2019 Chief Executive Officer Restricted Stock Award Agreement under the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 25, 2019.

10.4.5†						Form of Dorman Products, Inc. Non-Qualified Stock Option Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on March 2, 2020.

10.4.6†						Form of Dorman Products, Inc. Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on March 2, 2020.

10.4.7†						Form of Dorman Products, Inc. Performance Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.3 to the Company’s Current Report on Form 8-K filed on March 2, 2020.

10.4.8†						Form of Dorman Products, Inc. Restricted Stock Unit Award for Non-Employee Directors Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 10-Q for the quarter ended June 27, 2020.

10.4.9†						Amended Form of Dorman Products, Inc. Non-Qualified Stock Option Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.5.9 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

10.4.10†						Amended Form of Dorman Products, Inc. Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.5.10 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

10.4.11†						Amended Form of Dorman Products, Inc. Performance Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.5.11 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

10.4.12†						CEO Amended Form of Dorman Products, Inc. Non-Qualified Stock Option Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.5.12 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

10.4.13†						CEO Amended Form of Dorman Products, Inc. Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.5.13 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.

10.4.14†						CEO Amended Form of Dorman Products, Inc. Performance Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan. Incorporated by reference to Exhibit 10.5.14 to the Company’s Annual Report on Form 10-K for the year ended December 31, 2023.


Number						Title

10.4.15†						Amended Form of Dorman Products, Inc. Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan.*

10.4.16†						Amended Form of Dorman Products, Inc. Performance Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan.*

10.4.17†						CEO Amended Form of Dorman Products, Inc. Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan.*

10.4.18†						CEO Amended Form of Dorman Products, Inc. Performance Restricted Stock Unit Award Pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan.*

10.5†						Dorman Products, Inc. Nonqualified Deferred Compensation Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 11, 2011.

10.6†						Dorman Products, Inc. 2018 Cash Bonus Plan. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on March 22, 2018.

10.7†						Amended and Restated Employment Agreement, dated December 28, 2015, between the Company and Steven Berman. Incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on December 28, 2015.

10.8†						Amended and Restated Employment Agreement between the Company and Kevin M. Olsen dated December 13, 2021. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on December 13, 2021.

10.9†						Offer Letter, dated January 24, 2019, between the Company and David Hession. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 19, 2019.

10.10†						Offer Letter, dated April 8, 2019, between the Company and Joseph P. Braun. Incorporated by reference to Exhibit 10.17 to the Company’s Annual Report on Form 10-K for the fiscal year ended December 28, 2019.

10.11†						Dorman Products, Inc. Executive Severance Plan. Incorporated by reference to Exhibit 10.2 to the Company’s Current Report on Form 8-K filed on December 13, 2021.

10.12†						Transition and Release Agreement dated February 23, 2023 between the Company and Steven L. Berman. Incorporated by reference to Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on February 24, 2023.

19						Dorman Products, Inc. Insider Trading Policy adopted February 23, 2023.*

21						Subsidiaries of the Company.

23						Consent of Independent Registered Public Accounting Firm.

31.1						Certification of Chief Executive Officer as required by Section 302 of the Sarbanes-Oxley Act of 2002.

31.2						Certification of Chief Financial Officer as required by Section 302 of the Sarbanes-Oxley Act of 2002.

32						Certification of Chief Executive and Chief Financial Officer as required by Section 906 of the Sarbanes-Oxley Act of 2002.


Number						Title
97						Dorman Products, Inc. Incentive Compensation Clawback Policy adopted October 25, 2023. Incorporated by reference to Exhibit 10.1 to the Company’s Quarterly Report on Form 10-Q filed on October 31, 2023.

101						The financial statements from the Dorman Products, Inc. Annual Report on Form 10-K for the year ended December 31, 2023, formatted Inline XBRL (eXtensible Business Reporting Language): (i) the Consolidated Statements of Operations for the years ended December 31, 2023, December 31, 2022, and December 25, 2021; (ii) the Consolidated Balance Sheets as of December 31, 20223 and December 31, 2022; (iii) the Consolidated Statements of Shareholders’ Equity for the years ended December 31, 2023, December 31, 2022, and December 25, 2021; (iv) the Consolidated Statements of Cash Flows for the years ended December 31, 2023, December 31, 2022, and December 25, 2021; and (v) the Notes to Consolidated Financial Statements.

104						The cover page from the Company’s Annual Report on Form 10-K as of and for the fiscal year ended December 31, 2023, formatted in Inline XBRL (included as Exhibit 101).

* Filed herewith

† Management Contracts and Compensatory Plans, Contracts or Arrangements

+ The schedules and exhibits have been omitted pursuant to Item 601(b)(2) of Regulation S-K. The Company agrees to furnish a copy of such schedules and exhibits, or any section thereof, to the SEC upon request

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.


			Dorman Products, Inc.

			By: /s/ Kevin M. Olsen
Date: February 28, 2024			Kevin M. Olsen President and Chief Executive Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature

Title

Date

/s/ Kevin M. Olsen

President, Chief Executive Officer and Director

February 28, 2024

Kevin M. Olsen

(principal executive officer)

/s/ David M. Hession

Senior Vice President, Chief Financial Officer and Treasurer

February 28, 2024

David M. Hession

(principal financial and accounting officer)

/s/ Lisa M. Bachmann

Director

February 28, 2024

Lisa M. Bachmann

/s/ Steven L. Berman

Non-Executive Chairman

Steven L. Berman

February 28, 2024

/s/ John J. Gavin

Director

John J. Gavin

February 28, 2024

/s/ Richard T. Riley

Director

Richard T. Riley

February 28, 2024

/s/ Kelly A. Romano

Director

Kelly A. Romano

February 28, 2024

/s/ G. Michael Stakias

Director

G. Michael Stakias

February 28, 2024

/s/ J. Darrell Thomas

Director

J. Darrell Thomas

February 28, 2024

SCHEDULE II: Valuation and Qualifying Accounts


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Allowance for doubtful accounts:
Balance, beginning of period	$	1,363	$	1,326	$	1,260
Provision	4,592		56		177
Charge-offs	(2,437)		(19)		(111)

Balance, end of period	$	3,518	$	1,363	$	1,326
Allowance for customer credits:
Balance, beginning of period	$	192,116	$	188,080	$	155,751
Provision	407,328		373,157		334,615
Charge-offs	(394,949)		(369,121)		(302,286)
Balance, end of period	$	204,495	$	192,116	$	188,080

Exhibit 10.4.15

DORMAN PRODUCTS, INC.
RESTRICTED STOCK UNIT AWARD PURSUANT TO THE
DORMAN PRODUCTS, INC. 2018 STOCK OPTION AND STOCK INCENTIVE PLAN

THIS RESTRICTED STOCK UNIT AWARD (this “Award”) dated as of the #Grant Date# is entered into by and between Dorman Products, Inc. (the “Company”) and Participant.

1.Grant of Restricted Stock Units. Effective as of the Grant Date, pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan (the “Plan”), the Company hereby grants to Participant #Number of Shares Granted# Restricted Stock Units (the “RSUs”), subject to the terms and conditions set forth in this Award and the Plan. This Award is in consideration for Participant’s acceptance of and agreement to the restrictive covenants set forth in Section 7 of this Award.

2.Dividend Equivalents.

(a)The RSUs are granted with dividend equivalent rights. If the Company declares a cash dividend on the Shares, an amount equivalent to such dividend will be credited to an unfunded bookkeeping account with respect to each outstanding and unvested RSU (the “Dividend Equivalent Amount”) on the record date of such dividend.

(b)The Dividend Equivalent Amount will be credited as cash, without interest, and will not be converted to Shares. The Dividend Equivalent Amount will be payable in cash, but only upon the applicable vesting date(s) of the underlying RSUs as determined in accordance with Section 3 below, and will be cancelled and forfeited if the underlying RSUs are cancelled or forfeited as determined in accordance with Section 3 below.

3.Vesting of RSUs.

(a)Subject to the provisions of Sections 3(b) and (c), the RSUs shall vest [ ]% on each [ ] anniversary of the Grant Date beginning on [ ] (each a “Vesting Date”), provided that Participant remains employed by or providing service to the Company on such Vesting Date. The vesting of the RSUs shall be cumulative, but shall not exceed 100% of the RSUs. If the foregoing schedule would produce fractional RSUs, the number of RSUs that vest shall be rounded down to the nearest whole RSU and the fractional RSU will be accumulated so that the resulting whole RSU will be included in the number of RSUs that become vested on the last Vesting Date.

(b)Upon a Change in Control, 100% of the unvested portion of the RSUs shall vest.

(c)Upon Participant’s termination of employment or service for any of the following reasons, the unvested portion of the RSUs shall vest as indicated:

(i)100% as of the date of Participant’s death; or

Page 1 of 6

(ii)100% as of the date of Participant’s termination of employment or service due to Disability.

Except as provided above, upon the termination of employment or service of Participant, any unvested RSUs will immediately and automatically, without any action on the part of the Company, be forfeited and cancelled.

4.Delivery of Shares; Tax Withholding; Securities Laws.

(a)Within thirty (30) days of a Vesting Date, the Company shall (i) pay the Dividend Equivalent Amount (if any) and (ii) deliver Shares issuable with respect to any vested RSUs.

(b)All obligations of the Company to deliver Shares shall be subject to the rights of the Company to withhold amounts required by law for any Federal Insurance Contributions Act (FICA), federal income, state, local and other tax liabilities (“Withholding Taxes”). By accepting this Award, Participant hereby: (i) elects, effective on the date Participant accepts this Award, to sell Shares in an amount having an aggregate Fair Market Value equal to the Withholding Taxes, and to allow the designated broker (the “Broker”) to remit the cash proceeds of such sale to the Company (a “Sell to Cover”); (ii) directs the Company to make a cash payment to satisfy the Withholding Taxes from the cash proceeds of such sale directly to the appropriate taxing authorities; and (iii) represents and warrants that (1) on the date Participant accepts this Award he or she is not aware of any material, nonpublic information with respect to the Company or any securities of the Company, is not subject to any legal, regulatory or contractual restriction that would prevent the Broker from conducting sales, does not have, and will not attempt to exercise, authority, influence or control over any sales of Shares effected by the Broker pursuant to this Award, (2) is entering into the Award and this election to Sell to Cover in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b5-1 (regarding trading of the Company’s securities on the basis of material nonpublic information) under the 1934 Act, and (3) it is Participant’s intent that this election to Sell to Cover comply with the requirements of Rule 10b5-1(c)(1) under the 1934 Act and be interpreted to comply with the requirements of Rule 10b5-1(c) under the 1934 Act. Participant further acknowledges that by accepting this Award, Participant is adopting a 10b5-1 Plan to permit Participant to conduct a Sell to Cover sufficient to satisfy the Withholding Taxes. All obligations to pay any Dividend Equivalent Amount will be paid net of any Withholding Taxes.

(c)The obligation of the Company to deliver Shares shall also be subject to the condition that if at any time the Company shall determine in its discretion that the listing, registration or qualification of the Shares upon any securities exchange or under any state or federal law, or the consent or approval of any governmental regulatory body is necessary or desirable as a condition of, or in connection with, the issuance of Shares, the Shares may not be issued in whole or in part unless such listing, registration, qualification, consent or approval shall have been effected or obtained free of any conditions not acceptable to the Company.

Page 2 of 6

distribution. The rights and protections of the Company hereunder shall extend to any successors or assigns of the Company and to the Company’s parent(s) and each of its Affiliates. This Award may be assigned by the Company without Participant’s consent.

6.Section 409A. This Award is intended to be exempt from or otherwise comply with the provisions of Section 409A. If the RSUs constitute “deferred compensation” under Section 409A and the RSUs become vested and settled upon Participant’s termination of employment or service, payment with respect to the RSUs shall be delayed for a period of six months after the termination if Participant is a “specified employee” as defined under Section 409A and if required pursuant to Section 409A. If payment is delayed, the RSUs shall be settled and paid within thirty (30) days after the date that is six (6) months following Participant’s termination of employment or service. Payments with respect to the RSUs may only be paid in a manner and upon an event permitted by Section 409A, and each payment under this Award shall be treated as a separate payment, and the right to a series of installment payments shall be treated as a right to a series of separate payments. In no event shall Participant, directly or indirectly, designate the calendar year of payment. The Company may change or modify the terms of this Award without Participant’s consent or signature if the Company determines, in its sole discretion, that such change or modification is necessary for purposes of compliance with or exemption from the requirements of Section 409A.

7.Restrictive Covenants.

(a)As a condition of receiving this Award, Participant hereby acknowledges and agrees that during the period in which Participant is employed by, or providing service to, any member of the Company and its Affiliates (the “Company Group”) for the twelve (12) month-period following termination of Participant’s employment or service for any reason (the “Restrictions Period”), Participant shall comply with the restrictive covenants set forth herein applicable to the Company Group.

(b)During the Restrictions Period, Participant shall not anywhere in the Territory on behalf of Participant, or through or on behalf of any other person or entity (other than the Company), whether as an officer, director, employee, equityholder, consultant or otherwise, as applicable:

(1)directly or indirectly, engage, participate, make any financial investment in, own any financial or beneficial interest in, operate, or become employed by or provide services to any business, corporation, firm, person, or other entity (together with its affiliates and subsidiaries, the “Competing Enterprise”) which is engaged, directly or indirectly, during Participant’s employment in competition with the Company Group in the Business anywhere in the Territory; provided, that the Businesses of the Competing Enterprise account for more than ten percent (10%) of the gross sales of the Competing Enterprise for its most recently completed fiscal year and Participant does not work for, advise or provide consulting services to such Businesses. Notwithstanding the foregoing, Participant shall not be prohibited from owning or acquiring securities in any publicly traded company as long as Participant’s ownership does not exceed 1% of such publicly traded company’s outstanding securities;

Page 3 of 6

(2)encourage, induce, attempt to induce, solicit or attempt to solicit any employee, director, officer, associate, consultant, agent or independent contractor to terminate his or her employment with or engagement by the Company Group in order to become employed or engaged by any person, firm, corporation or other business enterprise other than a member of the Company Group, except in the furtherance of Participant’s responsibility while Participant is employed by the Company Group, or hire or retain, or attempt to hire or retain, any employee, director, officer, associate, consultant, agent or independent contractor of the Company Group; provided, that nothing in this Award prohibits Participant from hiring an individual who responds to a job posting made available to the general public so long as Participant does not solicit or otherwise initiate such contact during the one year following termination of Participant’s employment or service; or

(3)encourage, induce, attempt to induce, solicit or attempt to solicit, any customer, distributor, supplier, vendor, marketer or sponsor of the Company Group to cease or reduce its customer, distributor, supplier, vendor, marketer or sponsor relationship with the Company Group.

(c) The restrictions contained in this Section are necessary for the protection of the business and goodwill of the Company Group and are considered by Participant to be reasonable for such purpose. Participant acknowledges that a breach of any of the covenants contained in this Section may cause irreparable damage to the Company and its subsidiaries and affiliates, the exact amount of which would be difficult to ascertain, and that the remedies at law for any such breach or threatened breach would be inadequate. Accordingly, Participant agrees that if Participant breaches or threatens to breach any of the covenants contained in this Section, then in addition to any other remedy which may be available to the Company at law or in equity, the Company shall be entitled to institute and prosecute proceedings in any court of competent jurisdiction for specific performance and injunctive relief to prevent the breach or any threatened breach thereof without bond or other security or a showing that monetary damages will not provide an adequate remedy. Furthermore, Participant agrees that if Participant willfully and materially breaches any of the covenants contained in this Section, then in addition to any other remedy which may be available to the Company at law or in equity, the Company shall be entitled to cease or withhold any payment of Shares to Participant pursuant to this Award, including the return of any previously delivered Shares or proceeds recognized upon any sale or other disposition of those Shares. Participant further acknowledges that the restrictions and limitations set forth in this Award will not materially interfere with Participant’s ability to earn a living following the termination of Participant’s employment with the Company and that Participant’s ability to earn a livelihood without violating such restrictions is a material condition to Participant’s employment with the Company. Participant agrees to disclose in advance the existence and terms of the restrictions and covenants contained in this Award to any employer or service recipient by whom Participant might be employed or retained during the Restrictions Period.

(d)For purposes of this Section:

Page 4 of 6

mass merchandisers, or any other business activities of the Company Group accounting for more than ten percent (10%) of its gross sales in the most recently completed fiscal year or reasonably expected to do so in the current fiscal year, in the United States and in any foreign jurisdiction in which the Company Group operates or, at the end of Participant’s employment, proposes to operate.

(2)“Territory” means any state, jurisdiction or territory in the world in which any member of the Company Group is engaged in business during the Restrictions Period.

(e)The terms “employee,” “director,” “officer,” “associate,” “consultant,” “agent,” and “independent contractor” shall include any person with such status at any time during the twelve (12) months prior to the termination of Participant’s employment and for twelve (12) months following termination of Participant’s employment. Participant shall not be deemed to have violated the provisions of this Section 7 by reason of an isolated act, or failure to act, not taken in bad faith.

8.Miscellaneous.

(a)This Award shall not confer upon Participant any right to continue in the service as an employee, officer, director, consultant or advisor of the Company or any Subsidiary Company.

(b)The address for Participant to which notice, demands and other communications to be given or delivered under or by reason of the provisions hereof shall be Participant’s address as reflected in the Company’s personnel records, or such other address as Participant may provide to the Company by written notice.

(c)The validity, performance, construction and effect of this Award shall be governed by the laws of the Commonwealth of Pennsylvania, without giving effect to principles of conflicts of law.

(d)Participant hereby irrevocably and unconditionally consents to submit to the exclusive jurisdiction of the courts of the Commonwealth of Pennsylvania and of the United States of America, in each case located in Philadelphia, Pennsylvania, for any actions, suits or proceedings arising out of or relating to this Award and the transactions contemplated hereby (“Litigation”) and agrees not to commence any Litigation except in any such court, and further agrees that service of process, summons, notice or document by U.S. registered mail to his respective address shall be effective service of process for any Litigation brought against him in any such court. Each party hereby irrevocably and unconditionally waives any objection to the laying of venue of any Litigation in the courts of the Commonwealth of Pennsylvania or of the United States of America, in each case located in Philadelphia, Pennsylvania, and hereby further irrevocably and unconditionally waives and agrees not to plead or claim in any such court that any Litigation brought in any such court has been brought in an inconvenient forum.

9.Incorporation of Plan Terms and Conflict with Other Agreements.

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(a)This Award is subject to the terms and conditions of the Plan, including, but not limited to, those pertaining to (i) change in capitalization of the Company, (ii) clawback and recoupment, (iii) the Committee’s authority to amend, interpret, and administer the Award and the Plan, and (iv) issuance of Shares upon vesting and payment therefor. Such terms and conditions of the Plan are incorporated into and made a part of this Award by reference. In the event of any conflicts between the provisions of this Award and the terms of the Plan, the terms of the Plan will control. Capitalized terms used but not defined in this Award shall have the meanings set forth in the Plan unless the context clearly requires an alternative meaning.

(b)In the event of any conflict between the provisions of this Award and the provisions of any employment, service, restrictive covenant or change-in-control agreement between the Company and Participant, the provisions of such employment, service, restrictive covenant or change-in-control agreement shall prevail. For the avoidance of doubt, to the extent Participant has agreed to the terms of conditions of the Dorman Products, Inc. Executive Severance Plan (the “Severance Plan”), the restrictive covenants in that Severance Plan shall prevail over the restrictive covenants in Section 7 of this Award, both with respect to time and scope, if applicable.

Please confirm your acceptance of this Award electronically by following the instructions on your personal web portal at Dorman’s Equity Administrator. You have until #Grant Accept by Date# to accept your award. Your electronic signature indicates your agreement to be bound by the terms of this Award.

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Exhibit 10.4.16

DORMAN PRODUCTS, INC.

PERFORMANCE RESTRICTED STOCK UNIT AWARD PURSUANT TO THE DORMAN PRODUCTS, INC. 2018 STOCK OPTION AND STOCK INCENTIVE PLAN

THIS PERFORMANCE RESTRICTED STOCK UNIT AWARD (this “Award”)

dated as of #Grant Date# (the “Grant Date”) is entered into by and between Dorman Products, Inc. (the “Company”) and #Participant Name# (the “Participant”).

1.Grant of Performance-Based Restricted Stock Units. Effective as of the Grant Date, pursuant to the Dorman Products, Inc. 2018 Stock Option and Stock Incentive Plan (the “Plan”), the Company hereby grants to Participant #Number of Shares Granted# performance-based Restricted Stock Units (the “PSUs”), subject to the terms and conditions set forth in this Award and the Plan. This Award is in consideration for Participant’s acceptance of and agreement to the restrictive covenants set forth in Section 7 of this Award.

2.Dividend Equivalents.

(a)The PSUs are granted with dividend equivalent rights. If the Company declares a cash dividend on the Shares, an amount equivalent to such dividend will be credited to an unfunded bookkeeping account with respect to each outstanding and unvested PSU (the “Dividend Equivalent Amount”) on the record date of such dividend.

(b)The Dividend Equivalent Amount will be credited as cash, without interest, and will not be converted to Shares. The Dividend Equivalent Amount will be payable in cash, but only upon the applicable vesting date(s) of the underlying PSUs as determined in accordance with Section 3 below, and will be cancelled and forfeited if the underlying PSUs are cancelled or forfeited as determined in accordance with Section 3 below.

3.Vesting of PSUs.

(a)Subject to the provisions of Sections 3(b) and (c), the vesting of the PSUs is contingent upon (i) the Company’s achievement of the performance target(s) set forth on Exhibit A hereto (“Performance Target(s)”) during the performance period set forth on Exhibit A hereto (“Performance Period”), and (ii) Participant’s continued employment by or provision of services to the Company or a Subsidiaries Company through the end of the Performance Period. Awarded Shares will vest and become nonforfeitable only after certification by the Committee of the achievement of the Performance Targets previously established and approved by the Committee for the Performance Period.

(b)Upon a Change in Control, 100% of the unvested portion of the PSUs (assuming the maximum performance level) shall vest.

(c)If Participant’s employment or service terminates prior to the last day of the Performance Period on account of death or Disability, a pro rata portion of Participant’s PSUs will vest at the end of the Performance Period to the extent the Performance Target(s) for the Performance Period are met. The pro rata portion will be determined by multiplying the PSUs that would have vested at the end of the Performance Period pursuant to Section 3 and Exhibit A if Participant’s employment or service had not terminated prior to the last day of the Performance Period by a fraction, the numerator of which is the number of Participant’s completed months of service during the Performance Period and the denominator of which is the number of months in the Performance Period. Thereafter, the number of Shares deliverable shall be rounded up to the nearest whole Share. Any Shares deliverable under this Section 3(c) shall be delivered at the same time long-term incentive awards are normally paid and/or delivered after the end of the Performance Period.

Except as provided above, upon the termination of employment or service of Participant prior to PSUs vesting in accordance with Exhibit A, any unvested PSUs will immediately and automatically, without any action on the part of the Company, be forfeited and cancelled.

4.Delivery of Shares; Tax Withholding; Securities Laws.

(a)Within thirty (30) days of a Vesting Date, the Company shall (i) pay the Dividend Equivalent Amount (if any) and (ii) deliver Shares issuable with respect to any vested PSUs.

(b)All obligations of the Company to deliver Shares shall be subject to the rights of the Company to withhold amounts required by law for any Federal Insurance Contributions Act (FICA), federal income, state, local and other tax liabilities (“Withholding Taxes”). By accepting this Award, Participant hereby: (i) elects, effective on the date Participant accepts this Award, to sell Shares in an amount having an aggregate Fair Market Value equal to the Withholding Taxes, and to allow the designated broker (the “Broker”) to remit the cash proceeds of such sale to the Company (a “Sell to Cover”); (ii) directs the Company to make a cash payment to satisfy the Withholding Taxes from the cash proceeds of such sale directly to the appropriate taxing authorities; and (iii) represents and warrants that (1) on the date Participant accepts this Award he or she is not aware of any material, nonpublic information with respect to the Company or any securities of the Company, is not subject to any legal, regulatory or contractual restriction that would prevent the Broker from conducting sales, does not have, and will not attempt to exercise, authority, influence or control over any sales of Shares effected by the Broker pursuant to this Award, (2) is entering into the Award and this election to Sell to Cover in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b5-1 (regarding trading of the Company’s securities on the basis of material nonpublic information) under the 1934 Act, and (3) it is Participant’s intent that this election to Sell to Cover comply with the requirements of Rule 10b5-1(c)(1) under the 1934 Act and be interpreted to comply with the requirements of Rule 10b5- 1(c) under the 1934 Act. Participant further acknowledges that by accepting this Award, Participant is adopting a 10b5-1 Plan to permit Participant to conduct a Sell to Cover sufficient to

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satisfy the Withholding Taxes. All obligations to pay any Dividend Equivalent Amount will be paid net of any Withholding Taxes.

5.Assignments, Transfers and Successors and Assigns. The rights and interests of Participant under this Award may not be assigned, sold, exchanged, transferred, pledged, hypothecated or otherwise disposed of except by will or the laws of descent and distribution. The rights and protections of the Company hereunder shall extend to any successors or assigns of the Company and to the Company’s parent(s) and each of its Affiliates. This Award may be assigned by the Company without Participant’s consent.

6.Section 409A. This Award is intended to be exempt from or otherwise comply with the provisions of Section 409A. If the PSUs constitute “deferred compensation” under Section 409A and the PSUs become vested and settled upon Participant’s termination of employment or service, payment with respect to the PSUs shall be delayed for a period of six months after the termination if Participant is a “specified employee” as defined under Section 409A and if required pursuant to Section 409A. If payment is delayed, the PSUs shall be settled and paid within thirty (30) days after the date that is six (6) months following Participant’s termination of employment or service. Payments with respect to the PSUs may only be paid in a manner and upon an event permitted by Section 409A, and each payment under this Award shall be treated as a separate payment, and the right to a series of installment payments shall be treated as a right to a series of separate payments. In no event shall Participant, directly or indirectly, designate the calendar year of payment. The Company may change or modify the terms of this Award without Participant’s consent or signature if the Company determines, in its sole discretion, that such change or modification is necessary for purposes of compliance with or exemption from the requirements of Section 409A.

7.Restrictive Covenants.

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without violating such restrictions is a material condition to Participant’s employment with the Company. Participant agrees to disclose in advance the existence and terms of the restrictions and covenants contained in this Award to any employer or service recipient by whom Participant might be employed or retained during the Restrictions Period.

(d)For purposes of this Section:

(1)“Business” means a supplier of automotive replacement parts, brake parts and fasteners to the automotive aftermarket (including, without limitation, the light, medium and heavy duty truck aftermarket), a supplier of aftermarket parts and accessories to the powersports industry, or a supplier of home fasteners and electrical wiring components to mass merchandisers, or any other business activities of the Company Group accounting for more than ten percent (10%) of its gross sales in the most recently completed fiscal year or reasonably expected to do so in the current fiscal year, in the United States and in any foreign jurisdiction in which the Company Group operates or, at the end of Participant’s employment, proposes to operate.

(2)“Territory” means any state, jurisdiction or territory in the world in which any member of the Company Group is engaged in business during the Restrictions Period.

8.Miscellaneous.

(a)This Award shall not confer upon Participant any right to continue in the service as an employee, officer, director, consultant or advisor of the Company or any Subsidiary Company.

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(c)The validity, performance, construction and effect of this Award shall be governed by the laws of the Commonwealth of Pennsylvania, without giving effect to principles of conflicts of law.

9.Incorporation of Plan Terms and Conflict with Other Agreements.

(a)This Award is subject to the terms and conditions of the Plan, including, but not limited to, those pertaining to (i) change in capitalization of the Company, (ii) clawback and recoupment, (iii) the Committee’s authority to amend, interpret, and administer the Award and the Plan, and (iv) issuance of Shares in accordance herewith. Such terms and conditions of the Plan are incorporated into and made a part of this Award by reference. In the event of any conflicts between the provisions of this Award and the terms of the Plan, the terms of the Plan will control. Capitalized terms used but not defined in this Award shall have the meanings set forth in the Plan unless the context clearly requires an alternative meaning.

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EXHIBIT A


	Metric	Payout
Less than Threshold
Threshold
Target
Maximum

For purposes of this Award:

(a) “Performance Standard” means [one or more of the following performance criteria, either individually, alternatively or in any combination, applied either to the Company as a whole or to a business segment or unit, and measured either annually or cumulatively over a period of years, on an absolute basis or relative to a pre-established target, to a previous year’s results or to a designated comparison group, in each case as specified by the Committee in the agreement evidencing the award of restricted shares: sales, revenue, net income, net earnings, earnings per share, return on the total capital, total shareholder return, return on equity, cash flow, operating profit and margin rate. The Committee may adjust the Performance Standard during a given Performance Period to exclude the impact of any of the following events or occurrences which the Committee determines should appropriately be excluded: (a) asset write-downs and discontinued operations; (b) litigation, claims, judgments or settlements; (c) the effect of changes in tax law or other such laws or regulations affecting reported results; (d) acquisitions, mergers or restructuring costs; and (e) any other extraordinary or unusual items or events applied on a consistent basis. The Committee also may adjust the designated comparison group to account for members that cease to be a public company during the Performance Period (whether by merger, consolidation, liquidation or otherwise) and include additional companies consistent with previously approved methodology for selecting a designated comparison group. Any determination by the Committee pursuant to this Exhibit A will be binding upon each Participant and the Company.]

(b) “Performance Period” means [_________________].

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Exhibit 10.4.17

DORMAN PRODUCTS, INC.
RESTRICTED STOCK UNIT AWARD PURSUANT TO THE
DORMAN PRODUCTS, INC. 2018 STOCK OPTION AND STOCK INCENTIVE PLAN

THIS RESTRICTED STOCK UNIT AWARD (this “Award”) dated as of the #Grant Date# is entered into by and between Dorman Products, Inc. (the “Company”) and Participant.

2.Dividend Equivalents.

3.Vesting of RSUs.

(b)Upon a Change in Control, 100% of the unvested portion of the RSUs shall vest.

(c)Upon Participant’s termination of employment or service for any of the following reasons, the unvested portion of the RSUs shall vest as indicated:

(i)100% as of the date of Participant’s death; or

(ii)100% as of the date of Participant’s termination of employment or service due to Disability.

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4.Delivery of Shares; Tax Withholding; Securities Laws.

(a)Within thirty (30) days of a Vesting Date, the Company shall (i) pay the Dividend Equivalent Amount (if any) and (ii) deliver Shares issuable with respect to any vested RSUs.

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7.Miscellaneous.

(a)This Award shall not confer upon Participant any right to continue in the service as an employee, officer, director, consultant or advisor of the Company or any Subsidiary Company.

(c)The validity, performance, construction and effect of this Award shall be governed by the laws of the Commonwealth of Pennsylvania, without giving effect to principles of conflicts of law.

8.Incorporation of Plan Terms and Conflict with Other Agreements.

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(a)This Award is subject to the terms and conditions of the Plan, including, but not limited to, those pertaining to (i) change in capitalization of the Company, (ii) clawback and recoupment, and (iii) the Committee’s authority to amend, interpret, and administer the Award and the Plan. Such terms and conditions of the Plan are incorporated into and made a part of this Award by reference. Capitalized terms used but not defined in this Award shall have the meanings set forth in the Plan unless the context clearly requires an alternative meaning.

(b)Restrictive Covenants

(i) In the event of any conflict between the provisions of this Award and the provisions of any employment, service, restrictive covenant or change-in-control agreements between the Company and Participant (each, an “Employment Agreement”), the provisions of such Employment Agreement shall prevail. Notwithstanding the foregoing, this Award is subject to the terms and conditions of the Plan and, in the event the terms and conditions of this Award conflict with the terms and conditions of the Plan, the terms and conditions of the Plan shall prevail.

(ii)The non-competition and non-solicitation covenants contained in any Employment Agreement are necessary for the protection of the business and goodwill of the Company and are considered by Participant to be reasonable for such purpose. Participant acknowledges that a breach of any such covenants may cause irreparable damage to the Company and its subsidiaries and affiliates, the exact amount of which would be difficult to ascertain, and that the remedies at law for any such breach or threatened breach would be inadequate. Accordingly, Participant agrees that if Participant breaches or threatens to breach any such covenants, then in addition to any other remedy which may be available to the Company under such Employment Agreements, at law or in equity, the Company shall be entitled to institute and prosecute proceedings in any court of competent jurisdiction for specific performance and injunctive relief to prevent the breach or any threatened breach thereof without bond or other security or a showing that monetary damages will not provide an adequate remedy. Furthermore, Participant agrees that if Participant willfully and materially breaches any such covenants, then in addition to any other remedy which may be available to the Company under such Employment Agreements, at law or in equity, the Company shall be entitled to cease or withhold any payment of Shares to Participant pursuant to this Award, including the return of any previously delivered Shares or proceeds recognized upon any sale or other disposition of those Shares. Participant agrees to disclose in advance the existence and terms of the restrictions and covenants contained in this Award and in any Employment Agreements to any employer or service recipient by whom Participant might be employed or retained during the time in which such restrictive covenants in such Employment Agreements are in effect.

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Exhibit 10.4.18

DORMAN PRODUCTS, INC.

PERFORMANCE RESTRICTED STOCK UNIT AWARD PURSUANT TO THE DORMAN PRODUCTS, INC. 2018 STOCK OPTION AND STOCK INCENTIVE PLAN

THIS PERFORMANCE RESTRICTED STOCK UNIT AWARD (this “Award”)

dated as of #Grant Date# (the “Grant Date”) is entered into by and between Dorman Products, Inc. (the “Company”) and #Participant Name# (the “Participant”).

2.Dividend Equivalents.

(b)The Dividend Equivalent Amount will be credited as cash, without interest, and will not be converted to Shares. The Dividend Equivalent Amount will be payable in cash, but only upon the applicable vesting date(s) of the underlying PSUs as determined in accordance with Section 3 below, and will be cancelled and forfeited if the underlying PSUs are cancelled or forfeited as determined in accordance with Section 3 below.

3.Vesting of PSUs.

(b)Upon a Change in Control, 100% of the unvested portion of the PSUs (assuming the maximum performance level) shall vest.

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the Performance Period. Thereafter, the number of Shares deliverable shall be rounded up to the nearest whole Share. Any Shares deliverable under this Section 3(c) shall be delivered at the same time long-term incentive awards are normally paid and/or delivered after the end of the Performance Period.

4.Delivery of Shares; Tax Withholding; Securities Laws.

(a)Within thirty (30) days of a Vesting Date, the Company shall (i) pay the Dividend Equivalent Amount (if any) and (ii) deliver Shares issuable with respect to any vested PSUs.

(b)All obligations of the Company to deliver Shares shall be subject to the rights of the Company to withhold amounts required by law for any Federal Insurance Contributions Act (FICA), federal income, state, local and other tax liabilities (“Withholding Taxes”). By accepting this Award, Participant hereby: (i) elects, effective on the date Participant accepts this Award, to sell Shares in an amount having an aggregate Fair Market Value equal to the Withholding Taxes, and to allow the designated broker (the “Broker”) to remit the cash proceeds of such sale to the Company (a “Sell to Cover”); (ii) directs the Company to make a cash payment to satisfy the Withholding Taxes from the cash proceeds of such sale directly to the appropriate taxing authorities; and (iii) represents and warrants that (1) on the date Participant accepts this Award he or she is not aware of any material, nonpublic information with respect to the Company or any securities of the Company, is not subject to any legal, regulatory or contractual restriction that would prevent the Broker from conducting sales, does not have, and will not attempt to exercise, authority, influence or control over any sales of Shares effected by the Broker pursuant to this Award, (2) is entering into the Award and this election to Sell to Cover in good faith and not as part of a plan or scheme to evade the prohibitions of Rule 10b5-1 (regarding trading of the Company’s securities on the basis of material nonpublic information) under the 1934 Act, and (3) it is Participant’s intent that this election to Sell to Cover comply with the requirements of Rule 10b5-1(c)(1) under the 1934 Act and be interpreted to comply with the requirements of Rule 10b5- 1(c) under the 1934 Act. Participant further acknowledges that by accepting this Award, Participant is adopting a 10b5-1 Plan to permit Participant to conduct a Sell to Cover sufficient to satisfy the Withholding Taxes. All obligations to pay any Dividend Equivalent Amount will be paid net of any Withholding Taxes.

5.Assignments, Transfers and Successors and Assigns. The rights and

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interests of Participant under this Award may not be assigned, sold, exchanged, transferred, pledged, hypothecated or otherwise disposed of except by will or the laws of descent and distribution. The rights and protections of the Company hereunder shall extend to any successors or assigns of the Company and to the Company’s parent(s) and each of its Affiliates. This Award may be assigned by the Company without Participant’s consent.

7.Miscellaneous.

(a)This Award shall not confer upon Participant any right to continue in the service as an employee, officer, director, consultant or advisor of the Company or any Subsidiary Company.

(c)The validity, performance, construction and effect of this Award shall be governed by the laws of the Commonwealth of Pennsylvania, without giving effect to principles of conflicts of law.

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8.Incorporation of Plan Terms and Conflict with Other Agreements.

(a)This Award is subject to the terms and conditions of the Plan, including, but not limited to, those pertaining to (i) change in capitalization of the Company, (ii) clawback and recoupment, (iii) the Committee’s authority to amend, interpret, and administer the Award and the Plan, and (iv) the issuance of Shares in accordance herewith. Such terms and conditions of the Plan are incorporated into and made a part of this Award by reference. Capitalized terms used but not defined in this Award shall have the meanings set forth in the Plan unless the context clearly requires an alternative meaning.

(b)Restrictive Covenants

(ii) The non-competition and non-solicitation covenants contained in any Employment Agreement are necessary for the protection of the business and goodwill of the Company and are considered by Participant to be reasonable for such purpose. Participant acknowledges that a breach of any such covenants may cause irreparable damage to the Company and its subsidiaries and affiliates, the exact amount of which would be difficult to ascertain, and that the remedies at law for any such breach or threatened breach would be inadequate. Accordingly, Participant agrees that if Participant breaches or threatens to breach any such covenants, then in addition to any other remedy which may be available to the Company under such Employment Agreements, at law or in equity, the Company shall be entitled to institute and prosecute proceedings in any court of competent jurisdiction for specific performance and injunctive relief to prevent the breach or any threatened breach thereof without bond or other security or a showing that monetary damages will not provide an adequate remedy. Furthermore, Participant agrees that if Participant willfully and materially breaches any such covenants, then in addition to any other remedy which may be available to the Company under such Employment Agreements, at law or in equity, the Company shall be entitled to cease or withhold any payment of Shares to Participant pursuant to this Award, including the return of any previously delivered Shares or proceeds recognized upon any sale or other disposition of those Shares. Participant agrees to disclose in advance the existence and terms of the restrictions and covenants contained in this Award and in any Employment Agreements to any employer or service recipient by whom Participant might be employed or retained during the time in which such restrictive covenants in such Employment Agreements are in effect.

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EXHIBIT A


	Metric	Payout
Less than [Threshold]
Threshold
Target
Maximum

For purposes of this Award:

(b) “Performance Period” means [_________________].

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Exhibit 19

DORMAN PRODUCTS, INC.

Insider Trading Policy

(Approved by the Board of Directors on February 23, 2023)

This Insider Trading Policy (“Policy”) provides the standards of Dorman Products, Inc. (“Dorman” or the “Company”) with respect to transactions in securities of the Company and the handling of confidential information about Dorman and the companies with which Dorman does business. The federal securities laws prohibit insider trading. Insider trading occurs when a person uses material nonpublic information obtained through involvement with the Company to make decisions to engage in transactions in the Company’s securities or transmits such information to any other person who may trade on the information. Please note that this insider trading policy supplements the restrictions set forth in the Dorman Code of Business Conduct and Ethics.

This Policy applies to all transactions in the Company’s securities, including common stock, options and any other securities that the Company may issue, such as preferred stock, notes, bonds and convertible securities, as well as to derivative securities relating to any of the Company’s securities, whether or not issued by the Company (referred to in this Policy as the “Company’s securities”). The term “transactions” or “trading” means broadly any purchase, sale or other transaction to acquire, transfer or dispose of securities, including market option exercises, gifts or other contributions, exercises of stock options granted under the Company’s stock plans, sales of stock acquired upon the exercise of options and the vesting of restricted stock and restricted stock units and trades made under an employee benefit plan.

Section 1 hereof applies to all members of the Company’s board of directors and all officers and employees of the Company and its subsidiaries. Section 1 of this Policy also applies to such persons’ family members who live in such persons’ households, other members of such persons’ households and entities controlled by such persons, as described in more detail below. The Company may also determine that other persons should be subject to Section 1 of this Policy, such as contractors or consultants. Section 2 hereof applies to all directors and executive officers of the Company, the employees listed in Appendix A hereto and any other individuals designated from time to time. Section 2 of this Policy also applies to such persons’ family members who live in such persons’ households, other members of such persons’ households and entities controlled by such persons, as described in more detail below. Section 3 hereof sets forth additional requirements applicable to directors and executive officers of the Company under Section 16 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”).

If this Policy applies to you, it also applies to family members who reside with you (including a spouse, a child, a child away at college, stepchildren, grandchildren, parents, stepparents, grandparents, siblings, in-laws and adoptive relationships) or are financially dependent on you, and also includes other family members whose transactions in securities are directed by you or are subject to your influence or control. This Policy does not apply to other family members who do not reside with you, who are not financially dependent on you, and whose transactions in securities are not directed by you and are not subject to your influence or control. This Policy also applies to any other person who lives in your household and to any legal entities (such as a corporation, partnership or trust) that are influenced or controlled by you or other persons who have a relationship with you and are subject to this Policy.

Transactions by your family members subject to this Policy and other persons subject to this Policy who have a relationship with you should be treated for the purposes of this Policy as if they were for your own account. Accordingly, all references to you with regard to all trading restrictions and pre-clearance procedures in this Policy also apply to your family members or other persons with whom you have a relationship who are subject to this Policy. You are personally responsible for the actions of your family members or other persons with whom you have a relationship who are subject to this Policy.

The Company has appointed the General Counsel as the Compliance Officer for this Policy. All determinations and interpretations by the Compliance Officer shall be final and not subject to further review. The Compliance Officer’s approval of a transaction submitted for pre-clearance does not

constitute legal advice, does not constitute confirmation that you do not possess material nonpublic information and does not relieve you of any of your legal obligations.

Any violation of this Policy may result in immediate dismissal and may subject you to both civil and criminal penalties. This is an extremely important matter, and we urge you to read the following with care. If you have any questions about this Policy, including its application to any proposed transaction, you may obtain additional guidance from the Senior Vice President & General Counsel or the Vice President, Associate General Counsel. Do not try to resolve uncertainties on your own, as the rules relating to insider trading are often complex, not always intuitive and carry severe consequences.

Section 1:Trading Restrictions and Guidelines

A.General Policy - Prohibition Against Trading On or Tipping Material Nonpublic Information

It is the policy of Dorman that no director, officer or other employee of the Company (or any other person designated by this Policy or by the Compliance Officer as subject to this Policy) who is aware of material nonpublic information relating to Dorman may, directly, or indirectly through family members or other persons or entities:

1.Engage in transactions in Company securities, except as otherwise specified in this Policy under the heading “Certain Exceptions to the Trading Restrictions in this Policy.”

2.Recommend the purchase or sale of any Company securities; or

3.Communicate material nonpublic information concerning Dorman to any other person (including relatives, friends or business associates), except to the extent necessary to perform authorized work for Dorman or as required or specifically permitted by law or legal process. Nor should such information be discussed with any person within Dorman under circumstances where it could be overheard. Written information should be appropriately safeguarded and should not be left where it may be seen by persons not entitled to the information.

In addition, it is the policy of the Company that no director, officer or other employee of the Company (or any other person designated by this Policy or by the Compliance Officer as subject to this Policy) who learns, in the course of employment with the Company or the performance of services on the Company’s behalf, material nonpublic information about another company with which the Company proposes to, or does, business, including a vendor, customer or supplier of the Company, may (i) trade in that company’s securities until the information becomes public or is no longer material, or (ii) communicate that information or make any recommendation relating to the buying or selling of securities of such company to any other person, including family and friends, business associates, or in any consulting capacity.

There are no exceptions to this Policy, except as specifically noted herein. Transactions that may be necessary or justifiable for independent reasons (such as the need to raise money for an emergency expenditure), or small transactions, are not excepted from this Policy. The securities laws do not recognize any mitigating circumstances, and, in any event, even the appearance of an improper transaction must be avoided to preserve the Company’s reputation for adhering to the highest standards of conduct. This means that you may have to forgo a proposed transaction in the Company’s or another company’s securities even if you planned to make the transaction before learning the material nonpublic information and even though you believe that waiting may cause you to suffer an economic loss or not realize anticipated profit.

This Policy applies to certain elections you may make under the Company’s 401(k) Plan, including: (a) an election to make an intra-plan transfer of an existing account balance out of the Company stock fund; (b) an election to borrow money against your 401(k) Plan account if the loan will result in a liquidation of some or all of your Company stock fund balance and (c) the sale of any shares acquired through the 401(k) Plan.

This Policy continues to apply to transactions in Company securities even after termination of service to Dorman. If an individual is in possession of material nonpublic information when his or her service terminates, that individual may not trade in Company securities until that information has become public or is no longer material. Unless notified otherwise by the Company, for persons described in Section 2 of this Policy who leave during a closed window period, the trading window and pre-clearance requirements set forth in Section 2 continue to apply until the opening of the next quarterly window period after termination of service to Dorman.

B.Blackout periods for any or all personnel

The Compliance Officer may issue instructions from time to time advising some or all personnel that they may not engage in transactions in Company securities for certain periods, or that our securities may not be traded without prior approval. Due to the confidential nature of the events that may trigger these sorts of blackout periods, the Compliance Officer may find it necessary to inform affected individuals of a blackout period without disclosing the reason. If you are a director or an executive officer, you may also be subject to event-specific blackouts pursuant to the SEC’s Regulation BTR (Blackout Trading Restriction). This regulation prohibits certain sales and other transfers by insiders during specified pension plan blackout periods. If you are made aware of such a blackout period, do not disclose its existence to anyone.

C.Definitions

Material Information. Material information is any information that a reasonable investor would consider important in determining whether to buy, sell or hold securities. Positive or negative information may be material to investors. A determination as to whether information is material depends on all of the related facts and circumstances. Material information is not limited to historical facts but may also include projections and forecasts.

Information that you should consider material includes, but is not limited to:

•earnings information and annual and quarterly results;

•financial forecasts, including earnings estimates;

•changes in previously released forecasts;

•significant merger, acquisition or divestiture proposals, negotiations or agreements;

•major customer wins or losses;

•major supplier delays, negotiations or agreements;

•significant changes in the Company’s prospects;

•significant product recalls;

•significant or unusual borrowing or liquidity issues;

•equity or debt offerings;

•purchases or redemptions of securities;

•changes in management or the Company’s board of directors;

•significant related party transactions;

•development of a significant new product or service;

•a significant disruption in the Company’s operations or loss, potential loss, breach or unauthorized access of its property or assets, including its facilities and information technology infrastructure; and

•pending or threatened significant litigation or government agency investigation, or the resolution of such litigation or investigation.

Nonpublic Information. Information that has not been disclosed to the public is generally considered to be nonpublic information. Information is considered to be public when it has been released in a manner that is reasonably designed to provide broad, non-exclusionary distribution (e.g., by means of a press release or an SEC filing) and after enough time has elapsed to permit the investment market to absorb and evaluate the information. As a general rule, information should not be considered fully absorbed by the market until after the second business day after the day on which the information is released. Note that the information disseminated must be some form of “official” announcement. In other words, the fact that rumors, speculation, or statements attributed to unidentified sources are public is insufficient to be considered broadly distributed even when the information is accurate.

D.Certain Exceptions to the Trading Restrictions in this Policy

The trading restrictions in this Policy, including those set forth in Section 2, do not apply in the case of the following transactions, except as specifically noted:

Exercise of Stock Options. The trading restrictions in this Policy do not apply to the exercise of an employee stock option acquired pursuant to the Company’s plans, or to the exercise of a tax withholding right pursuant to which a person has elected to have the Company withhold shares subject to an option to satisfy tax withholding requirements, provided, however, that if you are subject to the pre-clearance procedures discussed in Section 2.B below, you must obtain pre-clearance prior to any exercise of stock options. The trading restrictions in this Policy do apply, however, to any sale of stock received upon exercise, including as part of a broker-assisted cashless exercise of an option, or any other market sale for the purpose of generating the cash needed to pay the exercise price of an option.

Vesting of Restricted Stock and Restricted Stock Unit Awards. The trading restrictions in this Policy do not apply to the vesting of restricted stock or restricted stock units, or the exercise of a tax withholding right pursuant to which you elect to have the Company withhold shares of stock to satisfy tax withholding requirements upon the vesting of any restricted stock or restricted stock unit. The trading restrictions in this Policy do apply, however, to any market sale of restricted stock and shares of stock received upon the vesting of restricted stock units.

Employee Stock Purchase Plan (“ESPP”). This Policy does not apply to purchases of the Company’s securities in the Company’s ESPP resulting from your periodic contribution of money to the plan pursuant to your payroll deduction election which election was made in accordance with the terms of the Company’s ESPP at a time when you did not possess material non-public information regarding the Company. This Policy does apply, however, to certain elections you may make under the ESPP, including: (a) an election to increase or decrease the amount of your payroll contributions; and (b) an election to make an optional contribution to the ESPP. In addition, this Policy does apply to the sale of the shares of Company stock purchased under the ESPP. Directors, executive officers and Designated Contributors, as well as their respective family members who reside with you, household members and entities controlled by such persons, may only make an election to participate in the ESPP, change the amount of their payroll contributions, make optional contributions or sell shares of Company stock purchased under the ESPP during a quarterly window period, as described in Section 2 below.

10b5-1 Trading Plan. A Rule 10b5-1 trading plan is a binding, written contract between you and your broker that specifies the price, amount, and date of trades to be executed in your account in the future or provides a formula or mechanism that your broker will follow (a “Rule 10b5-1 Plan”). The trading restrictions in this Policy do not apply to purchases or sales of the Company’s securities pursuant to a pre-approved Rule 10b5-1 trading program, except as provided below. Implementation of a trading plan under Rule 10b5-1 under the Exchange Act provides an affirmative defense (which must be proven) from insider trading liability under Rule 10b-5. A Rule 10b5-1 Plan must be entered into at a time when the person entering into the plan is not aware of material nonpublic information. Once the plan is adopted, the person must not exercise any influence over the amount of securities to be traded, the price at which they are to be traded or the date of the trade. The plan must either specify the amount, pricing and timing of transactions in advance or delegate discretion on these matters to an independent third party.

A person subject to this Policy may enter into a Rule 10b5-1 Plan covering trading in Company securities only if such person has submitted a written representation to the Compliance Officer that he or she is not

in possession of material nonpublic information and if such person has received the prior written approval of the Compliance Officer (which approval may include an email confirmation). Any Rule 10b5-1 Plan must be submitted to the Compliance Officer for approval five business days prior to the adoption of the Rule 10b5-1 Plan.

Additionally, a Rule 10b5-1 Plan adopted by a person subject to this Policy is subject to the following requirements:

•The Rule 10b5-1 Plan must have a “cooling-off” period as set forth below:

oFor directors and executive officers of the Company (the “Section 16 Insiders”), the Rule 10b5-1 Plan must include a “cooling-off” period from the effective date of a Rule 10b5-1 Plan, during which time no trades may take place pursuant to the Rule 10b5-1 Plan (a “Cooling-Off Period”), that is the later of (i) 90 days following the adoption of the Rule 10b5-1 Plan or (ii) two business days following the disclosure of the Company’s financial results in a Form 10-Q or Form 10-K for the completed fiscal quarter in which the Rule 10b5-1 Plan was adopted; and

oFor all other employees, the Rule 10b5-1 Plan must include a 30-day Cooling-Off Period.

•The duration of any Rule 10b5-1 Plan must be at least six months.

•A Rule 10b5-1 Plan may not be adopted if a person already has an existing contract, instruction or plan that would qualify for the affirmative defense under Rule 10b5-1, subject to the exceptions set forth therein.

•Any early termination of a Rule 10b5-1 Plan must occur during an open trading window, and the Compliance Officer must be notified in writing of the termination and the reasons for the termination.

•Any amendments to a Rule 10b5-1 Plan, including to the terms specified above, must be approved in writing by the Compliance Officer.

Rule 10b5-1 Plans must otherwise comply with the conditions and limitations set forth in Rule 10b5-1 of the Exchange Act. Once a Rule 10b5-1 Plan is adopted, no further pre-approval of transactions conducted pursuant to the pre-approved Rule 10b5-1 Plan will be required. Trading outside of a Rule 10b5-1 Plan generally should not occur, and any proposed trades outside of the Rule 10b5-1 Plan are subject to the pre-clearance requirements of this Policy, as described in Section 2 below. The Compliance Officer may grant exceptions to the Policy’s requirements regarding Rule 10b5-1 Plans in appropriate circumstances. Any request for an exception must be submitted in writing to the Compliance Officer.

E.Violations of Insider Trading Laws

Penalties for trading on or communicating material nonpublic information can be severe, both for individuals involved in such unlawful conduct and their employers and supervisors, and may include jail terms, criminal fines, civil penalties and civil enforcement injunctions. Given the severity of the potential penalties, compliance with this Policy is absolutely mandatory. Individuals also may be prohibited from serving as directors or officers of the Company or any other public company. Keep in mind that there are no limits on the size of a transaction that will trigger insider trading liability; relatively small trades have in the past occasioned SEC investigations and lawsuits.

Legal Penalties. A person who violates insider trading laws by engaging in transactions in a company’s securities when he or she has material nonpublic information can be sentenced to a substantial jail term and required to pay a penalty of several times the amount of profits gained or losses avoided. In addition, a person who tips others may also be liable for transactions by the tippees to whom he or she has disclosed material nonpublic information. Tippers can be subject to the same penalties and sanctions as

the tippees, and the SEC has imposed large penalties even when the tipper did not profit from the transaction.

The SEC can also seek substantial penalties from any person who, at the time of an insider trading violation, “directly or indirectly controlled the person who committed such violation,” which could apply to the Company and/or management and supervisory personnel.

Company-imposed Penalties. An individual who violates this Policy may be subject to disciplinary action by the Company, including dismissal or removal for cause.

F.Additional Guidelines

The Company considers it improper and inappropriate for those employed by or associated with the Company to engage in short-term or speculative transactions in the Company’s securities or in other transactions in the Company’s securities that may lead to inadvertent violations of the insider trading laws. It therefore is the Company’s policy that any persons covered by this Policy may not engage in any of the following transactions (even if they do not possess material nonpublic information):

Short Sales. You may not engage in short sales of the Company’s securities (sales of securities that are not then owned), including a “sale against the box” (a sale with delayed delivery). Short sales of Company securities may evidence an expectation on the part of the seller that the securities will decline in value, and therefore have the potential to signal to the market that the seller lacks confidence in the Company’s prospects. In addition, short sales may reduce a seller’s incentive to seek to improve the Company’s performance. For these reasons, short sales of Company securities are prohibited.

Publicly Traded Options. You may not engage in transactions in publicly traded options related to the Company’s securities, such as puts, calls and other derivative securities, on an exchange or in any other organized market. Given the relatively short term of publicly traded options, transactions in options related to the Company’s securities may create the appearance that a director, officer or employee is trading based on material nonpublic information and focus a director’s, officer’s or other employee’s attention on short-term performance at the expense of the Company’s long-term objectives. Accordingly, transactions in publicly traded options related to the Company’s securities on an exchange or in any other organized market are prohibited by this Policy.

Hedging Transactions. Hedging transactions (transactions that hedge or offset, or are designed to hedge or offset, any decrease in the market value of the Company’s equity securities) can be accomplished through a number of possible mechanisms, including through the use of financial instruments such as prepaid variable forwards, equity swaps, collars and exchange funds. Such hedging transactions may permit a director, officer or employee to continue to own Company securities obtained through employee benefit plans or otherwise, but without the full risks and rewards of ownership. When that occurs, the director, officer or employee may no longer have the same objectives as the Company’s other shareholders. Therefore, directors, officers and employees are prohibited from engaging in any such transactions.

Margin Accounts and Pledges. Securities held in a margin account or pledged as collateral for a loan may be sold without your consent by the broker if you fail to meet a margin call or by the lender in foreclosure if you default on the loan. A margin or foreclosure sale that occurs when you are aware of material nonpublic information may, under some circumstances, result in unlawful insider trading. Therefore, directors, officers and employees are prohibited from holding Company securities in margin accounts or pledging Company securities as collateral for a loan.

Section 2:Additional Restrictions on Trading Applicable to Directors, Executive Officers, and Designated Contributors

Section 2 of this Policy imposes additional trading restrictions and applies to all directors and executive officers of the Company and the employees listed in Appendix A hereto (“Designated Contributors”) as well as certain other persons designated from time to time by the Compliance Officer. This section of the Policy also applies to family members who reside with persons subject to this section of the Policy, other

members of such persons’ households and entities controlled by a person subject to this section of the Policy.

A.Trading Window Periods

Quarterly Trading Windows. Directors, executive officers and Designated Contributors, as well as their respective family members who reside with them, household members and entities controlled by such persons, can only engage in transactions in Company securities during an “open” “window period,” and only so long as such person does not have any material nonpublic information about Dorman. Dorman has established four regular “trading windows” of time during the fiscal year. The “trading windows” generally open at market open one full trading day after the time at which Dorman files its Quarterly Report on Form 10-Q or Annual Report on Form 10-K for the prior fiscal quarter or fiscal year, as the case may be, continuing through close of business on the 15th day of the final month of each fiscal quarter (i.e. March 15th, June 15th, September 15th, and December 15th). For example, if Dorman files its Form 10-Q after the market closes on May 2, the trading window would open with the opening of the market on May 4, assuming May 2, 3, and 4 are trading days. If Dorman files its Form 10-Q before the market opens on May 2, the trading window would open with the opening of the market on May 3, assuming May 2 and 3 are trading days. Because directors, executive officers, and Designated Contributors are especially likely to receive regular nonpublic information regarding Dorman’s operations, limiting trading to this “window period” helps prevent trading that is based on material information that is not available to the public. Before trading in Company securities during the “window period,” directors, executive officers, and Designated Contributors, as well as their respective family members who reside with them, household members and entities controlled by such persons, must also comply with the pre-clearance procedures discussed below.

Under certain very limited circumstances, a person subject to this restriction may request to trade when the quarterly trading window is closed, but only if the person does not in fact possess material nonpublic information. Persons wishing to trade when the quarterly trading window is closed must contact the Compliance Officer for approval at least two business days in advance of any proposed transaction involving Company securities. Such request may be granted in the sole discretion of the Compliance Officer. Exceptions to the trading window period policy are granted infrequently and only in exceptional circumstances.

Event-Specific Trading Restriction Periods. As described in Section 1(B) above, from time to time, an event may occur that is material to the Company (such as negotiation of mergers, acquisitions or dispositions) and is known by only a few directors, officers and/or employees. So long as the event remains material and nonpublic, persons designated by the Compliance Officer may not engage in transactions in Company securities. The existence of an event-specific trading restriction period will not be announced to the Company as a whole and should not be communicated to any other person. If the Company declares an event-specific trading restriction period to which you are subject, a member of the legal department will notify you when the restricted period begins and ends. Even if the Compliance Officer has not designated you as a person who should not trade due to an event-specific restriction, you should not trade while aware of material nonpublic information. Exceptions will not be granted during an event-specific trading restriction period.

B.Pre-Clearance

Dorman requires that all directors, executive officers and Designated Contributors, as well as their respective family members who reside with them, household members and entities controlled by such persons, obtain prior written approval from the Compliance Officer (which approval may include an email confirmation) before engaging in any transaction in Company securities. A request for pre-clearance should be submitted to the Compliance Officer at least two business days in advance of the proposed transaction. The Compliance Officer is under no obligation to approve a transaction submitted for pre-clearance and may determine not to permit the transaction. If a person seeks pre-clearance and permission to engage in the transaction is denied, then he or she should refrain from initiating any transaction in Company securities and should not inform any other person of the restriction. If approved, the transaction must be completed within three business days, but in no event after the expiration of the applicable window period or after a pre-clearance has been withdrawn. If the transaction does not occur

during the three-business day period, pre-clearance of the transaction must be re-requested. A form of “Request for Approval” is attached as Appendix B hereto and should be used to request approval hereunder, unless otherwise notified by the Compliance Officer.

The Compliance Officer’s approval of a transaction submitted for pre-clearance does not constitute legal advice, does not constitute confirmation that you do not possess material nonpublic information and does not relieve you of any of your legal obligations.

The Compliance Officer himself or herself may not engage in a transaction in Company securities unless the Company’s Chief Executive Officer has pre-cleared such transaction.

C.Exceptions

The quarterly trading window and event-specific trading restrictions do not apply to the exempt transactions described in Section 1(D) above.

Section 3:Additional Requirements Applicable to Directors and Officers Pursuant to Section 16 of the Exchange Act.

The Section 16 Insiders (i.e., the directors and executive officers of the Company) are also subject to the reporting and short-swing profit rules under Section 16 of the Exchange Act.

A.Reporting Requirements

Section 16(a) requires the directors and executive officers of the Company to file reports with the SEC that identify their beneficial ownership of the Company’s equity securities and any transactions they make in those securities. A Form 3 must be filed no later than the tenth (10th) calendar day after an individual becomes a director or executive officer of the Company, and any subsequent change in beneficial ownership by a Section 16 Insider must, unless exempt from reporting or eligible for deferred reporting, be reported on a Form 4 filed within two business days. These reports must be filed with the SEC via EDGAR and are therefore immediately publicly available upon filing. Section 16(a) imposes the obligation to file ownership reports with the SEC on the individual insiders, not on the Company. However, the Company must disclose any delinquent Section 16 filers in its annual proxy statement and identify the trading information that was not properly filed. While it is not the Company’s obligation to do so, it is the Company’s practice to assist each of its Section 16 Insiders in filing their Section 16(a) reports. In order to facilitate timely compliance, a Section 16 Insider (or his or her broker) must immediately report (no later than the same day such Section 16 Insider engages in the transaction) detailed trade information, in writing, to the Compliance Officer for all transactions made in Company securities by such insider, any family members who reside in such insider’s household and entities that such insider controls. Although it is the individual responsibility and legal obligation of each director and executive officer to comply with the reporting requirements described herein, the Compliance Officer or his or her designee will, upon being advised of a transaction, endeavor to prepare and, pursuant to a power of attorney, timely file Section 16(a) reports on behalf of each Section 16 Insider.

B.Short-Swing Profit Rules

Section 16(b) provides for the recovery of “short-swing” profits from a Section 16 Insider resulting from certain transactions in Company securities “beneficially owned” by them. Specifically, a Section 16 Insider is required by law to turn over to the Company any “profit” realized upon a purchase followed by a sale, or a sale followed by a purchase, of any equity security of the Company that is beneficially owned by him or her and made within a period of less than six (6) months. A profit may result even if the purchase and sale involve different types of equity securities. Moreover, any sale or purchase may be matched with any purchase or sale within the period such that there may be recoverable “profit” even if there has been no economic benefit to the individual in question. The good faith of a director or executive officer is irrelevant to whether recovery is required under Section 16(b).

Transactions in the Company’s securities by persons related to a Section 16 Insider (e.g., spouse, children, grandchildren and in-laws), or by entities in which he or she may have an indirect interest (e.g.,

partnerships, corporations and trusts) may be attributed to the Section 16 Insider. Accordingly, such related persons or entities should be advised not to engage in trades within six months of trades engaged in by the Section 16 Insider, or engaged in by each other, without considering the implications of the short-swing profit rules.

The above description is a general and non-technical summary of some extremely complex legal requirements and liability provisions. Section 16 Insiders should discuss any proposed transactions with the Compliance Officer before taking action.

Appendix A

DESIGNATED CONTRIBUTORS

Our current Designated Contributors for purposes of our Insider Trading Policy are on file with the Compliance Officer. The Compliance Officer may alter this list of Designated Contributors at any time, in which case the Compliance Officer will provide written notice to any individuals to be added or removed from this list.

A-1

Appendix B

REQUEST FOR APPROVAL TO TRADE COMPANY SECURITIES

Number of Securities (e. g., shares):

Type of Security [check all applicable boxes]

Common stock

Restricted stock

Stock Option

Debt Securities

Dorman Stock Fund Unit

Type of Transaction [check all applicable boxes]

Stock option exercise (must complete applicable exercise form)

Purchase

Optional cash contribution under Employee Stock Purchase Plan

Sale (not under benefit plans)

Gift (Name of Donee)

Rule l0b5-1 Plan (attach a copy of the Rule 10b5-1 Plan to this request form)

Sale under benefit plans (including Dorman’s 401(k) and Employee Stock Purchase Plan)

Broker Contact Information

Company Name

Contact Name

Telephone

Fax

Account Number

Social Security or other Tax Identification Number

Status (check all applicable boxes and complete blanks)

Employee – Citizenship ___________, Country in which you are based ___________________

Board Member

I am not currently in possession of any material nonpublic information relating to Dorman Products, Inc. I hereby certify that the statements made on this form are true and correct. I have also discussed any questions I had with respect to Dorman’s securities trading policy and its applicability to the transactions contemplated hereby with Dorman’s General Counsel or his or her designee.

I understand that clearance may be rescinded prior to effectuating the above transaction if material nonpublic information regarding Dorman Products, Inc. arises and, in the reasonable judgment of Dorman’s General Counsel, or his or her designee, the completion of my trade would be inadvisable. I also understand that the ultimate responsibility for compliance with the insider trading provisions of the federal securities laws rests with me and that clearance of any proposed transaction should not be construed as a guarantee that I will not later be found to have been in possession of material non-public information.

B-1

Signature ___________________________________ Print Name _____________________________

Date: Telephone Number _____________________________
_____________________________________________________________________________________
(office use only)

Request Approved (transaction must be completed within 3 business days after approval)
Request Denied
Request Approved with the following modification
Signature & Date ______________________________________________________________

B-2

Appendix C

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints _________________ with full power of substitution, the undersigned’s true and lawful attorney-in-fact to:

(1) prepare, execute in the undersigned’s name and on the undersigned’s behalf, and submit to the Securities and Exchange Commission (the “SEC”) a Form ID, including amendments thereto, and any other documents necessary or appropriate to obtain codes and passwords enabling the undersigned to make electronic filings with the SEC of reports required by Section 16(a) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or any rule or regulation of the SEC;

(2) execute for and on behalf of the undersigned, in the undersigned’s capacity as an officer and/or director of Dorman Products, Inc. (the “Company”), Forms 3, 4, and 5 in accordance with Section 16(a) of the Exchange Act and the rules thereunder;

(3) do and perform any and all acts for and on behalf of the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4, or 5, complete and execute any amendment or amendments thereto, and timely file such form with the SEC and any stock exchange or similar authority; and

(4) take any other action of any type whatsoever in connection with the foregoing which, in the opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by, the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact’s discretion.

The undersigned hereby grants to such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact’s substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorney-in-fact, in serving in such capacity at the request of the undersigned, is not assuming, nor is the Company assuming, any of the undersigned’s responsibilities to comply with Section 16 of the Exchange Act.

This Power of Attorney shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4, and 5 with respect to the undersigned’s holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorney-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this ___________ day of _______________, 20____.

________________________________________

Signature

________________________________________

Print Name

C-1

Exhibit 21


Significant Subsidiaries of Dorman Products, Inc.

Subsidiary						Jurisdiction
RB Distribution, Inc.						Pennsylvania
RB Management, Inc.						Pennsylvania
DPL Holding Corporation						Delaware
DPL Acquisition Corporation						Delaware
Dayton Parts, LLC						Delaware
Super ATV, LLC						Indiana

Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the registration statements (Nos. 333-157150, 333-160979,033-52946, 333-219547 and 333-225020 ) on Form S-8 of our reports dated February 28, 2024, with respect to the consolidated financial statements of Dorman Products, Inc. and the effectiveness of internal control over financial reporting.

/s/ KPMG LLP

Philadelphia, Pennsylvania
February 28, 2024

Exhibit 31.1

CERTIFICATION

I, Kevin M. Olsen, certify that:

1.I have reviewed this annual report on Form 10-K of Dorman Products, Inc. (the “registrant”);

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a)Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b)Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c)Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d)Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

a)All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 28, 2024


/s/ Kevin M. Olsen
Kevin M. Olsen
President and Chief Executive Officer

Exhibit 31.2

CERTIFICATION

I, David M. Hession, certify that:

1.I have reviewed this annual report on Form 10-K of Dorman Products, Inc. (the “registrant”);

b)Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 28, 2024


/s/ David M. Hession
David M. Hession
Senior Vice President and Chief Financial Officer

Exhibit 32

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350 AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES‑OXLEY ACT OF 2002

This Certification is intended to accompany the Annual Report of Dorman Products, Inc. (the "Company") on Form 10‑K for the period ended December 31, 2023 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), and is given solely for the purpose of satisfying the requirements of 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes‑Oxley Act of 2002. To the best of their knowledge, the undersigned, in their respective capacities as set forth below, hereby certify that:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.


/s/ Kevin M. Olsen
Kevin M. Olsen
President and Chief Executive Officer
Date: February 28, 2024


/s/ David M. Hession
David M. Hession Senior Vice President and
Chief Financial Officer
Date: February 28, 2024

Cover - USD ($)	12 Months Ended
Cover - USD ($)	Dec. 31, 2023	Feb. 22, 2024	Jul. 01, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	0-18914
Entity Registrant Name	DORMAN PRODUCTS, INC.
Entity Incorporation, State or Country Code	PA
Entity Tax Identification Number	23-2078856
Entity Address, Address Line One	3400 East Walnut Street
Entity Address, City or Town	Colmar
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	18915
City Area Code	215
Local Phone Number	997-1800
Title of 12(b) Security	Common Stock, $0.01 Par Value
Trading Symbol	DORM
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1,726,548,778
Entity Common Stock, Shares Outstanding		31,086,242
Documents Incorporated by Reference	DOCUMENTS INCORPORATED BY REFERENCE Certain portions of the registrant's definitive proxy statement, in connection with its 2024 Annual Meeting of Shareholders, to be filed with the Securities and Exchange Commission within 120 days after December 31, 2023, are incorporated by reference into PART III of this Annual Report on Form 10-K.
Entity Central Index Key	0000868780
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information	12 Months Ended
Audit Information	Dec. 31, 2023
Auditor Information [Abstract]
Auditor Firm ID	185
Auditor Name	KPMG LLP
Auditor Location	Philadelphia, Pennsylvania

Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Income Statement [Abstract]
Net sales	$ 1,929,788	$ 1,733,749	$ 1,345,249
Cost of goods sold	1,244,365	1,169,299	882,333
Gross profit	685,423	564,450	462,916
Selling, general and administrative expenses	470,663	393,402	291,365
Income from operations	214,760	171,048	171,551
Interest expense, net	48,061	15,582	2,162
Other income, net	(1,804)	(735)	(377)
Income before income taxes	168,503	156,201	169,766
Provision for income taxes	39,244	34,652	38,234
Net income	129,259	121,549	131,532
Other comprehensive income:
Change in foreign currency translation adjustment	713	(1,863)	(1,440)
Comprehensive Income	$ 129,972	$ 119,686	$ 130,092
Earnings per share:
Basic (dollars per share)	$ 4.11	$ 3.87	$ 4.13
Diluted (dollars per share)	$ 4.10	$ 3.85	$ 4.12
Weighted average shares outstanding:
Basic (in shares)	31,455	31,434	31,810
Diluted (in shares)	31,533	31,543	31,961

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 36,814	$ 46,034
Accounts receivable, less allowance for doubtful accounts of $3,518 and $1,363	526,867	427,385
Inventories	637,375	755,901
Prepaids and other current assets	32,653	39,800
Total current assets	1,233,709	1,269,120
Property, plant and equipment, net	160,113	148,477
Operating lease right-of-use assets	103,476	109,977
Goodwill	443,889	443,035
Intangible assets, net	301,556	322,409
Other assets	49,664	48,768
Total assets	2,292,407	2,341,786
Current liabilities:
Accounts payable	176,664	179,819
Accrued compensation	23,971	19,490
Accrued customer rebates and returns	204,495	192,116
Revolving credit facility	92,760	239,363
Current portion of long-term debt	15,625	12,500
Other accrued liabilities	33,636	35,007
Total current liabilities	547,151	678,295
Long-term debt	467,239	482,464
Long-term operating lease liabilities	91,262	98,221
Other long-term liabilities	9,627	28,349
Deferred tax liabilities, net	8,925	11,826
Commitments and contingencies (Note 10)
Shareholders' equity:
Common stock, par value $0.01; authorized 50,000,000 shares; issued and outstanding 31,299,770 and 31,430,632 shares in 2023 and 2022, respectively	313	314
Additional paid-in capital	101,045	88,750
Retained earnings	1,069,435	956,870
Accumulated other comprehensive loss	(2,590)	(3,303)
Total shareholders' equity	1,168,203	1,042,631
Total liabilities and shareholders' equity	$ 2,292,407	$ 2,341,786

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,518	$ 1,363
Common stock, par value (dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	50,000,000	50,000,000
Common stock, shares issued (in shares)	31,299,770	31,430,632
Common stock, shares outstanding (in shares)	31,299,770	31,430,632

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 26, 2020		32,168,740
Beginning balance at Dec. 26, 2020	$ 853,559	$ 322	$ 64,085	$ 789,152	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		41,700
Exercise of stock options	2,455		2,455
Compensation expense under incentive stock plan	8,228		8,228
Purchase and cancellation of common stock (in shares)		(617,080)
Purchase and cancellation of common stock	(62,756)	$ (6)	(1,111)	(61,639)
Issuance of non-vested stock, net of cancellations (in shares)		28,914
Issuance of non-vested stock, net of cancellations	3,261		3,261
Other stock related activity, net of tax (in shares)		(14,765)
Other stock-related activity, net of tax	(2,103)		533	(2,636)
Other comprehensive loss	(1,440)				(1,440)
Net income	131,532			131,532
Ending balance (in shares) at Dec. 25, 2021		31,607,509
Ending balance at Dec. 25, 2021	932,736	$ 316	77,451	856,409	(1,440)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		18,515
Exercise of stock options	1,046		1,046
Compensation expense under incentive stock plan	9,370		9,370
Purchase and cancellation of common stock (in shares)		(203,765)
Purchase and cancellation of common stock	(19,934)	$ (2)	(367)	(19,565)
Issuance of non-vested stock, net of cancellations (in shares)		27,224
Issuance of non-vested stock, net of cancellations	2,032		2,032
Other stock related activity, net of tax (in shares)		(18,851)
Other stock-related activity, net of tax	(2,305)		(782)	(1,523)
Other comprehensive loss	(1,863)				(1,863)
Net income	$ 121,549			121,549
Ending balance (in shares) at Dec. 31, 2022	31,430,632	31,430,632
Ending balance at Dec. 31, 2022	$ 1,042,631	$ 314	88,750	956,870	(3,303)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options (in shares)		17,489
Exercise of stock options	1,167		1,167
Compensation expense under incentive stock plan	11,484		11,484
Purchase and cancellation of common stock (in shares)		(215,410)
Purchase and cancellation of common stock	(16,493)	$ (2)	(387)	(16,104)
Issuance of non-vested stock, net of cancellations (in shares)		93,437
Issuance of non-vested stock, net of cancellations	1,986	$ 1	1,985
Other stock related activity, net of tax (in shares)		(26,378)
Other stock-related activity, net of tax	(2,544)		(1,954)	(590)
Other comprehensive loss	713				713
Net income	$ 129,259			129,259
Ending balance (in shares) at Dec. 31, 2023	31,299,770	31,299,770
Ending balance at Dec. 31, 2023	$ 1,168,203	$ 313	$ 101,045	$ 1,069,435	$ (2,590)

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Cash Flows from Operating Activities:
Net income	$ 129,259	$ 121,549	$ 131,532
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, amortization and accretion	54,729	44,677	35,193
Provision for doubtful accounts	4,592	86	181
Benefit from deferred income taxes	(2,960)	(5,880)	(11,970)
Provision for stock-based compensation	11,484	9,370	8,228
Fair value adjustment to contingent consideration	(20,468)	0	0
Payment of contingent consideration	0	(120)	(2,418)
Changes in assets and liabilities:
Accounts receivable	(104,020)	48,479	10,918
Inventories	118,606	(133,790)	(153,823)
Prepaids and other current assets	15,324	(11,150)	(2,680)
Other assets	(4,931)	(28)	(5,004)
Accounts payable	(3,138)	(5,542)	47,000
Accrued customer rebates and returns	12,372	2,433	31,275
Accrued compensation and other liabilities	(2,091)	(28,396)	11,906
Cash provided by operating activities	208,758	41,688	100,338
Cash Flows from Investing Activities:
Acquisitions, net of cash acquired	67	(488,956)	(345,483)
Property, plant and equipment additions	(43,968)	(37,883)	(19,840)
Cash used in investing activities	(43,901)	(526,839)	(365,323)
Cash Flows from Financing Activities:
Proceeds of revolving credit line	0	10,000	252,360
Payments of revolving credit line	(146,600)	(10,000)	(13,000)
Proceeds of long-term debt	0	500,000	0
Payments of long-term debt	(12,500)	(3,125)	0
Payment of contingent consideration	0	(1,705)	(7,982)
Payment of debt issuance costs	0	(3,918)	(4,215)
Proceeds from exercise of stock options	1,167	1,046	2,455
Purchase and cancellation of common stock	(15,709)	(19,934)	(62,649)
Other stock-related activity	(467)	132	1,266
Cash (used in) provided by financing activities	(174,109)	472,496	168,235
Effect of exchange rate changes on Cash and Cash Equivalents	32	(93)	(44)
Net (Decrease) Increase in Cash and Cash Equivalents	(9,220)	(12,748)	(96,794)
Cash and Cash Equivalents, Beginning of Period	46,034	58,782	155,576
Cash and Cash Equivalents, End of Period	36,814	46,034	58,782
Supplemental Cash Flow Information
Cash paid for interest expense	49,507	11,647	1,782
Cash paid for income taxes	$ 35,465	$ 62,861	$ 46,225

Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Cash and Cash Equivalents. We consider all highly liquid short-term investments with original maturities of three months or less to be cash equivalents.


(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Sales of accounts receivable	$	949,517	$	1,048,671	$	935,770
Factoring costs	$	50,231	$	37,188	$	11,704

Estimated useful lives by major asset category are as follows:


Buildings and building improvements			10 to 39 years
Machinery, equipment and tooling			3 to 10 years
Software and computer equipment			3 to 10 years
Furniture, fixtures and leasehold improvements			1 to 39 years

Purchase Accounting. The purchase price of an acquired business is allocated to the underlying tangible and intangible assets acquired and liabilities assumed based upon their respective fair market values, with the excess recorded as goodwill. Such fair market value assessments require judgments and estimates which may change over time and may cause the final amounts to differ materially from their original estimates. These adjustments to fair value assessments are recorded to goodwill over the purchase price allocation period which cannot exceed 12 months from the date of acquisition.

Other Assets. Other assets include primarily long-term core inventory, deposits, and equity method investments.

Other Accrued Liabilities. Other accrued liabilities include primarily accrued commissions, accrued income taxes, insurance liabilities, and other current liabilities.

Revenue Recognition and Accrued Customer Rebates and Returns. Revenue is recognized from product sales when goods are shipped, title and risk of loss and control have been transferred to the customer and collection is reasonably assured. We record estimates for cash discounts, defective and slow-moving product returns, promotional rebates, core return deposits, and other discounts in the period of the sale ("Customer Credits"). The provision for Customer Credits is recorded as a reduction from gross sales and reserves for Customer Credits are shown as an increase of accrued customer rebates and returns, which is included in current liabilities. Customer Credits are estimated based on contractual provisions, historical experience, and our assessment of current market conditions. Actual Customer Credits have not differed materially from estimated amounts. Amounts billed to customers for shipping and handling are included in net sales. Costs associated with shipping and handling are included in cost of goods sold.

We expect to implement these new standards by their effective dates, and do not expect their adoption to have an impact on our results of operations, financial condition or cash flows.

Business Acquisitions and Investments

12 Months Ended

Dec. 31, 2023

Business Combination and Asset Acquisition [Abstract]

Business Acquisitions and Investments

Super ATV, LLC (“SuperATV”)

The Transaction was funded in cash through the refinancing of our existing credit facility discussed further in Note 7, "Long-Term Debt."

The table below details the fair values of the assets acquired and the liabilities assumed at the acquisition date:


(in thousands)
Accounts receivable	$	3,317
Inventories	90,428
Prepaids and other current assets	5,293
Property, plant and equipment	23,776
Goodwill	247,474
Identifiable intangible assets	157,500
Operating lease right-of-use assets	11,661
Other Assets	3,001
Accounts payable	(7,436)
Accrued compensation	(2,086)
Accrued customer rebates and returns	(1,609)
Other current liabilities	(8,726)
Long-term operating lease liabilities	(9,508)
Other long-term liabilities	(3,307)
Net cash consideration	509,778

The valuation of the intangible assets acquired, and related amortization periods are as follows:


(in thousands)	Fair Value		Amortization Period (in years)
Product portfolio	82,500		15
Trade names	48,400		20
Customer relationships	26,600		15
Total	$	157,500

As of December 31, 2023, the total amount of goodwill resulting from the SuperATV acquisition that is expected to be deductible for tax purposes is estimated at $400.5 million.

The unaudited pro forma information for the periods set forth below gives effect to the Transaction as if it had occurred as of December 26, 2020, the beginning of the fiscal 2021 period.


	For the Year Ended
(in thousands, except per share data, unaudited)	December 31, 2022		December 25, 2021
Net sales	$	1,888,379	$	1,556,360
Net income	$	130,375	$	143,419
Diluted earnings per share	$	4.13	$	4.49

DPL Holding Corporation (“Dayton Parts”)

The acquisition was funded by cash on hand as well as through the refinancing of our revolving credit facility discussed further in Note 7, "Long-Term Debt."

The table below details the fair values of the assets acquired and the liabilities assumed at the acquisition date, including applicable measurement period adjustments:


(in thousands)
Accounts receivable	$	23,216
Inventories	79,625
Prepaids and other current assets	2,302
Property, plant and equipment	29,900
Goodwill	106,816
Identifiable intangible assets	160,400
Operating lease right-of-use assets	21,248
Other assets	848
Accounts payable	(11,970)
Accrued compensation	(2,784)
Other current liabilities	(7,604)
Long-term operating lease liabilities	(18,444)
Deferred tax liabilities	(38,665)
Net cash consideration	$	344,888

The estimated valuation of the intangible assets acquired, and related amortization periods are as follows:


(in thousands)	Fair Value		Amortization Period (in years)
Customer relationships	$	124,100	20
Product portfolio	25,300		20
Trade names	11,000		10
Total	$	160,400


	For the Year Ended
(in thousands, except per share data, unaudited)	December 25, 2021
Net sales	$	1,468,415
Net income	$	147,090
Diluted earnings per share	$	4.60

Inventories

12 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Inventories

Inventories were as follows:


(in thousands)	December 31, 2023		December 31, 2022
Raw materials	$	29,750	$	34,267
Bulk product	211,805		234,871
Finished product	387,668		478,032
Packaging materials	8,152		8,731
Total	$	637,375	$	755,901

Property, Plant and Equipment

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, plant and equipment include the following:


(in thousands)	December 31, 2023		December 31, 2022
Buildings	$	62,434	$	59,980
Machinery, equipment and tooling	208,086		184,184
Furniture, fixtures and leasehold improvements	17,083		12,225
Software and computer equipment	113,148		100,814
Total	400,751		357,203
Less-accumulated depreciation and amortization	(240,638)		(208,726)
Property, plant and equipment, net	$	160,113	$	148,477

Depreciation and amortization expenses associated with property, plant, and equipment were $31.9 million, $28.6 million, and $26.3 million in fiscal 2023, fiscal 2022, and fiscal 2021, respectively.

Leases

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Leases

Practical Expedients and Accounting Policy Elections

We have made certain accounting policy elections and are using certain practical expedients permitted under GAAP, as follows:

•Include both lease and non-lease components as a single lease component, as non-lease components of contracts have not historically been material.

•Account for leases with terms of one year or less as short-term leases and, as such, are not included in the right-of-use assets or lease liabilities.

2023, fiscal 2022 and fiscal 2021, respectively, which are classified in operating activities on the Consolidated Statements of Cash Flows. The following table summarizes the lease expense:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Operating lease expense	$	21,747	$	17,340	$	9,549
Short-term lease expense	7,169		5,838		3,172
Total lease expense	$	28,916	$	23,178	$	12,721

Supplemental balance sheet information related to our operating leases is as follows:


(in thousands)	December 31, 2023			December 31, 2022
Operating lease right-of-use assets	$	103,476		$	109,977

Other accrued liabilities	$	16,917		$	15,912
Long-term operating lease liabilities	91,262			98,221
Total operating lease liabilities	$	108,179		$	114,133

Weighted average remaining lease term (years)	6.85			7.76
Weighted average discount rate	4.20		%	3.91		%

The following table summarizes the maturities of our lease liabilities for all operating leases as of December 31, 2023:


(in thousands)	December 31, 2023
2024	$	21,061
2025	19,785
2026	19,659
2027	17,802
2028	11,705
Thereafter	34,003
Total lease payments	124,015
Less: Imputed interest	(15,836)
Present value of lease liabilities	$	108,179

Goodwill and Intangible Assets

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets

Goodwill

Goodwill included the following:


(in thousands)	Light Duty		Heavy Duty		Specialty Vehicle		Consolidated
Balance at December 25, 2021	$	—	$	—	$	—	$	197,332
Goodwill acquired	—		—		—		247,247
Foreign currency translation	—		—		—		(1,544)
Balance at December 31, 2022	—		—		—		443,035
Measurement period adjustments	—		—		—		233
Reporting structure reorganization (see Note 8)	313,704		56,637		72,309		—
Foreign currency translation	—		—		—		621
Balance at December 31, 2023	$	313,704	$	56,637	$	72,309	$	443,889

Intangible Assets

Intangible assets, subject to amortization, included the following:


		December 31, 2023						December 31, 2022
Intangible assets subject to amortization	Weighted Average Amortization Period (years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
(dollars in thousands)
Customer relationships	16.2	$	175,430	$	31,678	$	143,752	$	175,430	$	21,643	$	153,787
Trade names	14.9	67,690		10,676		57,014		67,690		6,370		61,320
Product Portfolio	14.6	107,800		9,720		98,080		107,800		2,953		104,847
Technology	4.7	2,167		1,069		1,098		2,167		820		1,347
Patents and Other	6.6	2,230		618		1,612		1,430		322		1,108
Total		$	355,317	$	53,761	$	301,556	$	354,517	$	32,108	$	322,409


(in thousands)
2024	$	22,131
2025	21,998
2026	20,867
2027	20,178
2028	20,004
Thereafter	196,378
Total	$	301,556

Long-Term Debt

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Long-Term Debt


Fiscal Quarter Ending			Principal Amortization Payment Percentage
December 31, 2022 through September 24, 2024			0.625
December 31, 2024 through September 30, 2025			1.25
December 31, 2025 through September 30, 2027			1.875

Segment Information

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Segment Information

Segment results are as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Net Sales:
Light Duty	$	1,462,474	$	1,425,892	$	1,247,465
Heavy Duty	256,913		258,215		97,784
Specialty Vehicle	210,401		49,642		—
Total	$	1,929,788	$	1,733,749	$	1,345,249

Income from operations:
Light Duty	187,159		169,579		182,020
Heavy Duty	14,505		29,738		10,942
Specialty Vehicle	31,618		8,537		—
Total	$	233,282	$	207,854	$	192,962

Depreciation:
Light Duty	$	25,239	$	25,062	$	25,296
Heavy Duty	3,239		2,772		1,034
Specialty Vehicle	3,420		798		—
Total	$	31,898	$	28,632	$	26,330

Capital Expenditures:
Light Duty	$	33,445	$	31,682	$	19,016
Heavy Duty	3,581		4,769		824
Specialty Vehicle	6,942		1,432		—
Total	$	43,968	$	37,883	$	19,840

Segment Assets:
Light Duty	$	1,083,347	$	1,047,987	$	988,371
Heavy Duty	162,583		177,557		131,245
Specialty Vehicle	78,424		106,219		—
Total	$	1,324,354	$	1,331,763	$	1,119,616

A reconciliation of segment adjusted operating income to consolidated income before taxes is as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Segment income from operations	$	233,282	$	207,854	$	192,962
Acquisition-related intangible assets amortization	(21,817)		(14,070)		(6,340)
Acquisition-related transaction and other costs	(15,373)		(22,736)		(15,071)
Fair value adjustment to contingent consideration	20,469		—		—
Executive transition services expenses	(1,801)		—		—
Interest expense, net	(48,061)		(15,582)		(2,162)
Other income, net	1,804		735		377
Consolidated income before income taxes	$	168,503	$	156,201	$	169,766

A reconciliation of segment assets to consolidated assets is as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Segment assets	$	1,324,354	$	1,331,763	$	1,119,616
Other current assets	69,468		85,834		71,830
Other non-current assets	898,585		924,189		481,673
Consolidated assets	$	2,292,407	$	2,341,786	$	1,673,119

Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2023
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Prior to December 1, 2023, we leased our Colmar, PA facility from an entity in which Steven L. Berman, our Non-Executive Chairman, and certain of his family members are owners. On December 1, 2023, the Colmar facility was sold to a third party, subject to our lease. We also lease a portion of our Lewisberry, PA facility from an entity in which Mr. Berman, and certain of his family members are owners. Each lease is a non-cancelable operating lease and expires December 31, 2027. Total rental payments to those entities under these lease arrangements were $2.9 million, $2.5 million, and $2.3 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively. During fiscal 2023 and for the period subsequent to our acquisition of Super ATV in fiscal 2022, we leased our facilities in Madison, IN and Shreveport, LA, from entities in which Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicles, and certain of her family members are owners. Each lease is a non-cancelable operating lease. Total rental payments to those entities under these lease arrangements were $2.6 million in fiscal 2023 and $0.5 million in fiscal 2022. The leases for our operating facilities in Madison, IN and Shreveport, LA were renewed in October 2022 in connection with the acquisition of SuperATV and will expire on October 31, 2027. During fiscal 2023 and for the period subsequent to our acquisition of SuperATV in fiscal 2022, we had a warehouse storage and services agreement with a counterparty that is majority-owned by a family member of Ms. Lindsay Hunt, our President and Chief Executive Officer, Specialty Vehicle. The agreement provides for indoor storage space and material handling services at agreed-upon rates. Total payments under the arrangement were $0.2 million in fiscal 2023 and less than $0.1 million in fiscal 2022. The agreement was signed in October 2020 and expired in October 2023, but was extended on a month-to-month basis. We are a partner in a joint venture with one of our suppliers and own a minority interest in two other suppliers. Purchases from these companies were $22.7 million, $24.9 million and $18.9 million in fiscal 2023, fiscal 2022 and fiscal 2021, respectively.

Income Taxes

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

The components of the income tax provision (benefit) are as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Current:
Federal	$	34,600	$	31,683	$	43,374
State	5,602		7,141		5,755
Foreign	2,002		1,708		1,075
	42,204		40,532		50,204
Deferred:
Federal	(1,936)		(4,003)		(9,609)
State	(338)		(1,022)		(1,368)
Foreign	(686)		(855)		(993)
	(2,960)		(5,880)		(11,970)
Total	$	39,244	$	34,652	$	38,234

The following is a reconciliation of income taxes at the statutory tax rate to the Company's effective tax rate:


	For the Year Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Federal taxes at statutory rate	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.6		2.7		2.1
Research and development tax credit	(0.7)		(0.7)		(0.4)
Federal permanent items	0.3		(0.2)		—
Effect of foreign operations	0.3		—		(0.2)
Other	(0.2)		(0.6)		—
Effective tax rate	23.3	%	22.2	%	22.5	%

At December 31, 2023, we had $4.5 million of unrecognized tax benefits, all of which would affect our effective tax rate if recognized.

The following table summarizes the change in unrecognized tax benefits for the three years ended December 31, 2023:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Balance at beginning of year	$	3,856	$	1,204	$	1,060
Reductions due to lapses in statutes of limitations	(716)		(139)		—
Reductions due to tax positions settled	—		—		—
Additions related to positions taken during a prior period	—		2,136		—
Reductions due to reversals of prior year positions	—		—		(30)
Additions based on tax positions taken during the current period	1,399		655		174
Balance at end of year	4,539		3,856		1,204

Deferred income taxes result from timing differences in the recognition of revenue and expense between tax and financial statement purposes. The sources of temporary differences are as follows:


(in thousands)	December 31, 2023		December 31, 2022
Assets:
Inventories	$	17,829	$	13,662
Accounts receivable	20,472		20,446
Operating lease liability	26,261		24,904
Accrued expenses	19,265		12,526
Net operating losses	289		1,285
Foreign tax credits	469		469
State tax credits	379		403
Capital loss carryforward	478		481
Total deferred tax assets	85,442		74,176
Valuation allowance	(1,354)		(1,377)
Net deferred tax assets	84,088		72,799
Liabilities:
Depreciation	16,481		18,132
Goodwill and intangible assets	49,798		41,693
Operating lease right of use asset	25,142		23,924
Other	1,592		876
Gross deferred tax liabilities	93,013		84,625
Net deferred tax (liabilities) assets	$	(8,925)	$	(11,826)

During 2023, we reduced the valuation allowance against the deferred tax assets noted above by an immaterial amount.

Commitments and Contingencies	12 Months Ended
Commitments and Contingencies	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Shareholders’ Agreement. A shareholders’ agreement was entered into in September 1990 and amended and restated on July 1, 2006. Under the agreement, each of the late Richard Berman, Steven Berman, Jordan Berman, Marc Berman, Fred Berman, Deanna Berman and additional shareholders named in the agreement has, among other things, granted the others of them rights of first refusal, exercisable on a pro-rata basis or in such other proportions as the exercising shareholders may agree, to purchase shares of our common stock which any of them, or upon their deaths their respective estates, proposes to sell to third parties. We have agreed with these shareholders that, upon their deaths, to the extent that any of their shares are not purchased by any of these surviving shareholders and may not be sold without registration under the Securities Act of 1933, as amended (the "1933 Act"), we will use our best efforts to cause those shares to be registered under the 1933 Act. The expenses of any such registration will be borne by the estate of the deceased shareholder. The additional shareholders that are a party to the agreement are trusts affiliated with the late Richard Berman, Steven Berman, Jordan Berman, Marc Berman or Fred Berman, or each person’s respective spouse or children. Acquisitions. We have contingent consideration related to an acquisition due to the uncertainty of the ultimate amount of any payments that will become due as earnout payments if performance targets are achieved. If the remaining performance targets for the acquisition are fully achieved, the maximum additional contingent payments to be made under the transaction documents would be $102.0 million in the aggregate. As of December 31, 2023 and December 31, 2022, we accrued $0.0 million and $20.0 million, respectively, representing the fair value of the estimated payments that we expect could become due in connection with the transaction. For the year ended December 31, 2023, we recorded a net decrease of $20.0 million to the contingent consideration liability, comprising a $20.5 million decrease in fair value based on the modeling of a range of performance outcomes relative to the achievement of targets established in the purchase agreement, partially offset by $0.5 million of accretion on the liability resulting from the passage of time. The net benefit was included in selling, general and administrative expenses in the Condensed Consolidated Statements of Operations. For the year ended December 31, 2022, we recorded a charge of $1.8 million in connection with earnout provisions under a prior acquisition, with the charge included in Selling, General and Administration expenses. During the year ended December 31, 2022, we paid $1.8 million to fully settle this earnout provision associated with the prior acquisition. Other Contingencies. We are a party to or otherwise involved in legal proceedings that arise in the ordinary course of business, such as various claims and legal actions involving contracts, employment claims, competitive practices, intellectual property infringement, product liability claims and other matters arising out of the conduct of our business. In the opinion of management, none of the actions, individually or in the aggregate, taking into account relevant insurance coverage, would likely have a material financial impact on the Company and we believe the range of reasonably possible losses from current matters, taking into account relevant insurance coverage, is immaterial. However, legal matters are subject to inherent uncertainties and there exists the possibility that the ultimate resolution of any of these matters could have a material adverse impact on the Company’s cash flows, financial position and results of operations in the period in which any such effects are recorded.

Revenue Recognition

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Revenue Recognition

Practical Expedients and Accounting Policy Elections

We have made certain accounting policy elections and are using certain practical expedients permitted under GAAP, as follows:

•Expense costs to obtain a contract as incurred when the expected period of benefit, and therefore the amortization period, is one year or less.

•Account for shipping and handling activities that occur after the customer has obtained control of a good as a fulfillment activity rather than a separate performance obligation.

Disaggregated Revenue

For disaggregation of net sales by operating segments, refer to Note 8, "Segment Information", to the Consolidated Financial Statements.

The following table presents our disaggregated net sales by geography.


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Net Sales to U.S. Customers	$	1,772,092	$	1,606,472	$	1,269,050
Net Sales to Non-U.S. Customers	157,696		127,277		76,199
Net Sales	$	1,929,788	$	1,733,749	$	1,345,249

Capital Stock

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Capital Stock

Restricted Stock Awards (“RSAs”) and Restricted Stock Units (“RSUs”)

The following table summarizes the weighted average valuation assumptions used to calculate the fair value of total shareholder return performance-based RSUs granted:


	For the Year Ended
	December 31, 2023			December 31, 2022			December 25, 2021
Share price	$	91.28		$	96.36		$	101.45
Expected dividend yield	0.0		%	0.0		%	0.0		%
Expected stock price volatility	32.8		%	38.3		%	38.9		%
Risk-free interest rate	4.6		%	1.6		%	0.2		%
Expected life	2.8 years			2.8 years			2.8 years

The following table summarizes our RSA and RSU activity for the three years ended December 31, 2023:


	Shares	Weighted Average Fair Value
Balance at December 26, 2020	217,735	$	72.77
Granted	81,694	$	106.23
Vested	(45,970)	$	70.62
Canceled	(46,782)	$	74.85
Balance at December 25, 2021	206,677	$	85.97
Granted	130,131	$	96.32
Vested	(55,255)	$	83.70
Canceled	(42,631)	$	85.89
Balance at December 31, 2022	238,922	$	92.07
Granted	112,893	$	95.34
Vested	(73,169)	$	80.63
Canceled	(21,092)	$	85.00
Balance at December 31, 2023	257,554	$	97.33

Stock Options

and was included in selling, general and administrative expense in the Consolidated Statements of Operations. No cost was capitalized during fiscal 2023, fiscal 2022 or fiscal 2021.

The following table summarizes the weighted average valuation assumptions used to calculate the fair value of options granted and the associated weighted-average grant-date fair values:


	For the Year Ended
	December 31, 2023			December 31, 2022			December 25, 2021
Expected dividend yield	0		%	0		%	0		%
Expected stock price volatility	35		%	34		%	34		%
Risk-free interest rate	4.3		%	1.8		%	0.7		%
Expected life of options	5.3 years			5.3 years			5.3 years
Weighted-average grant-date fair value	$	35.93		$	32.55		$	31.68

The following table summarizes our stock option activity for the three years ended December 31, 2023:


	Shares	Option Price per Share	Weighted Average Price		Weighted Average Remaining Terms (years)	Aggregate Intrinsic Value (in thousands)
Balance at December 26, 2020	250,779	$41.59– $84.93	$	70.21
Granted	59,578	$95.98 – $103.61	$	101.36
Exercised	(67,504)	$41.59 – $82.94	$	70.04
Canceled	(9,457)	$61.68 – $101.45	$	79.02
Balance at December 25, 2021	233,396	$61.68 –$103.61	$	77.85
Granted	79,749	$83.81 – $111.53	$	96.96
Exercised	(32,201)	$61.68 – $83.06	$	71.74
Expired	(663)	$101.45	$	101.45
Canceled	(12,162)	$61.68– $101.45	$	82.19
Balance at December 31, 2022	268,119	$61.68– $111.53	$	84.03
Granted	79,404	$86.63 – $91.28	$	91.13
Exercised	(24,297)	$$61.68 – $82.94	$	72.33
Expired	(7,488)	$81.91 – $101.45	$	91.24
Canceled	(4,521)	$82.94 – $101.45	$	88.52
Balance at December 31, 2023	311,217	$61.68 – $111.53	$	86.52	5.4	$	1,697
Exercisable at	134,348	$61.68 – $111.53	$	80.35	4.4	$	1,243


	For the Year Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Shares repurchased and canceled	13,778		23,015		11,452
Total cost of shares repurchased and canceled (in thousands)	$	1,160	$	2,357	$	1,172
Average price per share	$	84.22	$	102.40	$	102.38

At December 31, 2023, the 401(k) Plan held 147,123 shares of our common stock.

The following table summarizes the repurchase and cancellation of common stock:


	For the Years Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Shares repurchased and canceled	201,632		180,750		605,628
Total cost of shares repurchased and canceled (in thousands)	$	15,333	$	17,577	$	61,583
Average price per share	$	76.05	$	97.24	$	101.68

Earnings Per Share

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Earnings Per Share

earnings per share for fiscal 2023, fiscal 2022 and fiscal 2021, respectively, as their effect would have been anti-dilutive.

The following table sets forth the computation of basic earnings per share and diluted earnings per share:


	For the Year Ended
(in thousands, except per share data)	December 31, 2023		December 31, 2022		December 25, 2021
Numerator:
Net income	$	129,259	$	121,549	$	131,532
Denominator:
Weighted average basic shares outstanding	31,455		31,434		31,810
Effect of compensation awards	78		109		151
Weighted average diluted shares outstanding	31,533		31,543		31,961
Earnings Per Share:
Basic	$	4.11	$	3.87	$	4.13
Diluted	$	4.10	$	3.85	$	4.12

Schedule II: Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2023

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule II: Valuation and Qualifying Accounts

SCHEDULE II: Valuation and Qualifying Accounts


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Allowance for doubtful accounts:
Balance, beginning of period	$	1,363	$	1,326	$	1,260
Provision	4,592		56		177
Charge-offs	(2,437)		(19)		(111)

Balance, end of period	$	3,518	$	1,363	$	1,326
Allowance for customer credits:
Balance, beginning of period	$	192,116	$	188,080	$	155,751
Provision	407,328		373,157		334,615
Charge-offs	(394,949)		(369,121)		(302,286)
Balance, end of period	$	204,495	$	192,116	$	188,080

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Pay vs Performance Disclosure
Net income	$ 129,259	$ 121,549	$ 131,532

Insider Trading Arrangements	3 Months Ended
Insider Trading Arrangements	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of Significant Accounting Policies (Policies)	12 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2023
Accounting Policies [Abstract]
Principles of Consolidation	Principles of Consolidation. The Consolidated Financial Statements include our accounts and the accounts of our wholly owned subsidiaries. All material intercompany accounts and transactions have been eliminated in consolidation.
Use of Estimates in the Preparation of Financial Statements	Use of Estimates in the Preparation of Financial Statements. The preparation of financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Cash and Cash Equivalents	Cash and Cash Equivalents. We consider all highly liquid short-term investments with original maturities of three months or less to be cash equivalents.
Sales of Accounts Receivable	Sales of Accounts Receivable. We have entered into several customer-sponsored programs administered by unrelated financial institutions that permit us to sell certain accounts receivable at discounted rates to the financial institutions. Transactions under these programs were accounted for as sales of accounts receivable and were removed from our Consolidated Balance Sheet at the time of the sales transactions.
Inventories	Inventories. Inventories are stated at the lower of cost or net realizable value. Cost is determined by the first-in, first-out method. Inventories include the cost of material, freight, direct labor and overhead utilized in the processing of our products. We provide reserves for discontinued and excess inventory based upon historical demand, forecasted usage, estimated customer requirements and product line updates.
Property, Plant and Equipment	Property, Plant and Equipment. Property, plant and equipment are recorded at cost and depreciated over the estimated useful lives, which range from 1 to 39 years, using the straight-line method for financial statement reporting purposes and accelerated methods for income tax purposes. The costs of maintenance and repairs are expensed as incurred. Renewals and betterments are capitalized. Gains and losses on disposals are included in operating results.
Long-Lived Assets Including Goodwill and Other Acquired Intangible Assets	Long-Lived Assets Including Goodwill and Other Acquired Intangible Assets. Long-lived assets, including property, plant, and equipment and amortizable identifiable intangibles, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset or asset group may not be recoverable. The impairment review is a two-step process. First, recoverability is measured by comparing the carrying amount of an asset to the estimated undiscounted future cash flows expected to be generated by the asset. If the carrying amount exceeds the estimated undiscounted future cash flows, the second step of the impairment test is performed, and an impairment charge is recognized in the amount by which the carrying amount of the asset exceeds its fair value. The assets and liabilities of a disposal group classified as held for sale would be separately presented in the balance sheet and reported at the lower of the carrying amount or fair value less costs to sell, and would no longer be depreciated. Goodwill is reviewed for impairment on an annual basis or whenever events or changes in circumstances indicate the carrying value of the goodwill may be impaired. For the annual test, we have the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of a reporting unit is less than its carrying amount (“Step 0”). If through the Step 0 test we determine it is more likely than not that the fair value of a reporting unit is less than its carrying amount or if the Company elects to not perform Step 0), then we would perform a quantitative test (“Step 1”) to determine whether an impairment charge was necessary. During fiscal 2023, we elected to perform a Step 1 test of our goodwill for the dual purpose of assessing goodwill for impairment and reallocating goodwill to reporting units, using a representative fair value allocation, as part of reorganizing our reporting structure. See Note 8, "Segment Information" for additional information on the reorganization of our reporting structure. During fiscal 2022, we assessed the qualitative factors which could affect the fair values of our reporting units. For both fiscal 2023 and fiscal 2022, we determined that it was not more likely than not that the fair value of our reporting units were less than their carrying amounts.
Purchase Accounting	Purchase Accounting. The purchase price of an acquired business is allocated to the underlying tangible and intangible assets acquired and liabilities assumed based upon their respective fair market values, with the excess recorded as goodwill. Such fair market value assessments require judgments and estimates which may change over time and may cause the final amounts to differ materially from their original estimates. These adjustments to fair value assessments are recorded to goodwill over the purchase price allocation period which cannot exceed 12 months from the date of acquisition.
Other Assets	Other Assets. Other assets include primarily long-term core inventory, deposits, and equity method investments. Certain products we sell contain parts that can be recycled, or as more commonly referred to in our industry, remanufactured. We refer to these parts as cores. A used core is remanufactured and sold to the customer as a replacement for a unit inside a vehicle. Customers and end-users that purchase remanufactured products will generally return the used core to us, which we then use in the remanufacturing process to make another finished good. Our core inventory consists of used cores purchased and held in our facilities, used cores that are in the process of being returned from our customers and end-users, and remanufactured cores held in finished goods inventory at our facilities. Our products that utilize a core primarily include instrument clusters, hybrid batteries, radios, and climate control modules. Long-term core inventory was $20.0 million and $19.8 million as of December 31, 2023 and December 31, 2022, respectively. Long-term core inventory is recorded at the lower of cost or net realizable value. Cost is determined based on actual purchases of core inventory. We believe that the most appropriate classification of core inventory is a long-term asset. According to guidance provided under the Financial Accounting Standards Board ("FASB") Accounting Standards Codification, current assets are defined as “assets or resources commonly identified as those which are reasonably expected to be realized in cash or sold or consumed during the normal operating cycle of the business.” The determination of the long-term classification is based on our view that the value of the cores is not expected to be consumed or realized in cash during our normal annual operating cycle. We have investments that we account for according to the equity method of accounting. The total book value of these investments was $10.8 million and $9.4 million at December 31, 2023 and December 31, 2022, respectively. These investments provided $5.7 million, $5.5 million and $4.6 million of income during fiscal 2023, fiscal 2022, and fiscal 2021, respectively, and were included in the Light Duty segment income from operations. Additionally, we have an investment that we account for according to the cost method of accounting.
Other Accrued Liabilities	Other Accrued Liabilities. Other accrued liabilities include primarily accrued commissions, accrued income taxes, insurance liabilities, and other current liabilities.
Revenue Recognition and Accrued Customer Rebates and Returns	Revenue Recognition and Accrued Customer Rebates and Returns. Revenue is recognized from product sales when goods are shipped, title and risk of loss and control have been transferred to the customer and collection is reasonably assured. We record estimates for cash discounts, defective and slow-moving product returns, promotional rebates, core return deposits, and other discounts in the period of the sale ("Customer Credits"). The provision for Customer Credits is recorded as a reduction from gross sales and reserves for Customer Credits are shown as an increase of accrued customer rebates and returns, which is included in current liabilities. Customer Credits are estimated based on contractual provisions, historical experience, and our assessment of current market conditions. Actual Customer Credits have not differed materially from estimated amounts. Amounts billed to customers for shipping and handling are included in net sales. Costs associated with shipping and handling are included in cost of goods sold. As noted above, Customer Credits include core return deposits which are an estimate of the amount we believe we will refund to our customers when used cores are returned to us. The price we invoice to customers for remanufactured cores contains both the amount we charge to remanufacture the part and a deposit for the core. We charge a core deposit to encourage the customer to return the used core to us so that it can be used in our remanufacturing process. We allow our customers up to twenty-four months to return the used core to us. Core return deposits are reserved based on the expected deposits to be issued to customers based on historical returns.
Research and Development	Research and Development. Research and development costs are expensed as incurred.
Stock-Based Compensation	Stock-Based Compensation. At December 31, 2023, we had awards outstanding under a stock-based employee compensation plan, which is described more fully in Note 13, "Capital Stock." We record compensation expense for all awards granted. The value of restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) issued was based on the fair value of our common stock on the grant date. The fair value of performance-based RSUs, for which the performance measure is total shareholder return, is determined using a Monte Carlo simulation model. The fair value of stock options granted is determined using the Black-Scholes option valuation model on the grant date.
Income Taxes	Income Taxes. We follow the asset and liability method of accounting for deferred income taxes. Deferred tax assets and liabilities are determined based on the difference between the financial statement and tax bases of assets and liabilities. Deferred tax assets or liabilities at the end of each period are determined using the enacted tax rate expected to be in effect when taxes are paid or recovered. Unrecognized income tax benefits represent income tax positions taken on income tax returns that have not been recognized in the consolidated financial statements. The Company recognizes the benefit of an income tax position only if it is more likely than not (greater than 50%) that the tax position will be sustained upon tax examination, based solely on the technical merits of the tax position. Otherwise, no benefit is recognized. The tax benefits recognized are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. Additionally, we accrue interest and related penalties, if applicable, on all tax exposures for which reserves have been established consistent with jurisdictional tax laws. Interest and penalties are classified as income tax expense in the Consolidated Statements of Operations.
Concentrations of Risk	Concentrations of Risk. Financial instruments that potentially subject us to concentrations of credit risk consist primarily of cash equivalents and accounts receivable. All cash equivalents are managed within established guidelines that limit the amount that may be invested with one issuer. A significant percentage of our accounts receivable have been, and will continue to be, concentrated among a relatively small number of automotive retailers and warehouse distributors in the United States. Our 4 largest customers accounted for 74% and 69% of net accounts receivable as of December 31, 2023 and December 31, 2022, respectively. We continually monitor the credit terms and credit limits for these and other customers. In fiscal 2023 and fiscal 2022, approximately 70% and 64%, respectively, of our products were purchased from suppliers in a variety of non-U.S. countries, with the largest portion of our overseas purchases being made in China.
Fair Value Disclosures	Fair Value Disclosures. The carrying value of financial instruments such as cash and cash equivalents, accounts receivable, accounts payable, and other current assets and liabilities approximate their fair value based on the short-term nature of these instruments. The carrying value of our long-term debt approximates its fair value because it bears interest at a rate indexed to a market rate (Term SOFR). Additionally, the fair value of assets acquired and liabilities assumed are determined at the date of acquisition. Contingent consideration associated with an acquisition is recorded at fair value at the acquisition date and is adjusted to fair value at each reporting period.
Recent Accounting Pronouncements	Recent Accounting Pronouncements. In November 2023, the FASB issued Accounting Standards Update (“ASU”) 2023-07, Improvements to Reportable Segment Disclosures. The ASU requires additional disclosures about reportable segments’ significant expenses on an interim and annual basis. The ASU is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024 on a retrospective basis. In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures. The ASU expands disclosures in the income tax rate reconciliations table and cash taxes paid and is effective for annual periods beginning after December 15, 2024. We expect to implement these new standards by their effective dates, and do not expect their adoption to have an impact on our results of operations, financial condition or cash flows.

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Sales of Accounts Receivable

Sales of accounts receivable under these agreements, and related factoring costs, which were including in selling, general and administrative expenses, were as follows:


(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Sales of accounts receivable	$	949,517	$	1,048,671	$	935,770
Factoring costs	$	50,231	$	37,188	$	11,704

Estimated Useful Lives by Major Asset

Estimated useful lives by major asset category are as follows:


Buildings and building improvements			10 to 39 years
Machinery, equipment and tooling			3 to 10 years
Software and computer equipment			3 to 10 years
Furniture, fixtures and leasehold improvements			1 to 39 years

Property, plant and equipment include the following:


(in thousands)	December 31, 2023		December 31, 2022
Buildings	$	62,434	$	59,980
Machinery, equipment and tooling	208,086		184,184
Furniture, fixtures and leasehold improvements	17,083		12,225
Software and computer equipment	113,148		100,814
Total	400,751		357,203
Less-accumulated depreciation and amortization	(240,638)		(208,726)
Property, plant and equipment, net	$	160,113	$	148,477

Business Acquisitions and Investments (Tables)

12 Months Ended

Dec. 31, 2023

Business Combination and Asset Acquisition [Abstract]

Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed

The table below details the fair values of the assets acquired and the liabilities assumed at the acquisition date:


(in thousands)
Accounts receivable	$	3,317
Inventories	90,428
Prepaids and other current assets	5,293
Property, plant and equipment	23,776
Goodwill	247,474
Identifiable intangible assets	157,500
Operating lease right-of-use assets	11,661
Other Assets	3,001
Accounts payable	(7,436)
Accrued compensation	(2,086)
Accrued customer rebates and returns	(1,609)
Other current liabilities	(8,726)
Long-term operating lease liabilities	(9,508)
Other long-term liabilities	(3,307)
Net cash consideration	509,778

The table below details the fair values of the assets acquired and the liabilities assumed at the acquisition date, including applicable measurement period adjustments:


(in thousands)
Accounts receivable	$	23,216
Inventories	79,625
Prepaids and other current assets	2,302
Property, plant and equipment	29,900
Goodwill	106,816
Identifiable intangible assets	160,400
Operating lease right-of-use assets	21,248
Other assets	848
Accounts payable	(11,970)
Accrued compensation	(2,784)
Other current liabilities	(7,604)
Long-term operating lease liabilities	(18,444)
Deferred tax liabilities	(38,665)
Net cash consideration	$	344,888

Schedule of Valuation of Intangible Assets Acquired and Related Amortization Periods

The valuation of the intangible assets acquired, and related amortization periods are as follows:


(in thousands)	Fair Value		Amortization Period (in years)
Product portfolio	82,500		15
Trade names	48,400		20
Customer relationships	26,600		15
Total	$	157,500

The estimated valuation of the intangible assets acquired, and related amortization periods are as follows:


(in thousands)	Fair Value		Amortization Period (in years)
Customer relationships	$	124,100	20
Product portfolio	25,300		20
Trade names	11,000		10
Total	$	160,400

Summary of Unaudited Proforma Information


	For the Year Ended
(in thousands, except per share data, unaudited)	December 31, 2022		December 25, 2021
Net sales	$	1,888,379	$	1,556,360
Net income	$	130,375	$	143,419
Diluted earnings per share	$	4.13	$	4.49


	For the Year Ended
(in thousands, except per share data, unaudited)	December 25, 2021
Net sales	$	1,468,415
Net income	$	147,090
Diluted earnings per share	$	4.60

Inventories (Tables)

12 Months Ended

Dec. 31, 2023

Inventory Disclosure [Abstract]

Inventories

Inventories were as follows:


(in thousands)	December 31, 2023		December 31, 2022
Raw materials	$	29,750	$	34,267
Bulk product	211,805		234,871
Finished product	387,668		478,032
Packaging materials	8,152		8,731
Total	$	637,375	$	755,901

Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of Property, Plant and Equipment

Estimated useful lives by major asset category are as follows:


Buildings and building improvements			10 to 39 years
Machinery, equipment and tooling			3 to 10 years
Software and computer equipment			3 to 10 years
Furniture, fixtures and leasehold improvements			1 to 39 years

Property, plant and equipment include the following:


(in thousands)	December 31, 2023		December 31, 2022
Buildings	$	62,434	$	59,980
Machinery, equipment and tooling	208,086		184,184
Furniture, fixtures and leasehold improvements	17,083		12,225
Software and computer equipment	113,148		100,814
Total	400,751		357,203
Less-accumulated depreciation and amortization	(240,638)		(208,726)
Property, plant and equipment, net	$	160,113	$	148,477

Leases (Tables)

12 Months Ended

Dec. 31, 2023

Leases [Abstract]

Summary of Lease Expense

The following table summarizes the lease expense:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Operating lease expense	$	21,747	$	17,340	$	9,549
Short-term lease expense	7,169		5,838		3,172
Total lease expense	$	28,916	$	23,178	$	12,721

Summary of Supplemental Balance Sheet Information Related to Operating Leases

Supplemental balance sheet information related to our operating leases is as follows:


(in thousands)	December 31, 2023			December 31, 2022
Operating lease right-of-use assets	$	103,476		$	109,977

Other accrued liabilities	$	16,917		$	15,912
Long-term operating lease liabilities	91,262			98,221
Total operating lease liabilities	$	108,179		$	114,133

Weighted average remaining lease term (years)	6.85			7.76
Weighted average discount rate	4.20		%	3.91		%

Summary of Maturities of Operating Lease Liabilities

The following table summarizes the maturities of our lease liabilities for all operating leases as of December 31, 2023:


(in thousands)	December 31, 2023
2024	$	21,061
2025	19,785
2026	19,659
2027	17,802
2028	11,705
Thereafter	34,003
Total lease payments	124,015
Less: Imputed interest	(15,836)
Present value of lease liabilities	$	108,179

Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Goodwill included the following:


(in thousands)	Light Duty		Heavy Duty		Specialty Vehicle		Consolidated
Balance at December 25, 2021	$	—	$	—	$	—	$	197,332
Goodwill acquired	—		—		—		247,247
Foreign currency translation	—		—		—		(1,544)
Balance at December 31, 2022	—		—		—		443,035
Measurement period adjustments	—		—		—		233
Reporting structure reorganization (see Note 8)	313,704		56,637		72,309		—
Foreign currency translation	—		—		—		621
Balance at December 31, 2023	$	313,704	$	56,637	$	72,309	$	443,889

Schedule of Intangible Assets

Intangible assets, subject to amortization, included the following:


		December 31, 2023						December 31, 2022
Intangible assets subject to amortization	Weighted Average Amortization Period (years)	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
(dollars in thousands)
Customer relationships	16.2	$	175,430	$	31,678	$	143,752	$	175,430	$	21,643	$	153,787
Trade names	14.9	67,690		10,676		57,014		67,690		6,370		61,320
Product Portfolio	14.6	107,800		9,720		98,080		107,800		2,953		104,847
Technology	4.7	2,167		1,069		1,098		2,167		820		1,347
Patents and Other	6.6	2,230		618		1,612		1,430		322		1,108
Total		$	355,317	$	53,761	$	301,556	$	354,517	$	32,108	$	322,409

Schedule of Estimated Future Amortization Expense

The estimated future amortization expense for intangible assets as of December 31, 2023, is summarized as follows:


(in thousands)
2024	$	22,131
2025	21,998
2026	20,867
2027	20,178
2028	20,004
Thereafter	196,378
Total	$	301,556

Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2023

Debt Disclosure [Abstract]

Summary of Mandatory Repayment Provisions


Fiscal Quarter Ending			Principal Amortization Payment Percentage
December 31, 2022 through September 24, 2024			0.625
December 31, 2024 through September 30, 2025			1.25
December 31, 2025 through September 30, 2027			1.875

Segment Information (Tables)

12 Months Ended

Dec. 31, 2023

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

Segment results are as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Net Sales:
Light Duty	$	1,462,474	$	1,425,892	$	1,247,465
Heavy Duty	256,913		258,215		97,784
Specialty Vehicle	210,401		49,642		—
Total	$	1,929,788	$	1,733,749	$	1,345,249

Income from operations:
Light Duty	187,159		169,579		182,020
Heavy Duty	14,505		29,738		10,942
Specialty Vehicle	31,618		8,537		—
Total	$	233,282	$	207,854	$	192,962

Depreciation:
Light Duty	$	25,239	$	25,062	$	25,296
Heavy Duty	3,239		2,772		1,034
Specialty Vehicle	3,420		798		—
Total	$	31,898	$	28,632	$	26,330

Capital Expenditures:
Light Duty	$	33,445	$	31,682	$	19,016
Heavy Duty	3,581		4,769		824
Specialty Vehicle	6,942		1,432		—
Total	$	43,968	$	37,883	$	19,840

Segment Assets:
Light Duty	$	1,083,347	$	1,047,987	$	988,371
Heavy Duty	162,583		177,557		131,245
Specialty Vehicle	78,424		106,219		—
Total	$	1,324,354	$	1,331,763	$	1,119,616

Reconciliation of Operating Income from Segments to Consolidated

A reconciliation of segment adjusted operating income to consolidated income before taxes is as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Segment income from operations	$	233,282	$	207,854	$	192,962
Acquisition-related intangible assets amortization	(21,817)		(14,070)		(6,340)
Acquisition-related transaction and other costs	(15,373)		(22,736)		(15,071)
Fair value adjustment to contingent consideration	20,469		—		—
Executive transition services expenses	(1,801)		—		—
Interest expense, net	(48,061)		(15,582)		(2,162)
Other income, net	1,804		735		377
Consolidated income before income taxes	$	168,503	$	156,201	$	169,766

Reconciliation of Assets from Segment to Consolidated

A reconciliation of segment assets to consolidated assets is as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Segment assets	$	1,324,354	$	1,331,763	$	1,119,616
Other current assets	69,468		85,834		71,830
Other non-current assets	898,585		924,189		481,673
Consolidated assets	$	2,292,407	$	2,341,786	$	1,673,119

Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Components of Income Tax Provision (Benefit)

The components of the income tax provision (benefit) are as follows:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Current:
Federal	$	34,600	$	31,683	$	43,374
State	5,602		7,141		5,755
Foreign	2,002		1,708		1,075
	42,204		40,532		50,204
Deferred:
Federal	(1,936)		(4,003)		(9,609)
State	(338)		(1,022)		(1,368)
Foreign	(686)		(855)		(993)
	(2,960)		(5,880)		(11,970)
Total	$	39,244	$	34,652	$	38,234

Reconciliation of Income Taxes at Statutory Tax Rate to Company's Effective Tax Rate

The following is a reconciliation of income taxes at the statutory tax rate to the Company's effective tax rate:


	For the Year Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Federal taxes at statutory rate	21.0	%	21.0	%	21.0	%
State taxes, net of federal tax benefit	2.6		2.7		2.1
Research and development tax credit	(0.7)		(0.7)		(0.4)
Federal permanent items	0.3		(0.2)		—
Effect of foreign operations	0.3		—		(0.2)
Other	(0.2)		(0.6)		—
Effective tax rate	23.3	%	22.2	%	22.5	%

Change in Unrecognized Tax Benefits

The following table summarizes the change in unrecognized tax benefits for the three years ended December 31, 2023:


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Balance at beginning of year	$	3,856	$	1,204	$	1,060
Reductions due to lapses in statutes of limitations	(716)		(139)		—
Reductions due to tax positions settled	—		—		—
Additions related to positions taken during a prior period	—		2,136		—
Reductions due to reversals of prior year positions	—		—		(30)
Additions based on tax positions taken during the current period	1,399		655		174
Balance at end of year	4,539		3,856		1,204

Reconciliation of Deferred Tax Assets and Liabilities

Deferred income taxes result from timing differences in the recognition of revenue and expense between tax and financial statement purposes. The sources of temporary differences are as follows:


(in thousands)	December 31, 2023		December 31, 2022
Assets:
Inventories	$	17,829	$	13,662
Accounts receivable	20,472		20,446
Operating lease liability	26,261		24,904
Accrued expenses	19,265		12,526
Net operating losses	289		1,285
Foreign tax credits	469		469
State tax credits	379		403
Capital loss carryforward	478		481
Total deferred tax assets	85,442		74,176
Valuation allowance	(1,354)		(1,377)
Net deferred tax assets	84,088		72,799
Liabilities:
Depreciation	16,481		18,132
Goodwill and intangible assets	49,798		41,693
Operating lease right of use asset	25,142		23,924
Other	1,592		876
Gross deferred tax liabilities	93,013		84,625
Net deferred tax (liabilities) assets	$	(8,925)	$	(11,826)

Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2023

Revenue from Contract with Customer [Abstract]

Summary of Disaggregated Net Sales


	For the Year Ended
(in thousands)	December 31, 2023		December 31, 2022		December 25, 2021
Net Sales to U.S. Customers	$	1,772,092	$	1,606,472	$	1,269,050
Net Sales to Non-U.S. Customers	157,696		127,277		76,199
Net Sales	$	1,929,788	$	1,733,749	$	1,345,249

Capital Stock (Tables)

12 Months Ended

Dec. 31, 2023

Equity [Abstract]

Schedule of Weighted Average Valuation Assumptions Used to Calculate Fair Value Granted

The following table summarizes the weighted average valuation assumptions used to calculate the fair value of total shareholder return performance-based RSUs granted:


	For the Year Ended
	December 31, 2023			December 31, 2022			December 25, 2021
Share price	$	91.28		$	96.36		$	101.45
Expected dividend yield	0.0		%	0.0		%	0.0		%
Expected stock price volatility	32.8		%	38.3		%	38.9		%
Risk-free interest rate	4.6		%	1.6		%	0.2		%
Expected life	2.8 years			2.8 years			2.8 years

The following table summarizes the weighted average valuation assumptions used to calculate the fair value of options granted and the associated weighted-average grant-date fair values:


	For the Year Ended
	December 31, 2023			December 31, 2022			December 25, 2021
Expected dividend yield	0		%	0		%	0		%
Expected stock price volatility	35		%	34		%	34		%
Risk-free interest rate	4.3		%	1.8		%	0.7		%
Expected life of options	5.3 years			5.3 years			5.3 years
Weighted-average grant-date fair value	$	35.93		$	32.55		$	31.68

Summary of Restricted Stock Awards and Restricted Stock Unit Activity

The following table summarizes our RSA and RSU activity for the three years ended December 31, 2023:


	Shares	Weighted Average Fair Value
Balance at December 26, 2020	217,735	$	72.77
Granted	81,694	$	106.23
Vested	(45,970)	$	70.62
Canceled	(46,782)	$	74.85
Balance at December 25, 2021	206,677	$	85.97
Granted	130,131	$	96.32
Vested	(55,255)	$	83.70
Canceled	(42,631)	$	85.89
Balance at December 31, 2022	238,922	$	92.07
Granted	112,893	$	95.34
Vested	(73,169)	$	80.63
Canceled	(21,092)	$	85.00
Balance at December 31, 2023	257,554	$	97.33

Summary of Stock Option Activity

The following table summarizes our stock option activity for the three years ended December 31, 2023:


	Shares	Option Price per Share	Weighted Average Price		Weighted Average Remaining Terms (years)	Aggregate Intrinsic Value (in thousands)
Balance at December 26, 2020	250,779	$41.59– $84.93	$	70.21
Granted	59,578	$95.98 – $103.61	$	101.36
Exercised	(67,504)	$41.59 – $82.94	$	70.04
Canceled	(9,457)	$61.68 – $101.45	$	79.02
Balance at December 25, 2021	233,396	$61.68 –$103.61	$	77.85
Granted	79,749	$83.81 – $111.53	$	96.96
Exercised	(32,201)	$61.68 – $83.06	$	71.74
Expired	(663)	$101.45	$	101.45
Canceled	(12,162)	$61.68– $101.45	$	82.19
Balance at December 31, 2022	268,119	$61.68– $111.53	$	84.03
Granted	79,404	$86.63 – $91.28	$	91.13
Exercised	(24,297)	$$61.68 – $82.94	$	72.33
Expired	(7,488)	$81.91 – $101.45	$	91.24
Canceled	(4,521)	$82.94 – $101.45	$	88.52
Balance at December 31, 2023	311,217	$61.68 – $111.53	$	86.52	5.4	$	1,697
Exercisable at	134,348	$61.68 – $111.53	$	80.35	4.4	$	1,243

Summary of Shares Repurchase and Cancellation

The following table summarizes the repurchase and cancellation of common stock:


	For the Year Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Shares repurchased and canceled	13,778		23,015		11,452
Total cost of shares repurchased and canceled (in thousands)	$	1,160	$	2,357	$	1,172
Average price per share	$	84.22	$	102.40	$	102.38

The following table summarizes the repurchase and cancellation of common stock:


	For the Years Ended
	December 31, 2023		December 31, 2022		December 25, 2021
Shares repurchased and canceled	201,632		180,750		605,628
Total cost of shares repurchased and canceled (in thousands)	$	15,333	$	17,577	$	61,583
Average price per share	$	76.05	$	97.24	$	101.68

Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2023

Earnings Per Share [Abstract]

Schedule of Computation of Basic Earnings per Share and Diluted Earnings per Share

The following table sets forth the computation of basic earnings per share and diluted earnings per share:


	For the Year Ended
(in thousands, except per share data)	December 31, 2023		December 31, 2022		December 25, 2021
Numerator:
Net income	$	129,259	$	121,549	$	131,532
Denominator:
Weighted average basic shares outstanding	31,455		31,434		31,810
Effect of compensation awards	78		109		151
Weighted average diluted shares outstanding	31,533		31,543		31,961
Earnings Per Share:
Basic	$	4.11	$	3.87	$	4.13
Diluted	$	4.10	$	3.85	$	4.12

Summary of Significant Accounting Policies - Sales of Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Accounting Policies [Abstract]
Sales of accounts receivable	$ 949,517	$ 1,048,671	$ 935,770
Factoring costs	$ 50,231	$ 37,188	$ 11,704

Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) Segment Customer	Dec. 31, 2022 USD ($) Customer	Dec. 25, 2021 USD ($)
Significant Accounting Policies [Line Items]
Number of operating segments \| Segment	3
Number of reportable operating segment \| Segment	3
Long-term core inventory	$ 20.0	$ 19.8
Total book value of equity method investments with fair value	10.8	9.4
Income from equity method investments	5.7	5.5	$ 4.6
Carrying book value of cost method investments	$ 5.0	$ 5.0
Return period	24 months
Credit Concentration Risk \| Net Accounts Receivable \| Four Customer
Significant Accounting Policies [Line Items]
Number of largest customers \| Customer	4	4
Concentration risk percentage	74.00%	69.00%
Supplier Concentration Risk \| Products \| Foreign Countries
Significant Accounting Policies [Line Items]
Concentration risk percentage	70.00%	64.00%
Selling, General and Administrative Expenses
Significant Accounting Policies [Line Items]
Research and development costs	$ 32.3	$ 24.8	$ 23.1
Minimum
Significant Accounting Policies [Line Items]
Estimated useful life	1 year
Maximum
Significant Accounting Policies [Line Items]
Estimated useful life	39 years

Summary of Significant Accounting Policies - Estimated Useful Lives by Major Asset (Details)	Dec. 31, 2023
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	1 year
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Buildings and building improvements \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Buildings and building improvements \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years
Machinery, equipment and tooling \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Machinery, equipment and tooling \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Software and computer equipment \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Software and computer equipment \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years
Furniture, fixtures and leasehold improvements \| Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	1 year
Furniture, fixtures and leasehold improvements \| Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	39 years

Business Acquisitions and Investments - Additional Information (Details) - USD ($) $ in Thousands			12 Months Ended
	Oct. 04, 2022	Aug. 10, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Business Acquisition [Line Items]
Business acquisition, purchase price			$ (67)	$ 488,956	$ 345,483
Business acquisition, measurement period adjustments, increase to goodwill			(233)
Super ATV, LLC
Business Acquisition [Line Items]
Business acquisition, percentage of outstanding stock acquired	100.00%
Business acquisition, purchase price	$ 509,800
Business acquisition, net of acquired cash	6,800
Potential earn-out	$ 100,000
Payments to acquire businesses			300
Goodwill, potential tax deductible amount			400,500
Business acquisition, net sales			49,600
Business acquisition, net income			$ 2,300
Dayton Parts
Business Acquisition [Line Items]
Business acquisition, percentage of outstanding stock acquired		100.00%
Business acquisition, purchase price		$ 344,900
Business acquisition, net of acquired cash		$ 8,800
Business acquisition, net sales				78,000
Business acquisition, net income				$ 0
Business acquisition, measurement period adjustments, increase to goodwill					2,100
Business acquisition, measurement period adjustments, decrease in purchase price due to customary net working capital					600
Business acquisition, measurement period adjustments, increase other current liabilities					100
Business acquisition, measurement period adjustments, decrease in deferred tax liabilities					$ 1,600

Business Acquisitions and Investments - Schedule of Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Oct. 04, 2022	Dec. 25, 2021	Aug. 10, 2021
Business Acquisition [Line Items]
Goodwill	$ 443,889	$ 443,035		$ 197,332
Super ATV, LLC
Business Acquisition [Line Items]
Accounts receivable			$ 3,317
Inventories			90,428
Prepaids and other current assets			5,293
Property, plant and equipment			23,776
Goodwill			247,474
Business acquisition, identified intangibles			157,500
Operating lease right-of-use assets			11,661
Other assets			3,001
Accounts payable			(7,436)
Accrued compensation			(2,086)
Accrued customer rebates and returns			(1,609)
Other current liabilities			(8,726)
Long-term operating lease liabilities			(9,508)
Other long-term liabilities			(3,307)
Net cash consideration			$ 509,778
Dayton Parts
Business Acquisition [Line Items]
Accounts receivable					$ 23,216
Inventories					79,625
Prepaids and other current assets					2,302
Property, plant and equipment					29,900
Goodwill					106,816
Business acquisition, identified intangibles					160,400
Operating lease right-of-use assets					21,248
Other assets					848
Accounts payable					(11,970)
Accrued compensation					(2,784)
Other current liabilities					(7,604)
Long-term operating lease liabilities					(18,444)
Deferred tax liabilities					(38,665)
Net cash consideration					$ 344,888

Business Acquisitions and Investments - Schedule of Valuation of Intangible Assets Acquired and Related Amortization Periods (Details) - USD ($) $ in Thousands	Oct. 04, 2022	Aug. 10, 2021
Super ATV, LLC
Business Acquisition [Line Items]
Fair Value	$ 157,500
Super ATV, LLC \| Product portfolio
Business Acquisition [Line Items]
Fair Value	$ 82,500
Amortization Period (in years)	15 years
Super ATV, LLC \| Trade names
Business Acquisition [Line Items]
Fair Value	$ 48,400
Amortization Period (in years)	20 years
Super ATV, LLC \| Customer relationships
Business Acquisition [Line Items]
Fair Value	$ 26,600
Amortization Period (in years)	15 years
Dayton Parts
Business Acquisition [Line Items]
Fair Value		$ 160,400
Dayton Parts \| Product portfolio
Business Acquisition [Line Items]
Fair Value		$ 25,300
Amortization Period (in years)		20 years
Dayton Parts \| Trade names
Business Acquisition [Line Items]
Fair Value		$ 11,000
Amortization Period (in years)		10 years
Dayton Parts \| Customer relationships
Business Acquisition [Line Items]
Fair Value		$ 124,100
Amortization Period (in years)		20 years

Business Acquisitions and Investments - Summary of Unaudited Proforma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Super ATV, LLC
Business Acquisition [Line Items]
Net sales	$ 1,888,379	$ 1,556,360
Net income	$ 130,375	$ 143,419
Diluted earnings (dollars per share)	$ 4.13	$ 4.49
Dayton Parts
Business Acquisition [Line Items]
Net sales		$ 1,468,415
Net income		$ 147,090
Diluted earnings (dollars per share)		$ 4.60

Inventories - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Raw materials	$ 29,750	$ 34,267
Bulk product	211,805	234,871
Finished product	387,668	478,032
Packaging materials	8,152	8,731
Total	$ 637,375	$ 755,901

Property, Plant and Equipment - Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Total	$ 400,751	$ 357,203
Less-accumulated depreciation and amortization	(240,638)	(208,726)
Property, plant and equipment, net	160,113	148,477
Buildings
Property, Plant and Equipment [Line Items]
Total	62,434	59,980
Machinery, equipment and tooling
Property, Plant and Equipment [Line Items]
Total	208,086	184,184
Furniture, fixtures and leasehold improvements
Property, Plant and Equipment [Line Items]
Total	17,083	12,225
Software and computer equipment
Property, Plant and Equipment [Line Items]
Total	$ 113,148	$ 100,814

Property, Plant and Equipment - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Property, Plant and Equipment [Abstract]
Depreciation and amortization expenses	$ 31.9	$ 28.6	$ 26.3

Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Lessee Lease Description [Line Items]
Cash paid for operating leases	$ 21.2	$ 16.8	$ 9.2
Minimum
Lessee Lease Description [Line Items]
Operating lease remaining lease term	1 year
Maximum
Lessee Lease Description [Line Items]
Operating lease remaining lease term	10 years

Leases - Summary of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Leases [Abstract]
Operating lease expense	$ 21,747	$ 17,340	$ 9,549
Short-term lease expense	7,169	5,838	3,172
Total lease expense	$ 28,916	$ 23,178	$ 12,721

Leases - Summary of Supplemental Balance Sheet Information Related to Operating Leases (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease right-of-use assets	$ 103,476	$ 109,977
Other accrued liabilities	16,917	15,912
Long-term operating lease liabilities	91,262	98,221
Total operating lease liabilities	$ 108,179	$ 114,133
Weighted average remaining lease term (years)	6 years 10 months 6 days	7 years 9 months 3 days
Weighted average discount rate	4.20%	3.91%
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Other accrued liabilities	Other accrued liabilities

Leases - Summary of Maturities of Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
2024	$ 21,061
2025	19,785
2026	19,659
2027	17,802
2028	11,705
Thereafter	34,003
Total lease payments	124,015
Less: Imputed interest	(15,836)
Total operating lease liabilities	$ 108,179	$ 114,133

Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Balance at beginning of period	$ 443,035	$ 197,332
Goodwill acquired		247,247
Measurement period adjustments	233
Reporting structure reorganization (see Note 8)	0
Foreign currency translation	621	(1,544)
Balance at end of period	443,889	443,035
Light Duty
Goodwill [Roll Forward]
Balance at beginning of period	0	0
Goodwill acquired		0
Measurement period adjustments	0
Reporting structure reorganization (see Note 8)	313,704
Foreign currency translation	0	0
Balance at end of period	313,704	0
Heavy Duty
Goodwill [Roll Forward]
Balance at beginning of period	0	0
Goodwill acquired		0
Measurement period adjustments	0
Reporting structure reorganization (see Note 8)	56,637
Foreign currency translation	0	0
Balance at end of period	56,637	0
Specialty Vehicle
Goodwill [Roll Forward]
Balance at beginning of period	0	0
Goodwill acquired		0
Measurement period adjustments	0
Reporting structure reorganization (see Note 8)	72,309
Foreign currency translation	0	0
Balance at end of period	$ 72,309	$ 0

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Finite Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 355,317	$ 354,517
Accumulated Amortization	53,761	32,108
Net Carrying Value	$ 301,556	322,409
Customer relationships
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	16 years 2 months 12 days
Gross Carrying Value	$ 175,430	175,430
Accumulated Amortization	31,678	21,643
Net Carrying Value	$ 143,752	153,787
Trade names
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	14 years 10 months 24 days
Gross Carrying Value	$ 67,690	67,690
Accumulated Amortization	10,676	6,370
Net Carrying Value	$ 57,014	61,320
Product portfolio
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	14 years 7 months 6 days
Gross Carrying Value	$ 107,800	107,800
Accumulated Amortization	9,720	2,953
Net Carrying Value	$ 98,080	104,847
Technology
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	4 years 8 months 12 days
Gross Carrying Value	$ 2,167	2,167
Accumulated Amortization	1,069	820
Net Carrying Value	$ 1,098	1,347
Patents and Other
Finite Lived Intangible Assets [Line Items]
Weighted Average Amortization Period (years)	6 years 7 months 6 days
Gross Carrying Value	$ 2,230	1,430
Accumulated Amortization	618	322
Net Carrying Value	$ 1,612	$ 1,108

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Acquisition-related intangible assets amortization	$ 22.1	$ 14.2	$ 6.5

Goodwill and Intangible Assets - Schedule of Estimated Future Amortization Expense (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
2024	$ 22,131
2025	21,998
2026	20,867
2027	20,178
2028	20,004
Thereafter	196,378
Net Carrying Value	$ 301,556	$ 322,409

Long-Term Debt - Additional Information (Details) - USD ($)			12 Months Ended
	Oct. 04, 2022	Aug. 10, 2021	Dec. 31, 2023
Previous Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 100,000,000
Dayton Parts \| New Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 600,000,000.0
Credit facility, expiration date		Aug. 10, 2026
Dayton Parts \| Letter of Credit
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 60,000,000
Super ATV, LLC \| Long-Term Debt
Debt Instrument [Line Items]
Term loan	$ 500,000,000
Super ATV, LLC \| Long-Term Debt \| Interest Rate Floor
Debt Instrument [Line Items]
Stated percentage	0.00%
Super ATV, LLC \| Secured Overnight Financing Rate (SOFR) \| Long-Term Debt
Debt Instrument [Line Items]
Credit facility, interest rate	1.50%
Super ATV, LLC \| Base Rate \| Long-Term Debt
Debt Instrument [Line Items]
Credit facility, interest rate	0.50%
Super ATV, LLC \| Maximum \| Secured Overnight Financing Rate (SOFR) \| Long-Term Debt
Debt Instrument [Line Items]
Credit facility, interest rate	2.00%
Super ATV, LLC \| Maximum \| Base Rate \| Long-Term Debt
Debt Instrument [Line Items]
Credit facility, interest rate	1.00%
Super ATV, LLC \| Minimum \| Secured Overnight Financing Rate (SOFR) \| Long-Term Debt
Debt Instrument [Line Items]
Credit facility, interest rate	1.00%
Super ATV, LLC \| Minimum \| Base Rate \| Long-Term Debt
Debt Instrument [Line Items]
Credit facility, interest rate	0.00%
Super ATV, LLC \| Revolving Credit Facility
Debt Instrument [Line Items]
Stated percentage			6.96%
Credit facility, commitment fee percentage	0.20%		0.15%
Super ATV, LLC \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Credit facility, commitment fee percentage	0.25%
Super ATV, LLC \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Credit facility, commitment fee percentage	0.125%

Long-Term Debt - Summary of Mandatory Repayment Provisions (Details) - Super ATV, LLC - Long-Term Debt	Dec. 31, 2023
December 31, 2022 through September 24, 2024
Debt Instrument [Line Items]
Principal Amortization Payment Percentage	0.625
December 31, 2024 through September 30, 2025
Debt Instrument [Line Items]
Principal Amortization Payment Percentage	1.25
December 31, 2025 through September 30, 2027
Debt Instrument [Line Items]
Principal Amortization Payment Percentage	1.875

Segment Information - Additional Information (Details)	12 Months Ended
Segment Information - Additional Information (Details)	Dec. 31, 2023 Segment
Segment Reporting [Abstract]
Number of reportable operating segment	3
Number of operating segments	3

Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Segment Reporting Information [Line Items]
Net sales	$ 1,929,788	$ 1,733,749	$ 1,345,249
Income from operations:	214,760	171,048	171,551
Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,929,788	1,733,749	1,345,249
Income from operations:	233,282	207,854	192,962
Depreciation:	31,898	28,632	26,330
Capital Expenditures:	43,968	37,883	19,840
Segment assets	1,324,354	1,331,763	1,119,616
Light Duty \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	1,462,474	1,425,892	1,247,465
Income from operations:	187,159	169,579	182,020
Depreciation:	25,239	25,062	25,296
Capital Expenditures:	33,445	31,682	19,016
Segment assets	1,083,347	1,047,987	988,371
Heavy Duty \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	256,913	258,215	97,784
Income from operations:	14,505	29,738	10,942
Depreciation:	3,239	2,772	1,034
Capital Expenditures:	3,581	4,769	824
Segment assets	162,583	177,557	131,245
Specialty Vehicle \| Operating Segments
Segment Reporting Information [Line Items]
Net sales	210,401	49,642	0
Income from operations:	31,618	8,537	0
Depreciation:	3,420	798	0
Capital Expenditures:	6,942	1,432	0
Segment assets	$ 78,424	$ 106,219	$ 0

Segment Information - Reconciliation of Operating Income from Segments to Consolidated (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Segment Reporting Information [Line Items]
Segment income from operations	$ 214,760	$ 171,048	$ 171,551
Acquisition-related intangible assets amortization	(22,100)	(14,200)	(6,500)
Interest expense, net	(48,061)	(15,582)	(2,162)
Other income, net	1,804	735	377
Income before income taxes	168,503	156,201	169,766
Operating Segments
Segment Reporting Information [Line Items]
Segment income from operations	233,282	207,854	192,962
Segment Reconciling Items
Segment Reporting Information [Line Items]
Acquisition-related intangible assets amortization	(21,817)	(14,070)	(6,340)
Acquisition-related transaction and other costs	(15,373)	(22,736)	(15,071)
Fair value adjustment to contingent consideration	20,469	0	0
Executive transition services expenses	(1,801)	0	0
Interest expense, net	(48,061)	(15,582)	(2,162)
Other income, net	$ 1,804	$ 735	$ 377

Segment Information - Reconciliation of Assets from Segment to Consolidated (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Segment Reporting Information [Line Items]
Other current assets	$ 1,233,709	$ 1,269,120
Total assets	2,292,407	2,341,786	$ 1,673,119
Operating Segments
Segment Reporting Information [Line Items]
Segment assets	1,324,354	1,331,763	1,119,616
Segment Reconciling Items
Segment Reporting Information [Line Items]
Other current assets	69,468	85,834	71,830
Other non-current assets	$ 898,585	$ 924,189	$ 481,673

Related Party Transactions (Details) $ in Millions	12 Months Ended
Related Party Transactions (Details) $ in Millions	Dec. 31, 2023 USD ($) Supplier	Dec. 31, 2022 USD ($)	Dec. 25, 2021 USD ($)
Related Party Transaction [Line Items]
Cash paid for operating leases	$ 21.2	$ 16.8	$ 9.2
Purchases from companies and from PTI prior to full acquisition	22.7	24.9	18.9
Executive Chairman And Certain Of His Family Members
Related Party Transaction [Line Items]
Cash paid for operating leases	2.9	2.5	$ 2.3
President And Chief Executive Officer
Related Party Transaction [Line Items]
Cash paid for operating leases	2.6	0.5
Immediate Family Member of Management or Principal Owner
Related Party Transaction [Line Items]
Cash paid for operating leases	$ 0.2	$ 0.1
Joint Venture
Related Party Transaction [Line Items]
Number of suppliers with company partners Joint Venture \| Supplier	1
Minority interests in number of suppliers \| Supplier	2

Income Taxes - Components of Income Tax Provision (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Current:
Federal	$ 34,600	$ 31,683	$ 43,374
State	5,602	7,141	5,755
Foreign	2,002	1,708	1,075
Current, Total	42,204	40,532	50,204
Deferred:
Federal	(1,936)	(4,003)	(9,609)
State	(338)	(1,022)	(1,368)
Foreign	(686)	(855)	(993)
Deferred, Total	(2,960)	(5,880)	(11,970)
Total	$ 39,244	$ 34,652	$ 38,234

Income Taxes - Reconciliation of Income Taxes at Statutory Tax Rate to Company's Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Federal taxes at statutory rate	21.00%	21.00%	21.00%
State taxes, net of federal tax benefit	2.60%	2.70%	2.10%
Research and development tax credit	(0.70%)	(0.70%)	(0.40%)
Federal permanent items	0.30%	(0.20%)	0.00%
Effect of foreign operations	0.30%	0.00%	(0.20%)
Other	(0.20%)	(0.60%)	0.00%
Effective tax rate	23.30%	22.20%	22.50%

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Income Tax Contingency [Line Items]
Net unrecognized tax benefits	$ 4,539	$ 3,856	$ 1,204	$ 1,060
Income from operations:	$ 214,760	$ 171,048	$ 171,551
Federal net operating loss expire period	2036
State net operating loss carryforwards expire period	2037
Federal
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 200
Income from operations:	100
State
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 100

Income Taxes - Change in Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 3,856	$ 1,204	$ 1,060
Reductions due to lapses in statutes of limitations	(716)	(139)	0
Reductions due to tax positions settled	0	0	0
Additions related to positions taken during a prior period	0	2,136	0
Reductions due to reversals of prior year positions	0	0	(30)
Additions based on tax positions taken during the current period	1,399	655	174
Balance at end of year	$ 4,539	$ 3,856	$ 1,204

Income Taxes - Reconciliation of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Assets:
Inventories	$ 17,829	$ 13,662
Accounts receivable	20,472	20,446
Operating lease liability	26,261	24,904
Accrued expenses	19,265	12,526
Net operating losses	289	1,285
Foreign tax credits	469	469
State tax credits	379	403
Capital loss carryforward	478	481
Total deferred tax assets	85,442	74,176
Valuation allowance	(1,354)	(1,377)
Net deferred tax assets	84,088	72,799
Liabilities:
Depreciation	16,481	18,132
Goodwill and intangible assets	49,798	41,693
Operating lease right of use asset	25,142	23,924
Other	1,592	876
Gross deferred tax liabilities	93,013	84,625
Net deferred tax liabilities	$ (8,925)	$ (11,826)

Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Commitments and Contingencies Disclosure [Abstract]
Maximum additional contingent payments to be made	$ 102,000
Fair value of estimated payments	0	$ 20,000
Net decrease in contingent consideration liability	20,000
Fair value adjustment to contingent consideration	20,468	0	$ 0
Increase due to accretion as a result of the passage of time	$ 500
Contingent consideration paid		$ 1,800

Revenue Recognition - Additional Information (Details) - Customer	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Revenue From Contract With Customer [Line Items]
Maximum credit terms allow to customers	1 year
Number of customers exceeding 10% of net sales	3	3	3
Sales Revenue, Net \| Customer Concentration Risk \| Three Customer
Revenue From Contract With Customer [Line Items]
Total percentage of sales to customers exceeding 10% of sales	44.00%	49.00%	54.00%
Maximum
Revenue From Contract With Customer [Line Items]
Customer purchase order duration of contract	1 year
Customer pays for good or service future duration	1 year
Expense costs to obtain as incurred, expected period of benefit, amortization period	1 year
Maximum \| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2024-01-01
Revenue From Contract With Customer [Line Items]
Revenue, remaining performance obligations for contract, initial term	1 year

Revenue Recognition - Summary of Disaggregated Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Disaggregation Of Revenue [Line Items]
Net Sales	$ 1,929,788	$ 1,733,749	$ 1,345,249
Net Sales to U.S. Customers
Disaggregation Of Revenue [Line Items]
Net Sales	1,772,092	1,606,472	1,269,050
Net Sales to Non-U.S. Customers
Disaggregation Of Revenue [Line Items]
Net Sales	$ 157,696	$ 127,277	$ 76,199

Capital Stock - Additional Information (Details) - USD ($)	1 Months Ended	12 Months Ended
	May 31, 2017	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of outstanding shares owned by controlling family		16.00%	16.00%
Shares authorized of undesignated capital stock for future issuance		50,000,000
Date of plan approval		May 16, 2018
Authorized number of common stock shares for grant		1,200,000
Maximum grant period from date of plan approval		10 years
Shares available for grant under the plan		442,462
Weighted-average grant-date fair value (dollars per share)		$ 91.13	$ 96.96	$ 101.36
Compensation cost related to stock options		$ 2,000,000	$ 1,700,000	$ 1,300,000
Cash received from stock option exercises under the plan		$ 1,167,000	1,046,000	2,455,000
Common stock, shares held by 401(K) plan		147,123
Total 401(K) expense		$ 9,100,000	$ 8,200,000	$ 6,300,000
Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share repurchase program shares authorized to be repurchased		$ 600,000,000
Shares available for repurchase under share repurchase program		212,700,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized number of common stock shares for grant	1,000,000
Rate of discount on shares of common stock available for sale to eligible employees	15.00%
Number of shares purchased		29,650	25,600	40,303
Compensation cost		$ 400,000	$ 400,000	$ 900,000
RSAs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life					3 years
Performance-based RSAs and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value (dollars per share)		$ 113.15	$ 111.31	$ 131.02
Performance-based and Time-based RSAs and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost related to restricted stock awards and restricted stock units		$ 9,100,000	$ 7,200,000	$ 6,100,000
RSAs and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to unvested stock options		$ 13,500,000
Unrecognized compensation cost related to unvested stock options, weighted-average period		2 years
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life		5 years 3 months 18 days	5 years 3 months 18 days	5 years 3 months 18 days
Weighted-average grant-date fair value (dollars per share)		$ 35.93	$ 32.55	$ 31.68
Unrecognized compensation cost related to unvested stock options		$ 4,000,000
Unrecognized compensation cost related to unvested stock options, weighted-average period		2 years 7 months 6 days

Capital Stock - Schedule of Weighted Average Valuation Assumptions - RSAs and RSUs (Details) - Performance Based RSAs and Performance-Based RSUs - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share price (dollars per share)	$ 91.28	$ 96.36	$ 101.45
Expected dividend yield	0.00%	0.00%	0.00%
Expected stock price volatility	32.80%	38.30%	38.90%
Risk-free interest rate	4.60%	1.60%	0.20%
Expected life	2 years 9 months 18 days	2 years 9 months 18 days	2 years 9 months 18 days

Capital Stock - Summary of RSA and RSU Activity (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Shares
Beginning balance (in shares)	238,922	206,677	217,735
Granted (in shares)	112,893	130,131	81,694
Vested (in shares)	(73,169)	(55,255)	(45,970)
Canceled (in shares)	(21,092)	(42,631)	(46,782)
Ending balance (in shares)	257,554	238,922	206,677
Weighted Average Fair Value
Beginning balance, weighted average fair value (dollars per share)	$ 92.07	$ 85.97	$ 72.77
Granted, weighted average fair value (dollars per share)	95.34	96.32	106.23
Vested, weighted average fair value (dollars per share)	80.63	83.70	70.62
Cancelled, weighted average fair value (dollars per share)	85.00	85.89	74.85
Ending balance, weighted average fair value (dollars per share)	$ 97.33	$ 92.07	$ 85.97

Capital Stock - Summary of Weighted Average Valuation Assumptions - Options Granted (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value (dollars per share)	$ 91.13	$ 96.96	$ 101.36
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected dividend yield	0.00%	0.00%	0.00%
Expected stock price volatility	35.00%	34.00%	34.00%
Risk-free interest rate	4.30%	1.80%	0.70%
Expected life	5 years 3 months 18 days	5 years 3 months 18 days	5 years 3 months 18 days
Weighted-average grant-date fair value (dollars per share)	$ 35.93	$ 32.55	$ 31.68

Capital Stock - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Shares
Beginning balance (in shares)	268,119	233,396	250,779
Granted (in shares)	79,404	79,749	59,578
Exercised (in shares)	(24,297)	(32,201)	(67,504)
Canceled (in shares)	(4,521)	(12,162)	(9,457)
Expired (in shares)	(7,488)	(663)
Ending balance (in shares)	311,217	268,119	233,396
Ending balance, exercisable (in shares)	134,348
Option Price per Share
Expired, option price per share (dollars per share)		$ 101.45
Weighted Average Price
Beginning balance, weighted average price (dollars per share)	$ 84.03	77.85	$ 70.21
Granted, weighted average price (dollars per share)	91.13	96.96	101.36
Exercised, weighted average price (dollars per share)	72.33	71.74	70.04
Cancelled, weighted average price (dollars per share)	88.52	82.19	79.02
Expired, weighted average price (dollars per share)	91.24	101.45
Ending balance, weighted average price (dollars per share)	86.52	84.03	77.85
Exercisable, weighted average price (dollars per share)	$ 80.35
Balance at December 31, 2023, weighted average remaining term (in years)	5 years 4 months 24 days
Exercisable, weighted average remaining term (in years)	4 years 4 months 24 days
Balance at December 31, 2023, aggregate intrinsic value	$ 1,697
Exercisable, aggregate intrinsic value	$ 1,243
Minimum
Option Price per Share
Beginning balance, option price per share (dollars per share)	$ 61.68	61.68	41.59
Granted, option price per share (dollars per share)	86.63	83.81	95.98
Exercised, option price per share (dollars per share)	61.68	61.68	41.59
Cancelled, option price per share (dollars per share)	82.94	61.68	61.68
Expired, option price per share (dollars per share)	81.91
Ending balance, option price per share (dollars per share)	61.68	61.68	61.68
Ending balance, Exercisable option price per share (dollars per share)	61.68
Maximum
Option Price per Share
Beginning balance, option price per share (dollars per share)	111.53	103.61	84.93
Granted, option price per share (dollars per share)	91.28	111.53	103.61
Exercised, option price per share (dollars per share)	82.94	83.06	82.94
Cancelled, option price per share (dollars per share)	101.45	101.45	101.45
Expired, option price per share (dollars per share)	101.45
Ending balance, option price per share (dollars per share)	111.53	$ 111.53	$ 103.61
Ending balance, Exercisable option price per share (dollars per share)	$ 111.53

Capital Stock - Summary of Shares Repurchase and Cancellation (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Common Stock Repurchases
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased and canceled (in shares)	13,778	23,015	11,452
Total cost of shares repurchased and canceled (in thousands)	$ 1,160	$ 2,357	$ 1,172
Average price per share (in dollars per share)	$ 84.22	$ 102.40	$ 102.38
Share Repurchase Program
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares repurchased and canceled (in shares)	201,632	180,750	605,628
Total cost of shares repurchased and canceled (in thousands)	$ 15,333	$ 17,577	$ 61,583
Average price per share (in dollars per share)	$ 76.05	$ 97.24	$ 101.68

Earnings Per Share - Additional Information (Details) - shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Earnings Per Share [Abstract]
Stock-based awards considered as anti-dilutive	297,500	63,500	14,250

Earnings Per Share - Schedule of Computation of Basic Earnings per Share and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Numerator:
Net income	$ 129,259	$ 121,549	$ 131,532
Denominator:
Weighted average basic shares outstanding (in shares)	31,455	31,434	31,810
Effect of compensation awards (in shares)	78	109	151
Weighted averaged diluted shares outstanding (in shares)	31,533	31,543	31,961
Earnings per share:
Basic (dollars per share)	$ 4.11	$ 3.87	$ 4.13
Diluted (dollars per share)	$ 4.10	$ 3.85	$ 4.12

Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 25, 2021
Allowance for doubtful accounts:
Valuation and Qualifying Accounts
Balance, beginning of period	$ 1,363	$ 1,326	$ 1,260
Provision	4,592	56	177
Charge-offs	(2,437)	(19)	(111)
Balance, end of period	3,518	1,363	1,326
Allowance for customer credits:
Valuation and Qualifying Accounts
Balance, beginning of period	192,116	188,080	155,751
Provision	407,328	373,157	334,615
Charge-offs	(394,949)	(369,121)	(302,286)
Balance, end of period	$ 204,495	$ 192,116	$ 188,080

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