BCC Boise Cascade LLC

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Fellow Shareholders:

You are cordially invited to join us for our 2025 Annual Meeting of Shareholders, which will be held on Thursday, May 1, 2025, at 9:30 a.m. Mountain Daylight Time via live webcast. You will be able to attend the Annual Meeting online where you can vote your shares electronically, and submit questions by visiting
www.virtualshareholdermeeting.com/BCC2025. The Notice of Annual Meeting of Shareholders and the Proxy Statement that follow describe the business to be conducted at the meeting.

As we look forward to our 2025 Annual Meeting of Shareholders, it is worth reflecting on the year just completed.

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In 2024, we executed on our succession plan and experienced several leadership changes, including the promotion of one officer as the new executive officer of our Wood Products segment, and the election of two new officers, one who leads our newly created investor relations department and one who leads our human resources department.

In early 2025, we elected a chief operating officer to oversee our Wood Products and Building Materials

Distribution (BMD) segments. Additionally, in 2024, we refreshed the chairs of the Audit Committee and the Corporate Governance and Nominating Committee, as well as our lead independent director. Upon their reelection to the Board, the Directors elected to those roles in 2024 will remain in place to gain further leadership experience as we look to further refresh our Board in 2026 in accordance with our Director retirement policy.

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The Board’s role is critical in overseeing our corporate strategy and operations, and we continue to work closely with the management team on matters regarding the business and its performance. Throughout the year, the Board meeting agendas regularly included significant business and organizational initiatives, capital allocation strategies, and business development opportunities to increase both our earnings and earnings stability by growing our market position in EWP and expanding our distribution capabilities. These

discussions allowed the Board to review how the management team leveraged our integrated business model and superior access to the market for our Wood Products segment through our BMD segment, drove operational excellence by improving veneer self-sufficiency and using data-driven process improvement programs and highly efficient logistics systems, accelerated the pace of innovation and digital technology, and continued to foster a respectful workplace culture.

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In 2024, we invested approximately $240 million in capital spending projects and acquisitions. In our Wood Products segment, we completed the conversion of a plywood layup line to a parallel laminated veneer line at our Chapman, Alabama veneer and plywood mill, began multi-year projects to significantly modernize our Oakdale, Louisiana mill and to add I-joist production capabilities at our Thorsby, Alabama (EWP) mill. In our BMD segment, we acquired door and millwork assets in Boise, Idaho and Lakeland, Florida, purchased facilities we previously leased in Westfield, Massachusetts and Chicago, Illinois, and purchased additional property for our Greensboro, North Carolina facility, all as part of our long-term strategy.

In 2025, we remain committed to executing our reinvestment and growth strategies by continued capital expenditures in our mills, including Oakdale, Louisiana and Thorsby, Alabama, and in our distribution capabilities, including in our previously announced greenfield distribution centers in Texas and South Carolina.

In addition, we returned $423.7 million of cash to our shareholders by paying a special dividend of $5.00 per share, increasing our quarterly dividend to $0.21 per share in September, and repurchasing approximately 1.5 million shares of our common stock. We believe that the continued execution of our long-term growth plan and thoughtful stewardship of your capital will help ensure that you receive the benefits of our strategy and investments in the years to come.

Whether or not you plan to attend the 2025 Annual Meeting of Shareholders, your vote is important, and we encourage you to vote your shares promptly. You may vote your shares online or using a toll-free telephone number. If you received a paper copy of the proxy card by mail, you may sign, date, and mail the proxy card in the envelope provided. Instructions regarding the three methods of voting are contained on the Notice of Internet Availability of Proxy Materials and the proxy card.

MEETING INFORMATION

ITEMS OF BUSINESS

To vote on the items of business before the meeting, you may submit your proxy vote online or by telephone, as described in the Notice of Internet Availability of Proxy Materials and the following proxy statement, no later than 11:59 p.m. Eastern Daylight Time on Wednesday, April 30, 2025, for any shares you hold directly. If you received a paper copy of the proxy card by mail, you may sign, date, and mail the proxy card in the envelope provided. The envelope is addressed to our vote tabulator, Broadridge Financial Solutions, Inc., and no postage is required if mailed within the United States.

This summary highlights information contained elsewhere in this proxy statement. This summary does not contain all of the information you should consider, and you should read the entire proxy statement carefully before voting. As used in this proxy statement, unless the context otherwise indicates, the references to “Boise Cascade,” the “Company,” “we,” “our,” or “us” refer to Boise Cascade Company.

This proxy statement and 2024 Annual Report are available at www.proxyvote.com as set forth on page 76. The proxy materials, including this proxy statement and form of proxy, are first being distributed and made available to shareholders on or about March 21, 2025.

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In 2024, despite a weaker than anticipated demand environment, we successfully executed our strategy and were able to:

Deliver solid earnings in both our Wood Products and BMD segments

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Continue capital investments in support of our EWP growth strategy

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Continue growth and expansion of our BMD door and millwork capabilities

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Distribute $5.00 per share in special dividends and increase our quarterly dividend in September 2024 by 5%

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Continue innovation through active product development opportunities, including development of new products for commercial construction applications in our Wood Products segment

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Continue innovation through use of data-driven technologies to decrease equipment downtime and expand use of predictive analytics in our Wood Products segment and to increase the quality of decision making at all levels in our BMD segment

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Continue adoption of digital technology using our human capital management (HCM) system

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for core human resource functions, expanding our learning management system, and enhancing compensation processes and performance management

In our Wood Products segment, we:

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Completed the conversion of a plywood layup line to a parallel laminated veneer line at our Chapman, Alabama mill, and began the significant modernization of our Oakdale, Louisiana mill and the addition of I-joist product capabilities at our Thorsby, Alabama mill

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Started production of full frame glulam beams at our Homedale, Idaho mill to support market demand

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In our BMD segment, we:

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Acquired door and millwork assets in Boise, Idaho and Lakeland, Florida

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Purchased previously leased facilities in Westfield, Massachusetts and Chicago, Illinois, and purchased additional property for our Greensboro, North Carolina facility

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In 2025, new single-family residential construction starts are expected to be off slightly from 2024, while multi-family starts are anticipated to be down after sharp declines in 2024 and repair-and-remodel is anticipated to reflect modest growth. As market conditions dictate, we will adjust our business where needed and continue to seek ways to control expenses and variable costs without sacrificing the high service levels expected by our supplier and customer partners. In addition, given our favorable long-term outlook for the demand fundamentals that drive our business, we will continue to make investments to grow our Company and enhance the workplace experience to retain and attract talented employees. In 2025, we plan to continue executing our strategy and creating attractive returns on capital by:

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Expanding and upgrading our EWP manufacturing capabilities

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Pursuing organic growth opportunities and in- fill opportunities in strategic locations across the country for our distribution business

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Continuing our growth in door and millwork assembly capabilities

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Continuing to improve our competitiveness through operational excellence

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Using our Boise Improvement Cycle (BIC) process and business optimization group to continue to (i) increase productivity, (ii) increase equipment efficiency, and (iii) lower our costs of manufacturing

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This year’s Annual Meeting will be a virtual meeting of shareholders, which will be conducted via live webcast. You are entitled to participate in the Annual Meeting only if you were a shareholder as of the close of business on March 5, 2025, or if you hold a valid proxy for the Annual Meeting. You will be able to participate in the Annual Meeting online and submit your questions by visiting www.virtualshareholdermeeting.com/BCC2025.

Shareholders will be able to participate in our virtual Annual Meeting as if at an in-person meeting. During the live Q&A session of the meeting, members of our executive leadership team and our Board chair will answer questions as they come in, as time permits. To ensure the meeting is conducted in a manner that is fair to all shareholders,

the Board chair (or such other person designated by our Board) may exercise broad discretion in recognizing shareholders who wish to participate, the order in which questions are asked, and the amount of time devoted to any one question. We reserve the right to edit or reject questions we deem profane or otherwise inappropriate. Detailed guidelines for submitting written questions during the meeting are available at www.virtualshareholdermeeting.com/BCC2025.

We will have technicians ready to assist you with any technical difficulties you may have accessing the virtual meeting. If you encounter any difficulties accessing the meeting or during the meeting, please call the phone number provided on the virtual meeting login page.

All Directors are standing for election for a one-year term

The following tables provide summary information about each of the current Directors. Our Board recommends a FOR vote for each Director because

it believes each is qualified to serve as a Director and has made and will continue to make positive contributions to the Board. For information on our Director competencies and demographics, please see the Director Skills Matrix on page 11.

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We provide highlights of our executive compensation program below. It is important to review the Compensation Discussion & Analysis (CD&A) and compensation tables in this proxy statement for a complete understanding of our compensation program and philosophy (page 36).

We generally target compensation at the 50th percentile of comparable market compensation data, with actual compensation amounts taking into account each person’s role, performance, contributions to the Company’s success, level of experience, and other distinguishing characteristics.

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We provide at-risk performance-based pay opportunities in the form of short-term and long-term incentives.

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Our chief executive officer’s (CEO) total compensation is 52% at-risk, while our other named executive officers’ (NEO) total compensation is an average 47% at-risk.

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Short-term and long-term incentives comprise a significant portion of each NEO’s total compensation opportunity and are designed to motivate and reward our NEOs for growing the Company and maximizing long-term shareholder value.

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Long-term performance is the most important measure of our success because we manage our operations and business affairs for the long-term benefit of our shareholders.

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For 2024, our NEOs received long-term equity incentive compensation opportunities in a combination of Performance Stock Units (PSUs) and Restricted Stock Units (RSUs).

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We maintain robust clawback policies that cover time-based and performance based equity and cash awards:

Under the omnibus stock plan (the 2016 Omnibus Incentive Plan (as defined below) and as proposed to be amended and restated,

the 2025 Omnibus Incentive Plan (as defined below)), the Company has the ability to clawback all equity awards, both time-based and performance-based, upon various events including upon misconduct related to a restatement

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Additionally, under our Misconduct Clawback Policy, both time-based and performance-based incentive compensation may be subject to recoupment (i) if, as a result of a financial restatement, the award would have been lower had the financial results been properly calculated when originally reported, (ii) if an award was predicated on achieving financial results that were subsequently determined to be due to a fraudulent act by the officer or (iii) if an officer engaged in misconduct, including misconduct that results in reputational or financial harm to the Company, even if such misconduct does not result in a financial restatement.

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Finally, under our Executive Compensation Clawback Policy adopted in 2023 pursuant to Rule 10D-1 of the Exchange Act, we are required to recoup performance-based incentive compensation received on or after October 2, 2023 that was calculated based on financial results that were subsequently restated and the award received would have been lower if based on the restated results.

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Our annual incentive compensation opportunities are tied to the achievement of corporate goals and, in some cases, business segment financial goals.

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Our Insider Trading Policy prohibits all of our Directors, officers, employees, and consultants from participating in any hedging, pledging, or monetizing transaction to lock in the value of any of our securities they hold, including the purchase of any financial instrument designed to offset the risk of future declines in the market value of any of our securities.

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Over the past five years, our shareholders have shown strong support for our executive compensation program with annual vote results of over an average of 97% from 2020 to 2024. Our compensation committee continues to examine our executive compensation program to ensure alignment between our executives and the long-term interests of our shareholders.

We ask that our shareholders approve, on an advisory basis, the compensation of our NEOs as further described in Proposal No. 2 (page 35).

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2024 RSUs and PSUs under our long-term equity-based award agreements (LTIP) under our 2016 Boise Cascade Omnibus Incentive Plan (2016 Omnibus Incentive Plan) were granted in March 2024. The PSUs granted are subject to a three-year performance period. The number of shares actually awarded will range from 0% to 200% of the target amount. Achievement will be measured against the target payout based on return on invested capital (ROIC)(1) measures(2) for each

of the years 2024, 2025, and 2026. The average achievement for the three years included in the performance period shall determine the performance against target ROIC, which will be determined in February 2027, and the earned shares will be distributed in March 2027, three years from the grant date. The company believes the performance period for these PSUs aligns management with long-term shareholder value.

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All Directors are nominated for election at our 2025 Annual Meeting for a one-year term.

Shares will be voted according to shareholder instructions. If no voting instructions are provided, a broker may not vote on the matter. For 2025, our Directors are running unopposed. Therefore, to be elected to our Board in 2025, each Director must receive an affirmative vote of the majority of the votes of the shares present in person or by proxy at the meeting of the shareholders entitled to vote.

The Directors have confirmed their availability for election. If any Director becomes unavailable to

serve as a Director for any reason prior to the Annual Meeting, our Board may substitute another person as a Director. In that case, if a shareholder has voted for the original Director, those shares will be voted FOR the substitute Director.

Additional information follows for the Directors, particularly concerning their business experience and qualifications, as well as attributes and skills that led our Board to conclude that they should serve as a Director.

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Provided below in a Board Skills Matrix is a summary of each Director’s skills and experience as well as gender and racial/ethnic information. The skills categories included in the matrix are tied to the Company’s strategic goals, and the intent of the matrix is that the Directors collectively possess qualities that facilitate effective oversight of the Company’s strategic plans. While the matrix is useful for determining the collective skills of the Board as a whole, it is not a comparative measure of the value of Directors; a Director with more focused experience could nonetheless contribute broadly and effectively.

The chart below identifies the principal skills that the corporate governance and nominating committee considered for each Director when evaluating the Director’s experience and qualifications to serve as a Director. Each mark indicates a strength or personal characteristic that was self-selected by each Director. Additional information about the Director’s background and business experience is provided below in the biographical information.

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The Company Code of Ethics (Code of Ethics) applies to our Directors, officers, and employees. We have a toll-free reporting service available that permits employees to confidentially report violations of our Code of Ethics or other issues of significant concern via phone, text, or website.

If we amend or grant a waiver of one or more of the provisions of our Code of Ethics, we intend to satisfy the requirements under Item 5.05 of

Form 8-K regarding the disclosure of amendments to or waivers from provisions of our Code of Ethics by posting the required information on our website.

You may view a copy of our Code of Ethics by visiting our website at www.bc.com/investors, selecting the Corporate Governance tab, and then click on the Code of Ethics link under Governance Documents to see our Code of Ethics.

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Our Board has adopted Corporate Governance Guidelines (Guidelines) to assist the Board in exercising its responsibilities. The Guidelines reflect our Board’s commitment to monitor the effectiveness of policy and decision-making, both at the Board and management levels. Our Board believes the Guidelines will enhance our ability to achieve our goals and long-term success and will assist us in increasing shareholder value. The Guidelines are in addition to and are not intended to change or interpret any federal or state law or regulation, including the Delaware General Corporation Law, our Certificate of Incorporation or

bylaws, or the rules of the New York Stock Exchange (NYSE). Our Board may modify the Guidelines from time to time at the recommendation of the corporate governance and nominating committee and as deemed appropriate by our Board.

You may view a copy of our Guidelines by visiting our website at www.bc.com/investors, selecting the Corporate Governance tab, and then clicking on the Corporate Governance Guidelines link under Governance Documents to see our Guidelines.

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Our Directors believe Board independence is important and is key for the Board to function properly, allowing it to provide appropriate oversight and maintain managerial accountability.

We list our common stock on the NYSE. The NYSE rules require that a majority of our Directors be independent from management and that all members of our Board committees be independent. For a Director to be independent under the NYSE’s rules, our Board must determine affirmatively that he or she has no material relationship with the Company. Additionally, he or she cannot violate any of the bright line independence tests set forth in the NYSE listing rules that would prevent our Board from determining that he or she is independent. These rules contain heightened independence tests for members of our audit and compensation committees. Our Board will broadly

consider all relevant facts and circumstances to determine the independence of any Director in accordance with the NYSE listing rules.

Our Board has determined that all Directors except Mr. Jorgensen are independent directors as defined under the NYSE’s listing rules. These Directors constitute a majority of our Directors and represent all of our committee members.

Additionally, our Board has determined that (i) each member of the audit committee meets the heightened independence standards for audit committee service under the NYSE listing rules and Rule 10A-3 under the Exchange Act; and (ii) each member of the compensation committee meets the heightened independence standards for compensation committee service under the NYSE listing rules and Rule 10C-1 under the Exchange Act. Further, because Mr. Carlile is a past CEO of the Company, our Board appointed Mr. Hannah as its lead independent director upon his reelection to the Board.

Our Board and its committees can retain, at their sole discretion and at our expense, independent financial, legal, compensation, or other advisors to represent the independent interests of our Board or its committees.

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Family Relationships

No family relationships exist between any of our Directors and executive officers.

Affiliated-Company Transactions

There were no affiliated-company or related person transactions in 2024.

Policies and Procedures for Related- Person Transactions

Our written policy regarding transactions with related persons requires that a “related person” ​(as defined in paragraph (a) of Item 404 of Regulation S-K) must promptly disclose to our general counsel any “related-person transaction” (defined as any transaction that is reportable by us

under Item 404(a) of Regulation S-K in which we are or will be a participant and the amount involved exceeds $120,000, and in which any related person has or will have a direct or indirect material interest) and all material facts with respect thereto. The general counsel will promptly communicate such information to our audit committee or another independent body of our Board. No related-person transaction will be entered into without the approval or ratification of our audit committee or another independent body of our Board. It is our policy that Directors recuse themselves from any discussion or decision affecting their personal, business, or professional interests. Our policy does not specify the standards to be applied by our audit committee or another independent body of our Board in determining whether to approve or ratify a related- person transaction.

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The compensation committee continued to retain Frederic W. Cook & Co., Inc. (FW Cook) as its independent compensation consultant to assist the committee in discharging its responsibilities. In connection with retaining FW Cook, the compensation committee considered that FW Cook

does not provide any other services to the Company or management and determined that there was no conflict of interest according to the factors the compensation committee determined to be relevant, including the independence factors enumerated by the NYSE.

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Our Board oversees the risk management activities designed and implemented by our management. The Board executes its oversight responsibility for risk management both directly and through its committees. Through our annual enterprise risk management review, the Board also considers specific risk topics, including risks associated with our strategic plan, business operations, cybersecurity, AI, sustainability and environmental matters, HCM strategies (including employee engagement, growth, fostering a sense of community, and expanding our talent pipeline), recoupment of officer compensation based on our clawback policies, and capital structure. In addition, the Board receives regular detailed reports from our senior management and other personnel, including assessments and potential mitigation of the risks and exposures involved with their respective areas of responsibility.

Our Board delegates to the audit committee oversight of our risk management process. Our other committees also consider and address risks related to their respective committee responsibilities. All committees report to the Board as appropriate, including when a matter rises to a material or enterprise-level risk.

Our internal audit department annually develops a risk-based audit plan that is reviewed with the audit committee, along with the results of internal audit reviews and activities. The internal audit department also maintains a high-level assessment of risks and controls for key operations, functions, processes, applications, and systems within the Company. The audit committee meets quarterly with our chief financial officer, vice president of finance and investor relations, and our directors of internal audit and financial reporting.

The audit committee also meets quarterly with our director of information technology (IT) and our senior director of privacy to discuss security and

privacy as it relates to our data systems and data privacy. We have in place a number of independent assurance activities responsible for assessing whether our risk response activities are in place and working effectively, including, but not limited to, data security, data privacy, environmental, and safety audits.

Information Security

The Board and the audit committee engage with management on a quarterly basis regarding our IT environment, including data security and data privacy. The Company’s IT security and data privacy processes are based upon the Control Objectives for Information and Related Technology (COBIT) framework. Our IT, data privacy, and internal audit teams have individuals who have achieved Certified Governance of Enterprise IT (CGEIT), Certified Data Privacy Solutions Engineer (CDPSE), Certified Information Privacy Manager (CIPM), and Certified Information Systems Auditor (CISA) professional certifications. Continual focus on data breach response readiness by implementing activities such as tabletop exercises is a key initiative for the IT security and data privacy teams. Annually, KPMG and our internal audit team each audit our IT general controls to assess our internal control environment and the reliability of information flowing into our financial reporting. In addition, we engage a qualified third party to perform an annual penetration test as part of our ongoing assessment of our IT perimeter security and intrusion detection capabilities. The penetration test organization employs experts with the Certified Information Systems Security Professional (CISSP), Certified Information Security Manager (CISM), and GIAC certified penetration tester (GPEN) professional designations. For more information concerning our information security, please refer to Item 1C. Cybersecurity of the Company’s Form 10-K filed on February 20, 2024.

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The compensation committee, with recommendations from management, reviewed our compensation philosophy for our employees and determined that it does not induce our employees to take unacceptable levels of business risk for the purpose of increasing their incentive plan awards at the expense of shareholder interests. Some of the considerations in making this determination were:

None of our businesses presents a high-risk profile because our businesses compete in markets with a high degree of transparency on pricing and costs, as well as clearly defined revenue recognition accounting principles

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Our incentive pay structure rewards performance in both the short-term and long-term (i.e., short-term incentives are not paid at the expense of long-term shareholder value)

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Our incentive pay program has minimum and maximum targets designed to take into account short-term and long-term affordability measures, with payments capped at the maximum target

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The compensation committee reserves the right to reduce or eliminate any awards, at its discretion, with respect to our incentive pay programs

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Under the omnibus stock plan (the 2016 Omnibus Incentive Plan, and as proposed to be amended and restated, the 2025 Omnibus Incentive Plan), the Company has the ability to clawback all equity awards, both time-based and performance-based, upon various events including upon misconduct related to a restatement. Additionally, for LTIP and cash-based short-term incentive plan (STIP) awards received by an officer, our Misconduct Clawback Policy allows us to recoup any or all of the LTIP or STIP awards (both time-based and performance-based) received by an officer (i) if, as a result of a financial restatement, the award would have been lower had the financial results been properly calculated when originally

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reported, (ii) if an award was predicated on achieving financial results that were subsequently determined to be due to a fraudulent act by the officer or (iii) if an officer engaged in misconduct, including misconduct that results in reputational or financial harm to the Company, even if such misconduct does not result in a financial restatement

Our Executive Compensation Clawback Policy for our PSU and our STIP awards (only performance-based) pursuant to Rule 10D-1 of the Exchange Act that requires recoupment of any or all awards received by an NEO where the amount of the award was calculated based upon the financial results that were subsequently affected by a restatement of the Company’s financial statements and the award received would have been lower had the financial results been properly calculated when reported

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Our executive compensation program does not encourage our management to take unreasonable risks relating to the business

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Pursuant to the Company’s Insider Trading Policy, we prohibit all of our Directors, officers, employees, and consultants from participating in any hedging, pledging, or monetizing transactions to lock in the value of any of our securities that they hold, including the purchase of any financial instrument designed to offset the risk of future declines in the market value of any of our securities

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The Company has an Insider Trading Policy governing the purchase, sale and other dispositions of Company securities by Directors, officers, employees, and the Company itself that is reasonably designed to promote compliance with insider trading laws, rules and regulations, and listing standards. A copy of the policy was filed as Exhibit 19.1 to our Annual Report on Form 10-K for the fiscal year ended December 31, 2024.

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Our corporate governance and nominating committee is responsible for, among other matters:

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Identifying individuals qualified to become Directors, consistent with criteria approved by our Board

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Recommending to our Board a slate of Directors for election at the annual meeting of shareholders

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Recommending to our Board persons to fill Board and committee vacancies

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Through this process, members of the corporate governance and nominating committee consult with our Board chair and lead independent director and accept nominee recommendations from other Directors and/or shareholders in accordance with the terms of our Certificate of Incorporation and bylaws. The invitation to join our Board is extended by our Board through our Board chair and lead independent director.

Suitability of Candidates

In evaluating the suitability of candidates, in addition to our ongoing and emerging business needs, our Board and corporate governance and nominating committee consider many factors, including a candidate’s:

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Experience as a senior officer in a public company, substantial private company experience, or other comparable experience

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Experience as a director of a public company

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Breadth of knowledge about issues affecting the Company and/or its industry

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Expertise in finance, logistics, manufacturing, distribution, law, human resources, cybersecurity, technology and innovation, marketing or other areas that our Board determines are important areas of needed expertise

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Personal attributes that include integrity and sound ethical character, absence of legal or regulatory impediments, absence of conflicts of interest, demonstrated track record of achievement, ability to act in an oversight capacity, appreciation for the issues confronting a public company, adequate time to devote to our Board and its committees, and willingness to assume Board fiduciary responsibilities on behalf of all shareholders

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The corporate governance and nominating committee is committed to a highly functioning Board where the composition is reflective of the long-term strategy of the business, and makes

decisions primarily on the basis of skills, qualifications, and experience. Input from the Board, management, feedback from shareholders, and Board evaluation processes also help determine desired backgrounds and skills.

Other Considerations in Nomination Process

As of the 2025 Annual Meeting, upon the reelection of all Director nominees to the Board, our Board will consist of eight men and three women with a rich mixture of educational, professional, and experiential differences representing a wide range of perspectives to further enhance the effectiveness of its oversight role. As opportunities to appoint and nominate new Directors become available as the Board builds the slate of Director nominees, in addition to the factors set forth above, our Board recognizes and values candidates and Directors who bring different perspectives. Openness to all perspectives enriches the current and long-term strategic needs of the Company.

Information regarding the skills of our Directors can be found in the Director Skills Matrix on page 11.

Shareholder Nominations for Directors

In accordance with our bylaws, the corporate governance and nominating committee will consider shareholder nominations for Directors (please refer to the Shareholder Proposals for Inclusion in Next Year’s Proxy Statement section in this proxy statement for related instructions, page 78). We did not receive any shareholder nominations or recommendations for a Director in connection with the 2025 Annual Meeting. Other than the procedures set forth in our bylaws, the corporate governance and nominating committee has not adopted formal policies regarding shareholder nominations for Directors because the committee does not believe such policy is necessary for the consideration of shareholder nominations.

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In December of each year, under the direction of the corporate governance and nominating committee, our Directors complete written surveys to evaluate and assess the overall effectiveness of our Board, its committees, and each Director. The purpose of the Board, committee(s), and individual Director surveys is to continually improve Board performance. Our lead independent director and our Board chair review the Directors’ responses and provide the individual Directors, the corporate governance and nominating committee, and the Board with an assessment of the performance of the

Board and its committees. The Directors then discuss the results and proposed actions for improvement or change in an executive session chaired by our lead independent director. The lead independent director and Board chair also have one- on-one discussions as necessary with each Director about the feedback received. Through this process, the Board and management work together to refine the meeting materials and topics covered with the Board to educate new members and highlight certain strategic projects.

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The Board believes that wider perspectives and best practices learned by Directors serving in other public directorships must be balanced against the time commitment that service on boards entails. Therefore, our Guidelines include a policy whereby our non-employee Directors are limited to no more than three public boards, (in addition to the Board),

and our CEO to one additional public board. You may view a copy of our Guidelines by visiting our website at www.bc.com/investors, selecting the Corporate Governance tab, and then clicking on the Corporate Governance Guidelines link under Governance Documents to see our Guidelines.

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Shareholders and other interested parties may contact our Board, or any of its committees, non- management Directors or any individual Directors by writing to the lead independent director, at the address or email address shown below. All correspondence will be referred to the corporate governance & nominating chair, the Board chair, and our corporate secretary.

We have an email link to our Board on our website at www.bc.com/investors; select the Corporate Governance tab, then click on the Board of Directors link; scroll to the bottom of page for the Contact the Board email form.

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We believe engaging in active dialogue with our shareholders is important to our commitment to deliver sustainable long-term value to our shareholders on an annual basis, we actively seek engagement with our top 10 shareholders. In 2024, we continued our engagements with shareholders representing approximately 19.57% of our outstanding shares, which provided them opportunities to discuss various issues, including macro effects on our business, fundamental demand and supply chain, corporate governance, executive compensation, capital allocation strategy, risk oversight, sustainability, HCM strategies (including employee engagement, growth, fostering a sense of community, and expanding our talent

pipeline), responsible forestry and environmental sustainability practices, and forest certification. Shareholder feedback is regularly reviewed and considered by the Board and is reflected in adjustments and enhancements to our policies and practices. This includes providing additional sustainability disclosures on our website that are aligned with the guidelines of the Task Force on Climate-Related Financial Disclosures (TCFD) and Sustainability Accounting Standards Board (SASB). In 2024, shareholder feedback was also reflected in our increasing the performance period for executive long-term, performance based, incentive compensation from one year to three years.

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The corporate governance and nominating committee is primarily responsible for sustainability matters, and similar to risk oversight, the Board participates in the process and oversight of such strategy. At each meeting, management updates the corporate governance and nominating committee, and the Directors provide guidance on current sustainability topics, including climate and environmental sustainability, and other similar issues that impact the Company. On at least an annual basis, the corporate governance and nominating committee is provided with a more in-depth review of these sustainability topics by either management or a third-party consultant. At each Board meeting, management updates the Board, and the Directors provide guidance on HCM strategies (including employee engagement, growth, fostering a sense of community, and expanding our talent pipeline).

Our Board supports an approach to sustainability matters that is embedded in our Company purpose to bring people, products, and services together to build strong homes, businesses, and communities that stand the test of time. We are a business built on relationships. Our core values guide our actions, unite our employees, and define our brand. We care about relationships with our employees, customers, suppliers, shareholders, and the communities where we live and operate. We strive to foster a respectful workplace culture as a way of living our core values of respect and pursuit of excellence, and that creates connection where everyone feels seen, heard, and valued. We further believe it is our responsibility as an employer and community leader to have a positive influence in the communities where we live and operate.

Boise Cascade considers environmental responsibility an integral component of our Wood Products and BMD segments. We transform renewable resources, trees, into products that people depend on every day. Our wood products store carbon for years, giving us the opportunity to respond to the effects of climate change through our environmental sustainability practices when procuring and processing wood.

Through sustainable forestry practices, we actively contribute to the responsible use and protection of natural capital, which benefits our employees, customers, shareholders, and the communities where we live and operate. We are committed to responsible forest management principles that help protect and conserve forest habitat and biodiversity. We have rigorous procurement programs to comply with state and provincial laws to protect conservation values and culturally important sites which include measures to protect water quality and conserve wildlife habitat. Further, we are committed to continually achieving compliance with certification standards, employing management practices within our operations to comply with environmental laws and regulations, and promoting sustainable practices. The strength of our sustainable forestry program is annually verified by internal and third-party auditors as part of our continuous improvement efforts.

We recognize the scientific evidence indicating a changing climate associated with increasing CO2 in the atmosphere, and use the TCFD framework for communicating our position and performance on climate-related matters. To further enhance our ability to track and report on climate-related issues, the Company continues implementation of a comprehensive program to collect material Scope 1 and 2 greenhouse gas (GHG) emissions data. This is an important step in understanding the emissions impact of the Company’s operations and allows reporting climate metrics in the TCFD framework. In addition to using trees, a renewable resource that sequesters carbon, in our manufacturing processes, the Company is able to use the bark from trees and manufacturing residuals for a significant portion of energy needs in our manufacturing operations. This allows utilization of carbon-neutral energy sources and reduces reliance on energy sources derived from fossil fuels. Using biomass to produce energy also reduces landfill waste, which results in less GHG and methane emissions.

The Company engages in pilot programs to explore additional positive climate impacts that can be made through our operations. In 2024, the Company added its first zero-emissions electric Class 8 truck to its fleet and started producing biochar out of wood waste to use as a carbon-storing soil enhancer by the landscaping industry. Our value of pursuit of excellence guides our climate actions to implement new ideas to drive sustainable results.

The safety of our employees is a core value, and the Company maintains robust safety programs focused on identifying hazards and eliminating risks, as well as safety processes and procedures aimed at eliminating injuries in the workplace. The Company recognizes the demands of balancing work, family, and personal obligations and we believe we are better when we work together to serve our customers, find creative solutions, and enrich our culture. Although the nature of most of our jobs in our Wood Products and BMD segments cannot be accomplished remotely or accommodate multiple flexible schedules, we are open to listening, learning, and providing flexible work arrangements where practical and productive.

Our Total Rewards program provides competitive pay, comprehensive health benefits, robust financial security resources, paid leave, well-being programs, community engagement opportunities, and career recognition and development. We continually benchmark our offerings and assess our vendor partner performance to ensure our Total Rewards remain competitive. Selecting and developing talent is a vital aspect of our HCM strategy because we believe our employees are at the heart of our purpose and fulfillment of our promise to our shareholders. We focus on developing talent from within our business segments and supplement that talent with finding the right external hires to support key strategic objectives. Individual development includes annual performance reviews with development plans, access to a variety of resources, including self-help resources, and continuing education opportunities. Our employees are able to participate in training through a combination of online platforms and in-person learning. We work towards business continuity and personal leadership growth by developing our employees as individuals through targeted leadership programs, coaching, and focused experiences. Employees are able to connect with our officers through our open-door policy and directly with our CEO in small group quarterly

listening sessions and have the ability to ask questions to the larger officer team during our quarterly results calls. Further, we encourage and support employees who contribute service hours to boards and nonprofit organizations in the communities where they live and work. These programs enable the Company’s employees to connect with the community, further improve the Company’s reputation locally, and instill a sense of pride in the workforce.

Embedded in our core values is a focus on our people — building community and growing our people and our business. Boise Cascade is invested in broadening our talent pipeline and fostering a respectful workplace culture that attracts and retains a talented workforce, and are committed to fostering a workplace culture where everyone feels seen, heard, and valued-one where all employees can contribute their best work to our short- and long-term financial success. This work starts at the top with our Board and our executive leadership team and provides employee engagement opportunities at all levels.

The Company has a human resources technology system that provides a simple, integrated experience for our employees, including learning management, performance management, self-service, and document management processes.

Additional information about our sustainability programs can be found by going to our website, www.bc.com, and selecting Our Company at the top dropdown menu of the page, then Sustainability. This is the Company sustainability page, which includes our CEO sustainability commitment letter. From the Company Sustainability page, you can select Environment which provides additional information on the Company’s environmental programs, including TCFD, environmental management, forest certifications, and sustainable forestry. From the Company Environment page, you can also select Our Environmental Policies at the bottom of the page, which provides links to additional policies, including our Conflict Minerals Policy, Environmental Policy, Sustainable Forestry Implementation Policy, and Wood and Forest Based Product Procurement Policy. From the Company Sustainability page, you can select Social which provides additional information on the Company’s culture, such as safety, community strengthening, and our associate experience (including employee engagement, growth, fostering a sense of community, and expanding our talent pipeline). From the Company Social page, you can also select Our Policies at the bottom of the page, which provides links to additional policies, including Bribery, Anti- Corruption, and Improper Payments,

Corporate Ethics and Compliance, Equal Opportunity, Anti- Discrimination, and Anti-Harassment, Fair Labor

Practices, Human Rights Statement, and Supply Chain. The Company Privacy Policy can be viewed

from our website home page (www.bc.com), or any other Company website page, by selecting Privacy Policy at the bottom of the page.

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