PR Permian Resources Corporation

Exhibit 1.1

Permian Resources Corporation

51,765,000 Shares of Class A Common Stock, par value $0.0001 per share

Underwriting Agreement

May 13, 2024

Goldman Sachs & Co. LLC

200 West Street

New York, NY 10282-2198

As the representative (the “Representative”) of the several Underwriters

named in Schedule I hereto

Ladies and Gentlemen:

The stockholders named in Schedule II hereto (the “Selling Stockholders”) of Permian Resources Corporation, a Delaware corporation (the “Company”), propose, subject to the terms and conditions stated in this agreement (this “Agreement”), to sell to the Underwriters named in Schedule I hereto (the “Underwriters”) an aggregate of 51,765,000 shares (the “Shares”) of Class A Common Stock, par value $0.0001 per share (“Stock”), of the Company. To the extent there are no additional Underwriters listed on Schedule I other than you, the term Representative as used herein shall mean you, as Underwriters, and the terms Representative and Underwriters shall mean either the singular or plural as the context requires.

A portion of the Shares consist of shares of Stock that are issuable upon redemption of common units representing limited liability company interests (the “OpCo Units”) of Permian Resources Operating, LLC, a Delaware limited liability company (“OpCo”), together with the redemption of a corresponding number of shares of Class C Common Stock, par value $0.0001 per share (the “Class C Common Stock”), of the Company, pursuant to the Seventh Amended and Restated Limited Liability Company Agreement of OpCo, dated November 1, 2023 (the “OpCo LLC Agreement”), immediately prior to the Time of Delivery (as hereinafter defined) on which the Shares are to be sold (such redemption being hereinafter referred to as a “Redemption Transaction” and any such Shares issued in a Redemption Transaction hereinafter referred to as “Redemption Shares”). In order to exercise their redemption right pursuant to the terms of the OpCo LLC Agreement, the Selling Stockholders participating in the Redemption Transaction shall (to the extent not heretofore delivered) deliver a Redemption Notice (as defined in the OpCo LLC Agreement) to the Company and OpCo prior to the Time of Delivery.

1. a) The Company represents and warrants to, and agrees with, each of the Underwriters that:

(i) The Registration Statement on Form S-3 (File No. 333-275405), which became immediately effective upon filing with the U.S. Securities and Exchange Commission (the “Commission”) on November 8, 2023 (the “Initial Registration Statement”), under the Securities Act of 1933, as amended (the “Securities Act”) in respect of the Shares has been filed with the Commission; the Initial Registration Statement and

any post-effective amendment thereto, each in the form heretofore delivered to you, became effective upon filing with the Commission in such form, and no stop order suspending the effectiveness of the Initial Registration Statement, or any post-effective amendment thereto, if any, has been issued and no proceeding for that purpose has been initiated or threatened by the Commission (the various parts of the Initial Registration Statement, including all exhibits thereto and including the information contained in the form of final prospectus filed with the Commission pursuant to Rule 424(b) under the Securities Act in accordance with Section 5(a) hereof and deemed by virtue of Rule 430B under the Securities Act to be part of the Initial Registration Statement at the time it was declared effective (hereinafter called a “Base Prospectus”), each as amended at the time such part of the Initial Registration Statement became effective, including the information, if any, deemed pursuant to Rule 430A, 430B or 430C under the Securities Act to be part of the Initial Registration Statement at the time of its effectiveness, are hereinafter collectively called a “Registration Statement;” any preliminary prospectus (including any preliminary prospectus supplement) relating to the Shares filed with the Commission pursuant to Rule 424(b) under the Securities Act is hereinafter called the “Preliminary Prospectus;” any Base Prospectus relating to the Shares that was included in the Registration Statement immediately prior to the Applicable Time (as defined in Section 1(a)(iii) hereof) is hereinafter called the “Pricing Prospectus;” such final prospectus, in the form first filed pursuant to Rule 424(b) under the Securities Act, is hereinafter called the “Prospectus;” any reference herein to any Base Prospectus, the Pricing Prospectus, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include the documents incorporated by reference therein pursuant to Item 12 of Form S–3 under the Securities Act, as of the date of such prospectus; any reference to any amendment or supplement to any Base Prospectus, any Preliminary Prospectus or the Prospectus shall be deemed to refer to and include any documents filed after the date of such Base Prospectus, Preliminary Prospectus or Prospectus, as the case may be, under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and incorporated therein; any reference to any amendment to the Registration Statement shall be deemed to refer to and include any annual report of the Company filed pursuant to Section 13(a) or 15(d) of the Exchange Act after the effective date of the Initial Registration Statement that is incorporated by reference in the prospectus contained in the Registration Statement; and any “issuer free writing prospectus” as defined in Rule 433 under the Securities Act relating to the Shares is hereinafter called an “Issuer Free Writing Prospectus”).

(ii) (A) No order preventing or suspending the use of any Base Prospectus or any Issuer Free Writing Prospectus has been issued by the Commission and no proceeding for that purpose or pursuant to Section 8A of the Securities Act against the Company or related to the offering of the Shares has been initiated or threatened by the Commission, and (B) each Base Prospectus, at the time of filing thereof, conformed in all material respects to the requirements of the Securities Act and the rules and regulations of the Commission thereunder, and did not include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with the Underwriter Information (as defined in Section 9(c) of this Agreement);

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(iii) For the purposes of this Agreement, the “Applicable Time” is 6:30 a.m. (Eastern time) on the date of this Agreement; the Pricing Prospectus, as supplemented by the information listed on Schedule III(c) hereto, taken together (collectively, the “Pricing Disclosure Package”), as of the Applicable Time, did not include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; and each Issuer Free Writing Prospectus, as of its issue date, does not conflict with the information contained in the Registration Statement, the Pricing Prospectus or the Prospectus, and each Issuer Free Writing Prospectus, as supplemented by and taken together with the Pricing Disclosure Package, as of the Applicable Time, did not, include any untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in reliance upon and in conformity with the Underwriter Information;

(iv) The documents incorporated by reference in each of the Registration Statement, the Pricing Prospectus and the Prospectus, when they became effective or were or hereafter are filed with the Commission, as the case may be, conformed in all material respects to the requirements of the Securities Act or the Exchange Act, as applicable, and none of such documents included an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, contained in any part thereof at any time or upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, and in the case of the Pricing Prospectus and the Prospectus and any amendment or supplement thereto, included in any part thereof as of any time or upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to statements or omissions made in reliance upon and in conformity with the Underwriter Information; and any further documents so filed and incorporated by reference in the Prospectus or any further amendment or supplement thereto, when such documents become effective or are filed with the Commission, as the case may be, will conform in all material respects to the requirements of the Securities Act or the Exchange Act, as applicable, and the rules and regulations of the Commission thereunder and will not contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not misleading; and no such or any other documents were filed with the Commission since the Commission’s close of business on the business day immediately prior to the date of this Agreement and prior to the execution of this Agreement, except as set forth on Schedule III(b) hereto;

(v) The Registration Statement, at the Effective Time and at the Time of Delivery, conforms, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus, on their respective dates and at the Time of Delivery, will conform, in all material respects to the requirements of the Securities Act and the rules and regulations of the Commission thereunder and do not and will not, as of the applicable effective date as to each part of the Registration Statement, as of the applicable filing date as to the Prospectus and any amendment or supplement thereto, and as of the Time of Delivery, include an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, contained in any part thereof at any time or upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, and in the case of the Prospectus and any amendment or supplement thereto, included in any part

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thereof as of any time or upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading; provided, however, that this representation and warranty shall not apply to any statements or omissions made in reliance upon and in conformity with the Underwriter Information;

(vi) The financial statements and the related notes thereto of the Company and its subsidiaries included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus present fairly in all material respects the financial position of the Company and its subsidiaries, as of the dates indicated and the results of their operations and the changes in their cash flows for the periods specified; such financial statements have been prepared in conformity with U.S. generally accepted accounting principles (“GAAP”) applied on a consistent basis throughout the periods covered thereby; and the other financial information of the Company and its subsidiaries included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus has been derived from the accounting records of the Company and its subsidiaries and presents fairly the information shown thereby; and the pro forma financial information and the related notes thereto of the Company and its subsidiaries included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus has been prepared in accordance with the Commission’s rules and guidance with respect to pro forma financial information, and the assumptions underlying such pro forma financial information are reasonable and are set forth or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus. To the knowledge of the Company, (a) the financial statements of Earthstone Energy, Inc. and its subsidiaries (“ESTE”), and the related notes thereto included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus present fairly in all material respects the financial position of ESTE and its subsidiaries, as of the dates indicated and the results of their operations and the changes in their cash flows for the periods specified, (b) the financial statements of Novo Oil & Gas Holdings, LLC and its subsidiaries (“Novo”), and the related notes thereto included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus present fairly in all material respects the financial position of Novo and its subsidiaries, as of the dates indicated and the results of their operations and the changes in their cash flows for the periods specified, and (c) such financial statements have been prepared in conformity with GAAP applied on a consistent basis throughout the periods covered thereby. The interactive data in eXtensible Business Reporting Language included or incorporated by reference in each of the Base Prospectus, the Pricing Disclosure Package and the Prospectus fairly presents the information called for in all material respects and has been prepared in accordance with the Commission’s rules and guidelines applicable thereto. Other than those that have been included or disclosed in the financial statements and the related notes thereto of the Company included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus, the Company and its consolidated subsidiaries do not have any material liabilities or obligations, direct or contingent (including any off-balance sheet obligations or “variable interest entities” within the meaning of the Financial Accounting Standards Board Interpretation No. 46);

(vii) Since the date of the most recent financial statements of the Company included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus, (i) there has not been any material reduction in the capital stock or material increase in the long-term debt of the Company or any of its subsidiaries, or any dividend or distribution of any kind declared, set aside for payment, paid or made by the Company on any class of capital stock, or any material adverse change, or any development

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involving a prospective material adverse change, in or affecting the business, properties, management, financial position, stockholders’ equity, results of operations or prospects of the Company and its subsidiaries taken as a whole; (ii) neither the Company nor any of its subsidiaries has entered into any transaction or agreement that is material to the Company and its subsidiaries taken as a whole or incurred any liability or obligation, direct or contingent, that is material to the Company and its subsidiaries taken as a whole; and (iii) neither the Company nor any of its subsidiaries has sustained any loss or interference with its business that is material to the Company and its subsidiaries taken as a whole and that is either from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor disturbance or dispute or any action, order or decree of any court or arbitrator or governmental or regulatory authority, except in each case as otherwise disclosed in each of the Pricing Disclosure Package and the Prospectus;

(viii) The Company and each of its subsidiaries have been duly incorporated or organized and are validly existing and in good standing under the laws of their respective jurisdictions of organization, are duly qualified to do business and are in good standing in each jurisdiction in which their respective ownership or lease of property or the conduct of their respective businesses as described in the Pricing Disclosure Package and the Prospectus requires such qualification, and have all power and authority (corporate or other, as applicable) necessary to own or hold their respective properties and to conduct the businesses in which they are engaged as described in the Pricing Disclosure Package and the Prospectus, except where the failure to be so qualified, in good standing or have such power or authority would not, individually or in the aggregate, have a material adverse effect on the business, properties, management, financial position, stockholders’ equity, results of operations or prospects of the Company and its subsidiaries taken as a whole or on the performance by the Company of its obligations under this Agreement (a “Material Adverse Effect”). The Company does not own or control, directly or indirectly, any corporation, association or other entity that, individually or in the aggregate with any other such entities, constitutes a “significant subsidiary” as defined by Rule 1-02 of Regulation S-X other than the subsidiaries listed in Schedule V to this Agreement;

(ix) The Company has the full right, power and corporate authority to execute and deliver this Agreement and to perform its obligations hereunder; and all action required to be taken for the due and proper authorization, execution and delivery by it of this Agreement and the consummation of the transactions contemplated hereby has been duly and validly taken;

(x) The Company had the authorized capitalization as set forth in the Pricing Prospectus as of the date specified therein; and all of the issued shares of capital stock of the Company have been duly and validly authorized and issued and are fully paid and non-assessable and conform in all material respects to the description of the Stock contained in the Pricing Disclosure Package and the Prospectus at the Time of Delivery; the Redemption Shares, upon issuance in a Redemption Transaction as contemplated by the Pricing Disclosure Package and the Prospectus prior to the Time of Delivery, will have been duly authorized, validly issued, fully paid and non-assessable and will conform in all material respects to the description of the Stock contained in the Pricing Disclosure Package and the Prospectus; the stockholders of the Company have no preemptive or similar rights with respect to the Shares; and all of the issued shares of capital stock of each subsidiary of the Company have been duly and validly authorized and issued, are fully paid and non-assessable (except as non-assessability may be affected by applicable state law), are not subject to any pre-emptive or similar rights and, all such issued shares

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that are owned directly or indirectly by the Company are free and clear of all liens, encumbrances or defects, except for (A) such liens or encumbrances described in the Pricing Prospectus and the Prospectus and (B) such liens or encumbrances described in the Third Amended and Restated Credit Agreement, dated as of February 18, 2022, by and among Centennial Resource Production, LLC, the guarantors party thereto, JPMorgan Chase Bank, National Association, as administrative agent, and the lenders party thereto, as amended (the “Credit Agreement”);

(xi) This Agreement has been duly authorized, executed and delivered by the Company;

(xii) None of the Company or any of its subsidiaries is (i) in violation of its respective charter, certificate of formation, certificate of limited partnership, limited liability company agreement or bylaws or similar organizational documents; (ii) in default, and no event has occurred that, with notice or lapse of time or both, would constitute such a default, in the due performance or observance of any term, covenant or condition contained in any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any of the property or assets of the Company or any of its subsidiaries is subject; or (iii) in violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental or regulatory authority, except, in the case of clauses (ii) and (iii) above, for any such default or violation that would not, individually or in the aggregate, have a Material Adverse Effect;

(xiii) The execution, delivery and performance by the Company of this Agreement and compliance by the Company with the terms thereof and the consummation of the transactions contemplated by this Agreement will not (i) conflict with or result in a breach or violation by the Company or any of its subsidiaries of any of the terms or provisions of, or constitute a default under, result in the termination, modification or acceleration of, or result in the creation or imposition of any lien, charge or encumbrance upon any property, right or asset of the Company or any of its subsidiaries pursuant to, any indenture, mortgage, deed of trust, loan agreement or other agreement or instrument to which the Company or any of its subsidiaries is a party or by which the Company or any of its subsidiaries is bound or to which any property or asset of the Company or any of its subsidiaries is subject, (ii) result in any violation of the provisions of the charter or by-laws or similar organizational documents of the Company or any of its subsidiaries or (iii) result in the violation of any law or statute or any judgment, order, rule or regulation of any court or arbitrator or governmental or regulatory authority, except, in the case of clauses (i) and (iii) above, for any such conflict, breach, violation, default, lien, charge or encumbrance that would not, individually or in the aggregate, have a Material Adverse Effect;

(xiv) No consent, approval, authorization, order, registration or qualification of or with any court or arbitrator or governmental or regulatory authority is required for the execution, delivery and performance by the Company of this Agreement and the consummation of the transactions contemplated by this Agreement, except for such consents, approvals, authorizations, orders and registrations or qualifications (i) as may be required under applicable state or foreign securities laws, (ii) that have been obtained or made or (iii) such other consents, approvals, authorizations, orders and registrations or qualifications the failure of which to obtain or make would not reasonably be expected to, individually or in the aggregate, have a Material Adverse Effect; and (a) there are no current or pending Actions that are required under the Securities Act to be described in

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the Registration Statement, the Pricing Disclosure Package or the Prospectus that are not so described in the Registration Statement, the Pricing Disclosure Package and the Prospectus and (b) there are no statutes, regulations or contracts or other documents that are required under the Securities Act to be filed as exhibits to the Registration Statement or described in the Registration Statement, the Pricing Disclosure Package or the Prospectus that are not so filed as exhibits to the Registration Statement or described in the Registration Statement, the Pricing Disclosure Package and the Prospectus;

(xv) Except as described in each of the Pricing Disclosure Package and the Prospectus, there are no legal, governmental or regulatory investigations, actions, demands, claims, suits, arbitrations, inquiries or proceedings (collectively, “Actions”) pending to which the Company or any of its subsidiaries is or may be a party or to which any property of the Company or any of its subsidiaries is or may be the subject that, individually or in the aggregate, if determined adversely to the Company or any of its subsidiaries, could reasonably be expected to have a Material Adverse Effect; and no such Actions are threatened or, to the knowledge of the Company, contemplated by any governmental or regulatory authority or threatened by others;

(xvi) The statements set forth in the Pricing Prospectus and the Prospectus under the caption “Description of Common Stock,” insofar as they purport to constitute a summary of the terms of the Stock, under the caption “Material U.S. Federal Income Tax Considerations for Non-U.S. Holders,” and under the caption “Underwriting,” insofar as they purport to describe the provisions of the laws and documents referred to therein, are accurate, complete and fair in all material respects;

(xvii) The Stock, including the Shares, are listed on The New York Stock Exchange (the “Exchange”), other than any such shares that are Redemption Shares, which have been approved for listing subject to official notice of issuance;

(xviii) The Company is not required to register as an “investment company” or an entity “controlled” by an “investment company” within the meaning of the Investment Company Act of 1940, as amended, and the rules and regulations of the Commission thereunder;

(xix) KPMG LLP, who has audited or reviewed certain financial statements of the Company and its subsidiaries, is an independent registered public accounting firm with respect to the Company and its subsidiaries within the applicable rules and regulations adopted by the Commission and the Public Company Accounting Oversight Board (United States) (the “PCAOB”) and as required by the Securities Act;

(xx) Moss Adams LLP, who has audited or reviewed certain financial statements of ESTE and its subsidiaries, has represented to the Company that it is an independent registered public accounting firm with respect to ESTE and its subsidiaries within the applicable rules and regulations adopted by the Commission and the PCAOB and as required by the Securities Act;

(xxi) Moss Adams LLP, who has audited or reviewed certain financial statements of Novo, has represented to the Company that it is an independent accounting firm with respect to Novo within the applicable rules of the American Institute of Certified Public Accountants’ Code of Professional Conduct and its interpretations;

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(xxii) The Company and its subsidiaries have (i) defensible title to all of their interests in their producing oil and gas properties and to all of their material interests in nonproducing oil and gas properties described or incorporated by reference in the Pricing Disclosure Package and Prospectus as being owned or leased by them, title investigations having been carried out in accordance with the general practice in the oil and gas industry in the areas in which the Company and its subsidiaries operate and (ii) good and marketable title to, or have valid rights to lease or otherwise use, all other items of real and personal property that are material to the respective businesses of the Company and its subsidiaries, in each case free and clear of all liens, encumbrances, claims and defects and imperfections of title except those (i) royalties, overriding royalties and other burdens under oil and gas leases, (ii) those that are described or incorporated by reference in the Pricing Disclosure Package or the Prospectus, (iii) those that (A) do not materially interfere with the use made and proposed to be made of such property by the Company and its subsidiaries, (B) those that would not reasonably be expected, individually or in the aggregate, to have a Material Adverse Effect, or (C) secure the Credit Agreement;

(xxiii) (i) The Company and its subsidiaries own, possess, have or can acquire on reasonable terms the right to use all patents, patent applications, trademarks, service marks, trade names, trademark registrations, service mark registrations, domain names and other source indicators, copyrights and copyrightable works, know-how, trade secrets, systems, procedures, proprietary or confidential information and all other worldwide intellectual property, industrial property and proprietary rights (collectively, “Intellectual Property”) necessary in the conduct of their respective businesses; (ii) the Company’s and its subsidiaries’ conduct of their respective businesses does not infringe, misappropriate or otherwise violate any Intellectual Property of any person; (iii) the Company and its subsidiaries have not received any written notice of any claim relating to Intellectual Property; and (iv) to the knowledge of the Company, the Intellectual Property of the Company and its subsidiaries is not being infringed, misappropriated or otherwise violated by any person, except, in each case, as would not be expected, in the aggregate, to have a Material Adverse Effect;

(xxiv) No relationship, direct or indirect, exists between or among the Company or any of its subsidiaries, on the one hand, and the directors, officers, stockholders, customers, suppliers or other affiliates of the Company or any of its subsidiaries, on the other hand, that is required by the Securities Act to be described in the Registration Statement and that is not so described in each of the Pricing Disclosure Package and the Prospectus;

(xxv) (i) The Company and its subsidiaries have filed all U.S. federal, state, local and non-foreign tax returns that are required to be filed or have requested extensions thereof (except in any case in which the failure to so file would not reasonably be expected to have a Material Adverse Effect) and (ii) except as otherwise disclosed in the Pricing Disclosure Package and the Prospectus, the Company and its subsidiaries have paid all taxes (including any assessments, fines or penalties) required to be paid by them, except for any such taxes, assessments, fines or penalties currently being contested in good faith and with respect to which appropriate reserves have been established in accordance with GAAP or as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect;

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(xxvi) The Company and its subsidiaries possess all licenses, sub-licenses, certificates, permits and other authorizations issued by, and have made all declarations and filings with, the appropriate federal, state, local or foreign governmental or regulatory authorities that are necessary for the ownership or lease of their respective properties or the conduct of their respective businesses as described in each of the Pricing Disclosure Package and the Prospectus, except where the failure to possess or make the same would not, individually or in the aggregate, have a Material Adverse Effect; and except as described in each of the Pricing Disclosure Package and the Prospectus, none of the Company or any of its subsidiaries has received notice of any revocation or modification of any such license, sub-license, certificate, permit or authorization or has any reason to believe that any such license, sub-license, certificate, permit or authorization will not be renewed in the ordinary course, except as would not, individually or in the aggregate, result in a Material Adverse Effect;

(xxvii) No labor dispute with employees of the Company or any of its subsidiaries exists or, to the knowledge of the Company, is imminent that would have a Material Adverse Effect or except as described in the Pricing Disclosure Package and the Prospectus;

(xxviii) (i) The Company and its subsidiaries (A) are in compliance with all, and have not violated any, applicable federal, state, local and foreign laws, rules, regulations, requirements, decisions, judgments, decrees, orders, the common law and other legally enforceable requirements relating to pollution or the protection of the environment, natural resources, or, human health and safety (as such relates to exposure to Hazardous Materials (as defined below)), including those relating to the generation, storage, treatment, use, handling, transportation, Release or threat of Release of Hazardous Materials (collectively, “Environmental Laws”), (B) have received and are in compliance with all, and have not violated any, permits, licenses, certificates or other authorizations or approvals required of them under applicable Environmental Laws for the ownership or lease of their respective properties or to conduct their respective businesses and have no reason to believe that any such permit, license, certificate or other authorization or approval will not be renewed in the ordinary course, (C) have not received notice of any actual or potential liability under or relating to, or actual or potential violation of, any Environmental Laws, including for the investigation or remediation of any Release or threat of Release of Hazardous Materials, and have no knowledge of any event or condition that would reasonably be expected to result in any such notice, (D) are not conducting or paying for, in whole or in part, any investigation, remediation or other corrective action pursuant to any Environmental Law at any location, and (E) are not a party to any order, decree or agreement that imposes any obligation or liability under any Environmental Law, and (ii) there are no costs or liabilities associated with Environmental Laws of or relating to the Company or its subsidiaries, except in the case of each of (i) and (ii) above, for any such matter, as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect; and (iii) except as described in each of the Pricing Disclosure Package and Prospectus, (A) there are no proceedings that are pending, or that are known to be contemplated, against the Company or any of its subsidiaries under any Environmental Laws in which a governmental entity is also a party, other than such proceedings regarding which it is reasonably believed no monetary sanctions of $300,000 or more will be imposed, (B) the Company and its subsidiaries are not aware of any facts or issues regarding compliance with Environmental Laws, or liabilities or other obligations under Environmental Laws, including the Release or threat of Release of Hazardous Materials, that could reasonably be expected to have a material effect on the capital expenditures, earnings or competitive position of the Company and its subsidiaries, and (C) none of the Company and its subsidiaries anticipates material capital expenditures relating to any Environmental Laws;

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(xxix) There has been no storage, generation, transportation, use, handling, treatment, Release or threat of Release of Hazardous Materials by, relating to or caused by the Company or any of its subsidiaries (or, to the knowledge of the Company or any of its subsidiaries, any other entity (including any predecessor) for whose acts or omissions the Company or any of its subsidiaries is or could reasonably be expected to be liable) at, on, under or from any property or facility now or previously owned, operated or leased by the Company or any of its subsidiaries, or at, on, under or from any other property or facility, in violation of any Environmental Laws or in a manner or amount or to a location that could reasonably be expected to result in any liability under any Environmental Law, except for any violation or liability which would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. “Hazardous Materials” means any material, chemical, substance, waste, pollutant, contaminant, compound, mixture, or constituent thereof, in any form or amount, including petroleum (including crude oil or any fraction thereof) and petroleum products, natural gas liquids, asbestos and asbestos containing materials, polychlorinated biphenyls, per- and polyfluoroalkyl substances, naturally occurring radioactive materials, brine, and drilling mud, regulated by or for which standards of conduct or liability may be imposed under any Environmental Law. “Release” means any spilling, leaking, seepage, pumping, pouring, placing, emitting, emptying, discharging, discarding, abandoning, injecting, escaping, leaching, dumping, disposing, depositing, dispersing, or migrating in, into or through the environment, or in, into, from or through any building or structure;

(xxx) (i) Each employee benefit plan, within the meaning of Section 3(3) of the Employee Retirement Income Security Act of 1974, as amended (“ERISA”), for which the Company or any member of its “Controlled Group” (defined as any entity, whether or not incorporated, that is under common control with the Company within the meaning of Section 4001(a)(14) of ERISA or any entity that would be regarded as a single employer with the Company under Section 414(b),(c),(m) or (o) of the Internal Revenue Code of 1986, as amended (the “Code”)) would have any liability (each, a “Plan”) has been maintained in compliance with its terms and the requirements of any applicable statutes, orders, rules and regulations, including but not limited to ERISA and the Code; (ii) no prohibited transaction, within the meaning of Section 406 of ERISA or Section 4975 of the Code, has occurred with respect to any Plan, excluding transactions effected pursuant to a statutory or administrative exemption; (iii) for each Plan that is subject to the funding rules of Section 412 of the Code or Section 302 of ERISA, no Plan has failed (whether or not waived), or is reasonably expected to fail, to satisfy the minimum funding standards (within the meaning of Section 302 of ERISA or Section 412 of the Code) applicable to such Plan; (iv) no Plan is, or is reasonably expected to be, in “at risk status” (within the meaning of Section 303(i) of ERISA), and no Plan that is a “multiemployer plan” within the meaning of Section 4001(a)(3) of ERISA is in “endangered status” or “critical status” (within the meaning of Sections 304 and 305 of ERISA); (v) the fair market value of the assets of each Plan exceeds the present value of all benefits accrued under such Plan (determined based on those assumptions used to fund such Plan); (vi) no “reportable event” (within the meaning of Section 4043(c) of ERISA and the regulations promulgated thereunder) has occurred or is reasonably expected to occur; (vii) each Plan that is intended to be qualified under Section 401(a) of the Code is so qualified, and, to the knowledge of the Company, nothing has occurred, whether by action or by failure to act, which would cause the loss of such qualification; (viii) neither the Company nor any member of the Controlled Group has incurred, nor reasonably expects to incur, any liability under Title IV of ERISA (other than contributions to a Plan or premiums to the Pension Benefit Guaranty Corporation, in the ordinary course and without default) in respect of a

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Plan (including a “multiemployer plan” within the meaning of Section 4001(a)(3) of ERISA); and (ix) none of the following events has occurred or is reasonably likely to occur: (A) a material increase in the aggregate amount of contributions required to be made to all Plans by the Company or its Controlled Group affiliates in the current fiscal year of the Company and its Controlled Group affiliates compared to the amount of such contributions made in the Company’s and its Controlled Group affiliates’ most recently completed fiscal year; or (B) a material increase in the Company’s and its subsidiaries’ “accumulated post-retirement benefit obligations” (within the meaning of Accounting Standards Codification Topic 715-60) compared to the amount of such obligations in the Company’s and its subsidiaries’ most recently completed fiscal year, except in each case with respect to the events or conditions set forth in (i) through (ix) hereof, as would not, individually or in the aggregate, have a Material Adverse Effect;

(xxxi) The Company and its subsidiaries maintain an effective system of “disclosure controls and procedures” (as defined in Rule 13a-15(e) of the Exchange Act) that complies with the requirements of the Exchange Act and that has been designed to ensure that information required to be disclosed by the Company in reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Commission’s rules and forms, including controls and procedures designed to ensure that such information is accumulated and communicated to the Company’s management as appropriate to allow timely decisions regarding required disclosure. The Company and its subsidiaries have carried out evaluations of the effectiveness of their disclosure controls and procedures as required by Rule 13a-15 of the Exchange Act;

(xxxii) The Company and its subsidiaries maintain systems of “internal control over financial reporting” (as defined in Rule 13a-15(f) of the Exchange Act) that comply with the applicable requirements of the Exchange Act and have been designed by, or under the supervision of, their respective principal executive officers and principal financial officers or persons performing similar functions, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP; provided that no such representation is made with respect to ESTE and its subsidiaries, which was excluded from management’s assessment and conclusion on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2023. Other than with respect to ESTE and its subsidiaries, the Company’s recently acquired business, the Company and its subsidiaries maintain internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences; and (v) interactive data in eXtensible Business Reporting Language included or incorporated by reference in each of the Pricing Disclosure Package, any Base Prospectus and the Prospectus fairly presents the information called for in all material respects and is prepared in accordance with the Commission’s rules and guidelines applicable thereto. Management’s assessment and conclusion on the effectiveness of the Company’s internal control over financial reporting as of December 31, 2023 excludes an assessment of the internal control over financial reporting of Earthstone, which was acquired by the Company as of November 1, 2023, and this exclusion for acquired businesses is permitted by the Commission but not beyond one year

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from the date of acquisition. Except as described or incorporated by reference in each of the Pricing Disclosure Package and Prospectus, if any, there are no material weaknesses in the Company’s internal controls. If any exists or has otherwise occurred, the Company’s auditors and the Audit Committee of the Board of Directors of the Company have been advised of: (i) all significant deficiencies and material weaknesses, if any, in the design or operation of internal controls over financial reporting which have adversely affected or are reasonably likely to adversely affect the Company’s ability to record, process, summarize and report financial information and (ii) any fraud, whether or not material, that involves management or other employees who have a significant role in the Company’s internal controls over financial reporting;

(xxxiii) The Company and its subsidiaries have insurance covering their respective properties, operations, personnel and businesses, including business interruption insurance, which insurance is in amounts and insures against such losses and risks as the Company reasonably believes are adequate to protect the Company and its subsidiaries and their respective businesses; and neither the Company nor any of its subsidiaries has (i) received notice from any insurer or agent of such insurer that capital improvements or other material expenditures are required or necessary to be made in order to continue such insurance or (ii) any reason to believe that it will not be able to renew its existing insurance coverage as and when such coverage expires or to obtain substantially similar coverage at reasonable cost from substantially similar insurers as may be necessary to continue its business;

(xxxiv) Neither the Company nor any of its subsidiaries, directors or officers nor, to the knowledge of the Company, any employee, agent, affiliate or other person associated with or acting on behalf of the Company or any of its subsidiaries has (i) used any corporate funds for any unlawful contribution, gift, entertainment or other unlawful expense relating to political activity; (ii) made or taken an act in furtherance of an offer, promise or authorization of any direct or indirect unlawful payment or benefit to any foreign or domestic government official or employee, including of any government-owned or controlled entity or of a public international organization, or any person acting in an official capacity for or on behalf of any of the foregoing, or any political party or party official or candidate for political office; (iii) violated or is in violation of any provision of the Foreign Corrupt Practices Act of 1977, as amended, or any applicable law or regulation implementing the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions, or committed an offence under the Bribery Act 2010 of the United Kingdom or any other applicable anti-bribery or anti-corruption law; or (iv) made, offered, agreed, requested or taken an act in furtherance of any unlawful bribe or other unlawful benefit, including, without limitation, any rebate, payoff, influence payment, kickback or other unlawful or improper payment or benefit. The Company and its subsidiaries have instituted, maintain and enforce policies and procedures designed to promote and ensure compliance with all applicable anti-bribery and anti-corruption laws;

(xxxv) The operations of the Company and its subsidiaries are and have been conducted at all times in compliance with applicable financial recordkeeping and reporting requirements, including those of the Currency and Foreign Transactions Reporting Act of 1970, as amended, the applicable money laundering statutes of all jurisdictions where the Company and its subsidiaries conduct business, the rules and regulations thereunder and any related or similar rules, regulations or guidelines, issued, administered or enforced by any governmental agency (collectively, the “Anti-Money Laundering Laws”), and no action, suit or proceeding by or before any court or governmental agency, authority or body or any arbitrator involving the Company or any of its subsidiaries with respect to the Anti-Money Laundering Laws is pending or, to the knowledge of the Company, threatened;

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(xxxvi) Neither the Company nor any of its subsidiaries, directors, officers or employees, nor, to the knowledge of the Company, any agent, affiliate or other person associated with or acting on behalf of the Company or any of its subsidiaries is currently the subject or the target of any sanctions administered or enforced by the U.S. government (including, without limitation, the Office of Foreign Assets Control of the U.S. Department of the Treasury (“OFAC”) or the U.S. Department of State and including, without limitation, the designation as a “specially designated national” or “blocked person”), the United Nations Security Council (“UNSC”), the European Union, His Majesty’s Treasury (“HMT”) or other relevant sanctions authority (collectively, “Sanctions”), nor is the Company or any of its subsidiaries located, organized or resident in a country or territory that is the subject or target of Sanctions, including, without limitation, the Crimea Region of Ukraine, the so-called Donetsk People’s Republic, the so-called Luhansk People’s Republic, Cuba, Iran, North Korea and Syria (each, a “Sanctioned Country”). For the past nine years, the Company and its subsidiaries have not knowingly engaged in and are not now knowingly engaged in any dealings or transactions with any person or entity that at the time of the dealing or transaction is or was the subject or the target of Sanctions or with any Sanctioned Country;

(xxxvii) The Company will not receive any of the proceeds from the sale of the Shares hereunder;

(xxxviii) None of the Company or any of its subsidiaries is a party to any contract, agreement or understanding with any person (other than this Agreement) that would give rise to a valid claim against the Company or any of its subsidiaries or any Underwriter for a brokerage commission, finder’s fee or like payment in connection with the offering and sale of the Shares;

(xxxix) Except as disclosed in the Pricing Disclosure Package and the Prospectus, no person has the right to require the Company or any of its subsidiaries, as a result of or in connection with the transactions contemplated by this Agreement, to file a registration statement under the Securities Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to a Registration Statement or in any securities being offered or sold pursuant to any other registration statement filed by the Company under the Securities Act (collectively, “registration rights”), except for such persons who have elected not to exercise such registration rights or whose rights have been waived;

(xl) The Company has not taken, directly or indirectly, any action designed to or that could reasonably be expected to cause or result in any stabilization or manipulation of the price of the Shares;

(xli) No forward-looking statement (within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act) included or incorporated by reference in the Pricing Disclosure Package and the Prospectus has been made or reaffirmed without a reasonable basis or has been disclosed other than in good faith;

(xlii) Nothing has come to the attention of the Company that has caused the Company to believe that the statistical and market-related data included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus is not based on or derived from sources that are reliable and accurate in all material respects;

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(xliii) Netherland, Sewell & Associates, Inc. (“NSAI”), who have prepared certain reserve information of the Company and its subsidiaries, have represented to the Company that they are independent petroleum engineers with respect to the Company and its subsidiaries for the periods set forth in the Pricing Disclosure Package and the Prospectus;

(xliv) The oil and gas reserve estimates of the Company included or incorporated by reference in each of the Pricing Disclosure Package and the Prospectus are derived from a report that has been prepared by NSAI as set forth and to the extent indicated therein, and have been prepared in accordance with Commission guidelines in all material respects, and the Company has no reason to believe that such estimates do not fairly reflect, in all material respects, the oil and gas reserves of the Company as of the date indicated therein. Other than production of the reserves in the ordinary course of business, intervening product price fluctuations, fluctuations in demand for such products, adverse weather conditions, unavailability or increased costs of rigs, services, supplies or personnel, the timing of third party operations and other facts, in each case in the ordinary course of business, and as described in each of the Pricing Disclosure Package and the Prospectus, the Company is not aware of any facts or circumstances that would result in a Material Adverse Effect in the reserves or the present value of future net cash flows therefrom as described in each of the Pricing Disclosure Package and the Prospectus;

(xlv) The Company and its subsidiaries’ information technology assets and equipment, computers, systems, networks, hardware, software, websites, applications, and databases (collectively, “IT Systems”) are reasonably adequate for, and operate and perform in all material respects as required in connection with the operation of the business of the Company and its subsidiaries as currently conducted, free and clear of all known material bugs, errors, defects, Trojan horses, time bombs, malware and other corruptants. The Company and its subsidiaries have implemented and maintained commercially reasonable controls, policies, procedures, and safeguards designed to maintain and protect their material confidential information and the integrity and security of all IT Systems and data (including all personal, personally identifiable, sensitive, confidential or regulated data (“Personal Data”)), if any, used in connection with their businesses, and there have been no known breaches, violations, outages or unauthorized uses of or accesses to same, except for those that have been remedied without material cost or liability or the duty to notify any other person, nor are any such incidents under internal review or investigations relating to the same. The Company and its subsidiaries are presently in material compliance with all applicable laws or statutes and all judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority, internal policies and contractual obligations relating to the privacy and security of IT Systems and Personal Data, if any, and to the protection of such IT Systems and Personal Data, if any, from unauthorized use, access, misappropriation or modification except, in each case, as would not reasonably be expected to have a Material Adverse Effect;

(xlvi) The Company and its subsidiaries have such consents, easements, rights-of-way or licenses from any person (“rights-of-way”) as are necessary to enable the Company and its subsidiaries to conduct their respective businesses in the manner described in the Pricing Disclosure Package and the Prospectus, except for such rights-of-way the failure of which to obtain would not, individually or in the aggregate, have a Material Adverse Effect, subject to such qualifications, reservations and encumbrances as may be set forth in the Pricing Disclosure Package and the Prospectus;

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(xlvii) The statements made in the Pricing Disclosure Package and the Prospectus, insofar as they purport to constitute summaries of the terms of the contracts and other documents described, constitute accurate summaries of the terms of such contracts and documents in all material respects. None of the Company or its subsidiaries have been notified that any other party to any such contract or other document has any intention not to render full performance as contemplated by the terms thereof;

(xlviii) The Company is in material compliance with all applicable provisions of the Sarbanes-Oxley Act of 2002, as amended, and the rules and regulations promulgated in connection therewith, including Section 402 thereof related to loans and Sections 302 and 906 thereof related to certifications; and

(xlix) At the time of filing the Initial Registration Statement, and as of the date hereof, the Company was not and is not an “ineligible issuer,” and the Company was and is a “well-known seasoned issuer” as defined in Rule 405 under the Securities Act.

(b) Each of the Selling Stockholders severally represents and warrants to, and agrees with, each of the Underwriters and the Company that:

(i) At the Time of Delivery, such Selling Stockholder has full right, power and authority to enter into this Agreement and to sell, assign, transfer and deliver the Shares to be sold by such Selling Stockholder hereunder;

(ii) Other than such Selling Stockholder that is a natural person, such Selling Stockholder has been duly organized and is validly existing and in good standing under the laws of its respective jurisdictions of organization;

(iii) The sale of the Shares to be sold by such Selling Stockholder hereunder and the compliance by such Selling Stockholder with this Agreement and the consummation of the transactions herein contemplated will not result in a breach or violation of any of the terms or provisions of, or constitute a default under, any statute, indenture, mortgage, deed of trust, loan agreement, lease or other agreement or instrument to which such Selling Stockholder is a party or by which such Selling Stockholder is bound or to which any of the property or assets of such Selling Stockholder is subject, nor will such action result in any violation of the provisions of the charter or bylaws (or similar organizational documents) of such Selling Stockholder that is not a natural person or any statute or any judgment, order, rule or regulation of any court or governmental agency or body having jurisdiction over such Selling Stockholder or any property or assets of such Selling Stockholder, except, in each case, for any breach or violation that would not, individually or in the aggregate, materially impair such Selling Stockholder’s ability to consummate the transactions contemplated by this Agreement; and no consent, approval, authorization, order, registration or qualification of or with any such court or governmental body or agency is required for the performance by such Selling Stockholder of its obligations under this Agreement and the consummation by such Selling Stockholder of the transactions contemplated by this Agreement in connection with the Shares to be sold by such Selling Stockholder hereunder, except (A) such as have been or, prior to the Time of Delivery will be, obtained or made, (B) the registration under the

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Securities Act of the Shares and such consents, approvals, authorizations, orders, registrations or qualifications as may be required under federal or state securities or Blue Sky laws and the approval by the Financial Industry Regulatory Authority (“FINRA”) of the underwriting terms and arrangements in connection with the purchase and distribution of the Shares by the Underwriters and (C) for such that, if not obtained, have not or would not, in the aggregate, reasonably be expected to have a material adverse effect on the ability of such Selling Stockholder to consummate the transactions contemplated by this Agreement;

(iv) Such Selling Stockholder has (other than in the case of Redemption Shares), and immediately prior to the Time of Delivery, such Selling Stockholder will have, good and valid title to, or a valid “security entitlement” within the meaning of Section 8-501 of the New York Uniform Commercial Code in respect of, the Shares to be sold by such Selling Stockholder hereunder at such Time of Delivery, free and clear of all liens, encumbrances or defects; and, upon delivery of such Shares and payment therefor pursuant hereto at the Time of Delivery, good and valid title to such Shares or a valid “security entitlement” in respect of such Shares, free and clear of all liens, encumbrances or defects, will pass to the several Underwriters;

(v) On or prior to the date hereof, such Selling Stockholder has executed and delivered to the Underwriters an agreement substantially in the form of Annex II hereto (collectively, the “Lock-Up Agreements”);

(vi) Such Selling Stockholder has not taken and will not take, directly or indirectly, any action that is designed to or that has constituted or could reasonably be expected to cause or result in stabilization or manipulation of the price of any security of the Company to facilitate the sale or resale of the Shares;

(vii) To the extent that any statements or omissions made in the Registration Statement, any Base Prospectus, the Prospectus or any amendment or supplement thereto are made in reliance upon and in conformity with written information furnished to the Company by such Selling Stockholder pursuant to Item 7 of Form S–3 expressly for use therein (it being understood and agreed that the only such information furnished in writing to the Company by such Selling Stockholder specifically for use in the Prospectus consists of (A) the legal name, address and number of shares of Stock owned by such Selling Stockholder and (B) the other information with respect to such Selling Stockholder (excluding percentages) which appear in the table (and corresponding footnotes) under the caption “Selling Stockholders” (with respect to such Selling Stockholder, the “Selling Stockholder Information”)), the Registration Statement and any Base Prospectus did, and the Prospectus and any further amendments or supplements to the Registration Statement and the Prospectus will, when they become effective or are filed with the Commission, as the case may be, conform in all material respects to the requirements of the Securities Act and the rules and regulations of the Commission thereunder and not include an untrue statement of a material fact or omit to state a material fact necessary in order to make the statements, in the light of the circumstances under which they were made, not misleading;

(viii) Such Selling Stockholder is not prompted by any material non-public information concerning the Company or any of its subsidiaries that is not disclosed in the Pricing Prospectus to sell its Shares pursuant to this Agreement;

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(ix) Such Selling Stockholder is not (i) an employee benefit plan subject to Title I of ERISA, (ii) a plan or account subject to Section 4975 of the Internal Revenue Code of 1986, as amended (the “Code”) or (iii) an entity deemed to hold “plan assets” of any such plan or account under Section 3(42) of ERISA, 29 C.F.R. 2510.3-101, or otherwise; and

(x) Neither such Selling Stockholder nor any of its subsidiaries, directors, officers or employees, nor, to the knowledge of such Selling Stockholder, any agent, affiliate or other person associated with or acting on behalf of such Selling Stockholder or any of its subsidiaries is currently the subject or target of any Sanctions, nor is such Selling Stockholder, nor any of its subsidiaries, located, organized or a resident in a Sanctioned Country; and such Selling Stockholder will not directly, or to the Selling Stockholder’s knowledge, indirectly use the proceeds of the offering of the Shares hereunder, or lend, contribute or otherwise make available such proceeds to any subsidiary, joint venture partner or other person or entity (i) to fund or facilitate any activities of or business with any person that, at the time of such funding or facilitation, is the subject or target of Sanctions, (ii) to fund or facilitate any activities of or business in any Sanctioned Country or (iii) in any other manner that will result in a violation by any person (including any person participating in the transaction, whether as underwriter, advisor, investor or otherwise) of Sanctions. For the past five years, such Selling Stockholder and its subsidiaries have not knowingly engaged in, are not now knowingly engaged in any dealings or transactions with any person that at the time of the dealing or transaction is or was the subject or target of Sanctions or with any Sanctioned Country.

2. Subject to the terms and conditions herein set forth, each of the Selling Stockholders agrees, severally and not jointly, to sell to each of the Underwriters, and each of the Underwriters agrees, severally and not jointly, to purchase from each of the Selling Stockholders, at a purchase price per share of $16.42, the number of Shares (to be adjusted by the Representative so as to eliminate fractional shares) determined by multiplying the aggregate number of Shares to be sold by each of the Selling Stockholders as set forth opposite their respective names in Schedule II hereto by a fraction, the numerator of which is the aggregate number of Shares to be purchased by such Underwriter as set forth opposite the name of such Underwriter in Schedule I hereto and the denominator of which is the aggregate number of Shares to be purchased by all of the Underwriters from all of the Selling Stockholders hereunder.

3. Upon the authorization by the Representative of the release of the Shares, the several Underwriters propose to offer the Shares for sale upon the terms and conditions set forth in the Prospectus.

4. (a) The Shares to be purchased by each Underwriter hereunder, in definitive or book-entry form, and in such authorized denominations and registered in such names as the Representative may request upon at least thirty-six hours’ prior notice to the Company and the Selling Stockholders, shall be delivered by or on behalf of the Selling Stockholders to the Representative, through the facilities of the Depository Trust Company (“DTC”), for the account of such Underwriter, against payment by or on behalf of such Underwriter of the purchase price therefor by wire transfer of Federal (same-day) funds to the paying agent or the accounts designated by the Selling Stockholders no later than 10:30 a.m., New York Time, on May 15, 2024. The Company and the Selling Stockholders will cause the certificates, if any, representing the Shares to be made available for checking and packaging at least twenty-four hours prior to the Time of Delivery with respect thereto at the office of DTC or its designated custodian (the “Designated Office”). The time and date of such delivery and payment shall be 9:30 a.m., New York time, on May 15, 2024, or such other time and date as the Representative and the Company may agree upon in writing. Such time and date for delivery of the Shares is herein called the “Time of Delivery.”

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(b) The documents to be delivered at the Time of Delivery by or on behalf of the parties hereto pursuant to Section 8 hereof, including the cross receipt for the Shares and any additional documents requested by the Underwriters pursuant to Section 8(n) hereof will be delivered at the offices of Latham & Watkins LLP, Houston, Texas 77002 (the “Closing Location”), and the Shares will be delivered at the Designated Office, all at such Time of Delivery. For the purposes of this Section 4, “New York Business Day” shall mean each Monday, Tuesday, Wednesday, Thursday and Friday which is not a day on which banking institutions in New York are generally authorized or obligated by law or executive order to close.

5. The Company agrees with each of the Underwriters:

(a) To prepare the Prospectus in a form approved by you (such approval not to unreasonably be withheld) and to file such Prospectus with the Commission pursuant to Rule 424(b) under the Securities Act not later than the Commission’s close of business on the second business day following the execution and delivery of this Agreement; to make no further amendment or any supplement to the Registration Statement or the Prospectus prior to the Time of Delivery which shall be disapproved by you promptly after reasonable notice thereof; to advise you, promptly after it receives notice thereof, of the time when any amendment to the Registration Statement has been filed or becomes effective or any amendment or supplement to the Prospectus has been filed and to furnish you with copies thereof; to file promptly all material required to be filed by the Company with the Commission pursuant to Rule 433(d) under the Securities Act; to file promptly all reports and any definitive proxy or information statements required to be filed by the Company with the Commission pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act subsequent to the date of the Prospectus and for so long as the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Securities Act) is required in connection with the offering or sale of the Shares; to advise you, promptly after it receives notice thereof, of the issuance by the Commission of any stop order or of any order preventing or suspending the use of any Base Prospectus or other prospectus in respect of the Shares, of the suspension of the qualification of the Shares for offering or sale in any jurisdiction, of the initiation or threatening of any proceeding for any such purpose, or of any request by the Commission for the amending or supplementing of the Registration Statement or the Prospectus or for additional information; and, in the event of the issuance of any stop order or of any order preventing or suspending the use of any Base Prospectus or other prospectus or suspending any such qualification, to promptly use commercially reasonable efforts to obtain the withdrawal of such order;

(b) Promptly from time to time to take such action as you may reasonably request to qualify the Shares for offering and sale under the securities laws of such jurisdictions as you may reasonably request and to comply with such laws so as to permit the continuance of sales and dealings therein in such jurisdictions for as long as may be necessary to complete the distribution of the Shares, provided that in connection therewith the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction;

(c) Prior to 10:00 a.m., New York City time, on the New York Business Day next succeeding the date one day after this Agreement and from time to time, to furnish the Underwriters with written and electronic copies of the Prospectus in New York City in such quantities as you may reasonably request, and, if the delivery of a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Securities Act) is required at any time prior to the

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expiration of nine months after the time of issue of the Prospectus in connection with the offering or sale of the Shares and if at such time any event shall have occurred as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made when such Prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Securities Act) is delivered, not misleading, or, if for any other reason it shall be necessary during such same period to amend or supplement the Prospectus or to file under the Exchange Act any document incorporated by reference therein in order to comply with the Securities Act, to notify you and upon your request to file such document and to prepare and furnish without charge to each Underwriter and to any dealer in securities as many written and electronic copies as you may from time to time reasonably request of an amended Prospectus or a supplement to the Prospectus which will correct such statement or omission or effect such compliance; and in case any Underwriter is required to deliver a prospectus (or in lieu thereof, the notice referred to in Rule 173(a) under the Securities Act) in connection with sales of any of the Shares at any time nine months or more after the time of issue of the Prospectus, upon your request but at the expense of such Underwriter, to prepare and deliver to such Underwriter as many written and electronic copies as you may request of an amended or supplemented Prospectus complying with Section 10(a)(3) of the Securities Act;

(d) To make generally available to its securityholders as soon as practicable, but in any event not later than sixteen months after the effective date of the Registration Statement (as defined in Rule 158(c) under the Securities Act), an earnings statement of the Company and its subsidiaries (which need not be audited) complying with Section 11(a) of the Securities Act and the rules and regulations of the Commission thereunder (including, at the option of the Company, Rule 158);

(e) During the period beginning from the date hereof and continuing to and including the date 45 days after the date of the Prospectus or such earlier date as the Representative may consent to in writing (the “Lock-Up Period”), not to (i) offer, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, pledge, grant any option, right or warrant to purchase, make any short sale, lend or otherwise transfer or dispose of, directly or indirectly, or file with or confidentially submit to the Commission a registration statement under the Securities Act relating to its Stock, the Opco Units, the Class C Common Stock or any securities of the Company that are substantially similar to the foregoing or any options or warrants to purchase shares of Stock, OpCo Units or Class C Common Stock or any securities that are convertible into or exercisable or exchangeable for, or that represent the right to receive, Stock, Opco Units or Class C Common Stock or substantially similar securities (the “Lock-Up Securities”), or publicly disclose the intention to undertake any of the foregoing or (ii) enter into any swap or other agreement that transfers, in whole or in part, any of the economic consequences of ownership of the Lock-Up Securities, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Lock-Up Securities, in cash or otherwise, without the prior written consent of the Representative. Furthermore, the foregoing restrictions with respect to the Lock-Up Securities and the Lock-Up Period shall not apply to (i) issuances of Lock-Up Securities pursuant to the conversion or exchange of convertible or exchangeable securities or the exercise of warrants or options, in each case outstanding on the date hereof and, with respect to the parties subject to the Lock-Up Agreements, as described in the Pricing Disclosure Package and the Prospectus (including, for avoidance of doubt, the issuance of the Redemption Shares), (ii) on or after May 22, 2024, the filing of a universal “shelf” registration statement on Form S-3 or a successor form thereto in replacement of that certain universal “shelf” registration statement on Form S-3 (File No. 333-254300), which became automatically effective upon filing with the Commission on March 15, 2021 and expired on March 15, 2024, relating to

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the issuance of Lock-Up Securities (so long as no Lock-Up Securities are offered or issued prior to the Lock-Up Period), (iii) the filing of a registration statement on Form S-8 relating to securities granted or to be granted pursuant to the terms of a plan in effect as of and described in the Pricing Disclosure Package and the Prospectus, (iv) grants of employee stock options pursuant to the terms of a plan in effect on the date hereof or (v) issuances of Lock-Up Securities issued as consideration for the acquisition of equity interests or assets of any person, or the acquiring by the Company by any other manner of any business, properties, assets, or persons, in one transaction or a series of related transactions or the filing of a registration statement related to such Lock-Up Securities; provided that (x) no more than an aggregate of 10% of the number of shares of the Company’s Class A Common Stock outstanding as of the date hereof are issued as consideration in connection with all such acquisitions and (y) each recipient of such Lock-Up Securities agrees in writing to be bound to the terms of this Section 5(e) for the remaining term of the Lock-Up Period; provided, however, that the recipients of Lock-Up Securities in connection with that certain bolt-on acquisition involving OpCo and the Company, entered into during April 2024 and scheduled to close during May 2024 (the “May 2024 Acquisition”) and the Company, as it relates to up to $100 million of such Lock-Up Securities, shall not be bound by the terms and restrictions of this Section 5(e) and may freely transfer any Lock-Up Securities acquired by such recipients in connection with the May 2024 Acquisition, subject to applicable law;

(f) During a period of three years from the effective date of the Registration Statement, so long as the Company is subject to the reporting requirements of either Section 13 or Section 15(d) of the Exchange Act, to furnish to you copies of all reports or other communications (financial or other) furnished to holders of shares, and to deliver to you (i) as soon as they are available, copies of any reports and financial statements furnished to or filed with the Commission or any national securities exchange on which any class of securities of the Company is listed; and (ii) such additional information concerning the business and financial condition of the Company as you may from time to time reasonably request (such financial statements to be on a consolidated basis to the extent the accounts of the Company and its subsidiaries are consolidated in reports furnished to its stockholders generally or to the Commission); provided that the Company will be deemed to have furnished such reports, financial information and such other reports or information to the Representative and satisfied its obligations hereunder to the extent they are filed with the Commission on its Electronic Data Gathering, Analysis and Retrieval system (or any successor system); and

(g) Upon request of any Underwriter, to furnish, or cause to be furnished, to such Underwriter an electronic version of the Company’s trademarks, service marks and corporate logo for use on the website, if any, operated by such Underwriter for the purpose of facilitating the online offering of the Shares (the “License”); provided, however, that the License shall be used solely for the purpose described above, is granted without any fee and may not be assigned, transferred.

6. (a) The Company represents and agrees that, without the prior consent of the Representative, it has not made and will not make any offer relating to the Shares that would constitute a “free writing prospectus” as defined in Rule 405 under the Securities Act; each Selling Stockholder represents and agrees that, without the prior consent of the Company and the Representative, it has not made and will not make any offer relating to the Shares that would constitute a free writing prospectus; and each Underwriter represents and agrees that, without the prior consent of the Company and the Representative, it has not made and will not make any offer relating to the Shares that would constitute a free writing prospectus required to be filed with the Commission; any such free writing prospectus the use of which has been consented to by the Company and the Representative is listed on Schedule III(a) hereto;

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(b) The Company has complied and will comply with the requirements of Rule 433 under the Securities Act applicable to any Issuer Free Writing Prospectus, including timely filing with the Commission or retention where required and legending; and

(c) The Company agrees that if at any time following issuance of an Issuer Free Writing Prospectus any event occurred or occurs as a result of which such Issuer Free Writing Prospectus would conflict with the information in the Registration Statement, the Pricing Prospectus or the Prospectus or would include an untrue statement of a material fact or omit to state any material fact necessary in order to make the statements therein, in the light of the circumstances under which it is made, not misleading, the Company will give prompt notice thereof to the Representative and, if requested by the Representative, will prepare and furnish without charge to each Underwriter an Issuer Free Writing Prospectus or other document which will correct such conflict, statement or omission; provided, however, that this representation and warranty shall not apply to any statements or omissions in an Issuer Free Writing Prospectus made in reliance upon and in conformity with the Underwriter Information.

7. The Company and each of the Selling Stockholders covenant and agree with one another and with the several Underwriters that (a) the Company will pay or cause to be paid (i) the reasonable and documented fees, disbursements and expenses of the Company’s counsel and accountants in connection with the registration of the Shares under the Securities Act and all other expenses in connection with the preparation, printing, reproduction and filing of the Registration Statement, any Base Prospectus, any Preliminary Prospectus, any Issuer Free Writing Prospectus and the Prospectus and amendments and supplements thereto and the mailing and delivering of copies thereof to the Underwriters and dealers; (ii) the fees and expenses of one legal counsel representing the Selling Stockholders; (iii) the cost of printing or producing any agreement among Underwriters, this Agreement, the Blue Sky Memorandum, closing documents (including any compilations thereof) and any other documents in connection with the offering, purchase, sale and delivery of the Shares; (iv) all expenses in connection with the qualification of the Shares for offering and sale under state securities laws as provided in Section 5(b) hereof, including the reasonable fees and disbursements of counsel for the Underwriters in connection with such qualification and in connection with the Blue Sky survey; (v) all fees and expenses in connection with listing the Shares on the Exchange; (vi) the filing fees incident to, and up to an aggregate $10,000 of the fees and disbursements of counsel for the Underwriters in connection with, any required review by the FINRA of the terms of the sale of the Shares; (vii) the cost of preparing stock certificates; (viii) the cost and charges of any transfer agent or registrar; and (ix) all other costs and expenses incident to the performance of its obligations hereunder which are not otherwise specifically provided for in this Section; and (b) such Selling Stockholder will pay or cause to be paid all costs and expenses incident to the performance of such Selling Stockholder’s obligations hereunder which are not otherwise specifically provided for in this Section 7, including all expenses and taxes (but, in no event, income taxes imposed on an Underwriter) incident to the sale and delivery of the Shares to be sold by such Selling Stockholder to the Underwriters hereunder. It is understood, however, that the Company shall bear, and the Selling Stockholders shall not be required to pay or to reimburse the Company for, the cost of any other matters not directly relating to the sale and purchase of the Shares pursuant to this Agreement, and that, except as provided in this Section 7, and Sections 9 and 12 hereof, the Underwriters will pay all of their own costs and expenses, including the fees of their counsel, stock transfer taxes on resale of any of the Shares by them, and any advertising expenses connected with any offers they may make.

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8. The obligations of the Underwriters hereunder, as to the Shares to be delivered at the Time of Delivery, shall be subject, in their discretion, to the condition that all representations and warranties and other statements of the Company and the Selling Stockholders herein are, at and as of the Applicable Time and such Time of Delivery, true and correct, the condition that the Company and the Selling Stockholders shall have performed all of its and their obligations hereunder theretofore to be performed, and the following additional conditions:

(a) The Prospectus shall have been filed with the Commission pursuant to Rule 424(b) under the Securities Act within the applicable time period prescribed for such filing by the rules and regulations under the Securities Act and in accordance with Section 5(a) hereof; all material required to be filed by the Company pursuant to Rule 433(d) under the Securities Act shall have been filed with the Commission within the applicable time period prescribed for such filing by Rule 433; no stop order suspending the effectiveness of the Registration Statement or any part thereof shall have been issued and no proceeding for that purpose shall have been initiated or threatened by the Commission; no stop order suspending or preventing the use of the Pricing Prospectus, Prospectus or any Issuer Free Writing Prospectus shall have been initiated or threatened by the Commission; and all requests for additional information on the part of the Commission shall have been complied with to your reasonable satisfaction;

(b) Latham & Watkins LLP, counsel for the Underwriters, shall have furnished to you such written opinion or opinions, dated such Time of Delivery, in form and substance reasonably satisfactory to you, and such counsel shall have received such papers and information as they may reasonably request to enable them to pass upon such matters;

(c) Vinson & Elkins L.L.P., counsel for the Company, shall have furnished to you their written opinion (substantially in the form attached as Annex I(a) hereto), dated such Time of Delivery, in form and substance reasonably satisfactory to you;

(d) Vinson & Elkins L.L.P., counsel for certain of the Selling Stockholders, shall have furnished to you their written opinion with respect to such Selling Stockholders (substantially in the form attached as Annex I(b) hereto), dated such Time of Delivery, in form and substance reasonably satisfactory to you;

(e) In order to document the Underwriters’ compliance with the U.S. tax reporting and withholding provisions with respect to the transactions herein contemplated, each Selling Stockholder will deliver to you prior to or at the Time of Delivery a properly completed and executed United States Treasury Department Form W-9;

(f) On the date hereof and also at the Time of Delivery, KPMG LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance reasonably satisfactory to you with respect to the Company;

(g) On the date hereof and also at the Time of Delivery, Moss Adams LLP shall have furnished to you a letter or letters, dated the respective dates of delivery thereof, in form and substance reasonably satisfactory to you with respect to ESTE and Novo;

(h) On the date hereof and also at the Time of Delivery, NSAI shall have furnished to the Representative, at the request of the Company, letters, dated the respective dates of delivery thereof and addressed to the Representative (i) confirming, as of such date, its estimates contained in the reserve reports, as of its date, with respect to: (A) the estimated quantities of the Company’s proved net reserves, (B) the future net revenues from those reserves, (C) their present value as set forth in the Pricing Prospectus and the Prospectus and (D) such related matters as the Representative shall reasonably request and (ii) in such letter furnished by NSAI, confirming that it is an independent petroleum engineering firm.

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(i) (i) Neither the Company nor any of its subsidiaries shall have sustained since the date of the latest audited financial statements included or incorporated by reference in the Pricing Prospectus any loss or interference with its business from fire, explosion, flood or other calamity, whether or not covered by insurance, or from any labor dispute or court or governmental action, order or decree, otherwise than as set forth or contemplated in the Pricing Prospectus, and (ii) since the respective dates as of which information is given in the Pricing Prospectus there shall not have been any material reduction in the capital stock or material increase in the long-term debt of the Company or any of its subsidiaries or any change or effect, or any development involving a prospective change or effect, in or affecting (x) the business, properties, general affairs, management, financial position, stockholders’ equity or results of operations of the Company and its subsidiaries, taken as a whole, except as set forth or contemplated in the Pricing Prospectus and the Prospectus, or (y) the ability of the Company to perform its obligations under this Agreement or to consummate the transactions contemplated in the Pricing Prospectus and the Prospectus, the effect of which, in any such case described in clause (i) or (ii), is in your judgment so material and adverse as to make it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at such Time of Delivery on the terms and in the manner contemplated in the Pricing Prospectus and the Prospectus;

(j) On or after the Applicable Time (i) no downgrading shall have occurred in the rating accorded the Company’s or its subsidiaries’ debt securities or preferred stock (to the extent applicable) by any “nationally recognized statistical rating organization,” as defined in Section 3(a)(62) of the Exchange Act, and (ii) no such organization shall have publicly announced that it has under surveillance or review, other than an announcement with positive implications of a possible upgrading and no implication of a possible negative downgrading, of such rating, of any of the Company’s or its subsidiaries’ debt securities or preferred stock;

(k) On or after the Applicable Time there shall not have occurred any of the following: (i) a suspension or material limitation in trading in securities generally on the Exchange; (ii) a suspension or material limitation in trading in the Company’s securities on the Exchange; (iii) a general moratorium on commercial banking activities declared by either U.S. Federal or New York State authorities or a material disruption in commercial banking or securities settlement or clearance services in the United States; (iv) the outbreak or escalation of hostilities involving the United States or the declaration by the United States of a national emergency or war or (v) the occurrence of any other calamity or crisis or any change in financial, political or economic conditions in the United States or elsewhere, if the effect of any such event specified in clause (iv) or (v) in your judgment makes it impracticable or inadvisable to proceed with the public offering or the delivery of the Shares being delivered at such Time of Delivery on the terms and in the manner contemplated in the Pricing Prospectus and the Prospectus;

(l) The Company shall have obtained and delivered to the Underwriters executed copies of an agreement from each stockholder of the Company listed on Schedule IV hereto, substantially to the effect set forth in Annex II hereto in form and substance reasonably satisfactory to you;

(m) The Company shall have complied with the provisions of Section 5(c) hereof with respect to the furnishing of prospectuses on the New York Business Day next succeeding the date one day after this Agreement;

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(n) The Company and the Selling Stockholders shall have furnished or caused to be furnished to you at such Time of Delivery certificates of officers of the Company and of the Selling Stockholders, respectively, reasonably satisfactory to you as to the accuracy of the representations and warranties of the Company and the Selling Stockholders, respectively, herein at and as of such Time of Delivery, as to the performance by the Company and the Selling Stockholders of all of their respective obligations hereunder to be performed at or prior to such Time of Delivery, as to such other matters as you may reasonably request, and the Company shall have furnished or caused to be furnished certificates as to the matters set forth in subsections (a) and (i) of this Section 8;

(o) At the Time of Delivery, the Underwriters shall have received reasonably satisfactory evidence of the good standing of the Company and its subsidiaries in their respective jurisdictions of organization and their good standing in such other jurisdictions as the Representative may reasonably request, in each case in writing or any standard form of telecommunication from the appropriate governmental authorities of such jurisdictions;

(p) No action shall have been taken and no statute, rule, regulation or order shall have been enacted, adopted or issued by and federal, state or foreign governmental or regulatory authority that would, as of the Time of Delivery, prevent the sale and delivery of the Shares; and no injunction or order of any federal, state or foreign court shall have been issued that would, as of the Time of Delivery, prevent the sale and delivery of the Shares; and

(q) On or prior to the Time of Delivery, the Company shall have furnished to the Representative such further certificates and documents as the Representative may reasonably request.

9. (a) The Company will indemnify and hold harmless each Underwriter, each Selling Stockholder and each of its directors and officers against any losses, claims, damages or liabilities, joint or several, to which such Underwriter, Selling Stockholder, director or officer may become subject, under the Securities Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, contained in any part thereof at any time or upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, and in the case of any Base Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus, any “roadshow” as defined in Rule 433(h) under the Securities Act (a “roadshow”) or any “issuer information” filed or required to be filed pursuant to Rule 433(d) under the Securities Act, included in any part thereof as of any time or upon the omission or the alleged omission of a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Underwriter, each Selling Stockholder and such directors and officers for any legal or other documented expenses reasonably incurred by such Underwriter, Selling Stockholder, director or officer in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that the Company shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, any Base Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, in reliance upon and in conformity with the Underwriter Information or the Selling Stockholder information.

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(b) The Selling Stockholders, severally and not jointly, will indemnify and hold harmless the Company, each of its directors and officers and each Underwriter against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Securities Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Base Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, any Issuer Free Writing Prospectus or any roadshow, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Base Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto or any Issuer Free Writing Prospectus, or any roadshow, in reliance upon and in conformity with the Selling Stockholder Information; and will reimburse the Company, such directors and officers and each Underwriter for any legal or other documented expenses reasonably incurred by them in connection with investigating or defending any such action or claim as such expenses are incurred; provided, however, that such Selling Stockholder shall not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement or omission or alleged omission made in the Registration Statement, any Base Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus or any amendment or supplement thereto or any Issuer Free Writing Prospectus in reliance upon and in conformity with the Underwriter Information. The aggregate liability of each Selling Stockholder under Section 9(b) and Section 9(e) hereof shall be limited to the aggregate net proceeds, after underwriting discounts but before deducting expenses, from the offering of the Shares purchased under the Agreement received by such Selling Stockholder, as set forth in the table on the cover page of the final Prospectus.

(c) Each Underwriter, severally and not jointly, will indemnify and hold harmless the Company, each Selling Stockholder and each of their respective directors and officers against any losses, claims, damages or liabilities to which the Company or such Selling Stockholder may become subject, under the Securities Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon an untrue statement or alleged untrue statement of a material fact contained in the Registration Statement, any Base Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, or any roadshow, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in the Registration Statement, any Base Prospectus, any Preliminary Prospectus, the Pricing Prospectus or the Prospectus, or any amendment or supplement thereto, or any Issuer Free Writing Prospectus, or any roadshow, in reliance upon and in conformity with the Underwriter Information; and will reimburse the Company, each of its directors and officers and each Selling Stockholder for any legal or other documented expenses reasonably incurred by the Company, such director or officer or such Selling Stockholder in connection with investigating or defending any such action or claim as such expenses are incurred. As used in this Agreement with respect to an Underwriter and an applicable document, “Underwriter Information” shall mean the written information furnished to the Company by such Underwriter through the Representative expressly for use therein; it being understood and agreed upon that the only such information furnished by any Underwriter consists of the following information in the Prospectus furnished on behalf of each Underwriter: the concession figure appearing in the third paragraph under the caption “Underwriting” and the information contained in the twelfth paragraph under the caption “Underwriting” regarding stabilizing transactions and short positions.

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(d) Promptly after receipt by an indemnified party under subsection (a), (b) or (c) of this Section 9 of notice of the commencement of any action, such indemnified party shall, if a claim in respect thereof is to be made against the indemnifying party under such subsection, notify the indemnifying party in writing of the commencement thereof; provided that the failure to notify the indemnifying party shall not relieve it from any liability that it may have under the preceding paragraphs of this Section 9 except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than under the preceding paragraphs of this Section 9. In case any such action shall be brought against any indemnified party and it shall notify the indemnifying party of the commencement thereof, the indemnifying party shall be entitled to participate therein and, to the extent that it shall wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and, after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party shall not be liable to such indemnified party under such subsection for any legal expenses of other counsel or any other expenses, in each case subsequently incurred by such indemnified party, in connection with the defense thereof other than reasonable costs of investigation. No indemnifying party shall, without the written consent of the indemnified party, effect the settlement or compromise of, or consent to the entry of any judgment with respect to, any pending or threatened action or claim in respect of which indemnification or contribution may be sought hereunder (whether or not the indemnified party is an actual or potential party to such action or claim) unless such settlement, compromise or judgment (i) includes an unconditional release of the indemnified party from all liability arising out of such action or claim and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act, by or on behalf of any indemnified party.

(e) If the indemnification provided for in this Section 9 is unavailable to or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above in respect of any losses, claims, damages or liabilities (or actions in respect thereof) referred to therein, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of such losses, claims, damages or liabilities (or actions in respect thereof) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other from the offering of the Shares. If, however, the allocation provided by the immediately preceding sentence is not permitted by applicable law, then each indemnifying party shall contribute to such amount paid or payable by such indemnified party in such proportion as is appropriate to reflect not only such relative benefits but also the relative fault of the Company and the Selling Stockholders on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities (or actions in respect thereof), as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Selling Stockholders bear to the total underwriting discounts and commissions received by the Underwriters, in each case as set forth in the table on the cover page of the Prospectus. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to

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state a material fact relates to information supplied by the Company or the Selling Stockholders on the one hand or the Underwriters on the other and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such statement or omission. The Company, each of the Selling Stockholders and the Underwriters agree that it would not be just and equitable if contribution pursuant to this subsection (e) were determined by pro rata allocation (even if the Underwriters were treated as one entity for such purpose) or by any other method of allocation which does not take account of the equitable considerations referred to above in this subsection (e). The amount paid or payable by an indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect thereof) referred to above in this subsection (e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any such action or claim. Notwithstanding the provisions of this subsection (e), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Shares underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (e) to contribute are several in proportion to their respective underwriting obligations and not joint. The Selling Stockholders’ obligations in this subsection (e) to contribute are several in proportion to their respective number of Shares to be sold in the offering and not joint.

(f) The obligations of the Company and the Selling Stockholders under this Section 9 shall be in addition to any liability which the Company and the Selling Stockholders may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of each Underwriter and each person, if any, who controls any Underwriter within the meaning of the Securities Act and each broker-dealer affiliate of any Underwriter; and the obligations of the Underwriters under this Section 9 shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each officer and director of the Company or any Selling Stockholder and to each person, if any, who controls the Company or any Selling Stockholder within the meaning of the Securities Act.

10. (a) If any Underwriter shall default in its obligation to purchase the Shares that it has agreed to purchase hereunder at the Time of Delivery, you may in your discretion arrange for you or another party or other parties to purchase such Shares on the terms contained herein. If within thirty-six hours after such default by any Underwriter you do not arrange for the purchase of such Shares, then the Company and the Selling Stockholders shall be entitled to a further period of thirty-six hours within which to procure another party or other parties satisfactory to you to purchase such Shares on such terms. In the event that, within the respective prescribed periods, you notify the Company and the Selling Stockholders that you have so arranged for the purchase of such Shares, or the Company or a Selling Stockholder notifies you that it has so arranged for the purchase of such Shares, you or the Company or the Selling Stockholders shall have the right to postpone such Time of Delivery for a period of not more than seven days, in order to effect whatever changes may thereby be made necessary in the Registration Statement or the Prospectus, or in any other documents or arrangements, and the Company agrees to file promptly any amendments or supplements to the Registration Statement or the Prospectus which in your opinion may thereby be made necessary. The term “Underwriter” as used in this Agreement shall include any person substituted under this Section with like effect as if such person had originally been a party to this Agreement with respect to such Shares.

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(b) If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you, the Company and the Selling Stockholders as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased does not exceed one-eleventh of the aggregate number of all the Shares to be purchased at such Time of Delivery, then the Selling Stockholders shall have the right to require each non-defaulting Underwriter to purchase the number of Shares which such Underwriter agreed to purchase hereunder at such Time of Delivery and, in addition, to require each non-defaulting Underwriter to purchase its pro rata share (based on the number of Shares which such Underwriter agreed to purchase hereunder) of the Shares of such defaulting Underwriter or Underwriters for which such arrangements have not been made; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

(c) If, after giving effect to any arrangements for the purchase of the Shares of a defaulting Underwriter or Underwriters by you, the Company and the Selling Stockholders as provided in subsection (a) above, the aggregate number of such Shares which remains unpurchased exceeds one-eleventh of the aggregate number of all of the Shares to be purchased at such Time of Delivery, or if the Selling Stockholders shall not exercise the right described in subsection (b) above to require non-defaulting Underwriters to purchase Shares of a defaulting Underwriter or Underwriters, then this Agreement shall thereupon terminate, without liability on the part of any non-defaulting Underwriter, the Company or the Selling Stockholders, except for the expenses to be borne by the Company, the Selling Stockholders and the Underwriters as provided in Section 7 hereof (except for any such expenses of a defaulting Underwriter) and the indemnity and contribution agreements in Section 9 hereof; but nothing herein shall relieve a defaulting Underwriter from liability for its default.

11. The respective indemnities, agreements, rights of contribution, representations, warranties and other statements of the Company, the Selling Stockholders and the several Underwriters, as set forth in this Agreement or made by or on behalf of them, respectively, pursuant to this Agreement, shall remain in full force and effect, regardless of any investigation (or any statement as to the results thereof) made by or on behalf of any Underwriter or any controlling person of any Underwriter, or the Company, or any of the Selling Stockholders, or any officer or director or controlling person of the Company, or any controlling person of any Selling Stockholder, and shall survive delivery of and payment for the Shares.

12. If this Agreement shall be terminated pursuant to Section 10 hereof, neither the Company nor the Selling Stockholders shall then be under any liability to any Underwriter except as provided in Sections 7 and 9 hereof; but, if for any other reason any Shares are not delivered by or on behalf of the Selling Stockholders as provided herein, (a) the Company or (b) if such failure to deliver Shares arises from the breach of a representation, warranty or covenant by any Selling Stockholder, such Selling Stockholder or Stockholders pro rata (based on the number of Shares to be sold by such Selling Stockholder hereunder) will reimburse the Underwriters through you for all out-of-pocket expenses approved in writing by you, including fees and disbursements of counsel, reasonably incurred by the Underwriters in making preparations for the purchase, sale and delivery of the Shares not so delivered, but the Company and the Selling Stockholders shall then be under no further liability to any Underwriter except as provided in Sections 7 and 9 hereof.

13. In all dealings hereunder, the Representative shall act on behalf of each of the Underwriters, and the parties hereto shall be entitled to act and rely upon any statement, request, notice or agreement on behalf of any Underwriter made or given by the Representative.

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In accordance with the requirements of the USA Patriot Act (Title III of Pub. L. 107-56 (signed into law October 26, 2001)), the Underwriters are required to obtain, verify and record information that identifies their respective clients, including the Company and the Selling Stockholders, which information may include the name and address of their respective clients, as well as other information that will allow the Underwriters to properly identify their respective clients.

All statements, requests, notices and agreements hereunder shall be in writing, and if to the Underwriters shall be delivered or sent by mail, telex or facsimile transmission to Goldman Sachs & Co. LLC, 200 West Street, New York, New York 10282, Attention: Registration Department; if to any Selling Stockholder shall be delivered or sent by mail, telex or facsimile transmission to counsel for such Selling Stockholder at its address set forth in Schedule IV hereto; if to the Company shall be delivered or sent by mail, telex or facsimile transmission to the address of the Company set forth on the cover of the Registration Statement, Attention: Secretary; and if to any stockholder that has delivered a lock-up letter described in Section 8(l) hereof shall be delivered or sent by mail to his or her respective address provided in Schedule IV hereto or such other address as such stockholder provides in writing to the Company; provided, however, that any notice to an Underwriter pursuant to Section 9(d) hereof shall be delivered or sent by mail, telex or facsimile transmission to such Underwriter at its address set forth in its Underwriters’ Questionnaire or telex constituting such Questionnaire, which address will be supplied to the Company or the Selling Stockholders by you on request. Any such statements, requests, notices or agreements shall take effect upon receipt thereof.

14. This Agreement shall be binding upon, and inure solely to the benefit of, the Underwriters, the Company and the Selling Stockholders and, to the extent provided in Sections 9 and 11 hereof, the officers and directors of the Company and each person who controls the Company, any Selling Stockholder or any Underwriter, and their respective heirs, executors, administrators, successors and assigns, and no other person shall acquire or have any right under or by virtue of this Agreement. No purchaser of any of the Shares from any Underwriter shall be deemed a successor or assign by reason merely of such purchase.

15. Time shall be of the essence of this Agreement. As used herein, the term “business day” shall mean any day when the Commission’s office in Washington, D.C. is open for business.

16. (a) The Company and the Selling Stockholders acknowledge and agree that (i) the purchase and sale of the Shares pursuant to this Agreement is an arm’s-length commercial transaction between the Company and the Selling Stockholders, on the one hand, and the several Underwriters, on the other, (ii) in connection therewith and with the process leading to such transaction each Underwriter is acting solely as a principal and not the agent or fiduciary of the Company or any Selling stockholder, (iii) no Underwriter has assumed an advisory or fiduciary responsibility in favor of the Company or any Selling Stockholder with respect to the offering contemplated hereby or the process leading thereto (irrespective of whether such Underwriter has advised or is currently advising the Company or any Selling Stockholder on other matters) or any other obligation to the Company or any Selling Stockholder except the obligations expressly set forth in this Agreement and (iv) the Company and each Selling Stockholder has consulted its own legal and financial advisors to the extent it deemed appropriate. The Company and each Selling Stockholder agrees that it will not claim that the Underwriters, or any of them, has rendered advisory services of any nature or respect, or owes a fiduciary or similar duty to the Company or any Selling Stockholder, in connection with such transaction or the process leading thereto.

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(b) Each Selling Stockholder further acknowledges and agrees that, although the Underwriters may provide certain Selling Stockholders with certain Regulation Best Interest and Form CRS disclosures or other related documentation in connection with the offering, the Underwriters are not making a recommendation to any Selling Stockholder to participate in the offering or sell any Shares at the price set forth in Section 2 hereof, and nothing set forth in such disclosures or documentation is intended to suggest that any Underwriter is making such a recommendation.

17. This Agreement supersedes all prior agreements and understandings (whether written or oral) between the Company, the Selling Stockholders and the Underwriters, or any of them, with respect to the subject matter hereof.

18. This Agreement and any claim, controversy or dispute arising under or related to this Agreement shall be governed by, and construed in accordance with, the laws of the State of New York without regard to principles of conflict of laws that would results in the application of any other law than the laws of the State of New York. The Company and each Selling Stockholder agree that any suit or proceeding arising in respect of this Agreement or any transaction contemplated by this Agreement will be tried exclusively in the U.S. District Court for the Southern District of New York or, if that court does not have subject matter jurisdiction, in any state court located in The City and County of New York and the Company and each Selling Stockholder agree to submit to the jurisdiction of, and to venue in, such courts.

19. The Company, each Selling Stockholder and each of the Underwriters hereby irrevocably waives, to the fullest extent permitted by applicable law, any and all right to trial by jury in any legal proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

20. This Agreement may be signed in counterparts (which may include counterparts delivered by any standard form of telecommunication), each of which shall be an original and all of which together shall constitute one and the same instrument. The words “execution,” “signed,” “signature,” “delivery” and words of like import in or relating to this Agreement or any document to be signed in connection with this Agreement shall be deemed to include electronic signatures, deliveries or the keeping of records in electronic form, each of which shall be of the same legal effect, validity or enforceability as a manually executed signature, physical delivery thereof or the use of a paper-based recordkeeping system, as the case may be, and the parties hereto consent to conduct the transactions contemplated hereunder by electronic means.

21. No amendment or waiver of any provision of this Agreement, nor any consent or approval to any departure therefrom, shall in any event be effective unless the same shall be in writing and signed by the parties hereto.

22. Notwithstanding anything herein to the contrary, the Company and the Selling Stockholders are authorized to disclose to any persons the U.S. federal and state income tax treatment and tax structure of the potential transaction and all materials of any kind (including tax opinions and other tax analyses) provided to the Company and the Selling Stockholders relating to that treatment and structure, without the Underwriters imposing any limitation of any kind. However, any information relating to the tax treatment and tax structure shall remain confidential (and the foregoing sentence shall not apply) to the extent necessary to enable any person to comply with securities laws. For this purpose, “tax structure” is limited to any facts that may be relevant to that treatment.

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23. (a) In the event that any Underwriter that is a Covered Entity becomes subject to a proceeding under a U.S. Special Resolution Regime, the transfer from such Underwriter of this Agreement, and any interest and obligation in or under this Agreement, will be effective to the same extent as the transfer would be effective under the U.S. Special Resolution Regime if this Agreement, and any such interest and obligation, were governed by the laws of the United States or a state of the United States.

(b) In the event that any Underwriter that is a Covered Entity or a BHC Act Affiliate of such Underwriter becomes subject to a proceeding under a U.S. Special Resolution Regime, Default Rights under this Agreement that may be exercised against such Underwriter are permitted to be exercised to no greater extent than such Default Rights could be exercised under the U.S. Special Resolution Regime if this Agreement were governed by the laws of the United States or a state of the United States.

As used in this Section 23:

“BHC Act Affiliate” has the meaning assigned to the term “affiliate” in, and shall be interpreted in accordance with, 12 U.S.C. § 1841(k).

“Covered Entity” means any of the following:

(i) a “covered entity” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 252.82(b);

(ii) a “covered bank” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 47.3(b); or

(iii) a “covered FSI” as that term is defined in, and interpreted in accordance with, 12 C.F.R. § 382.2(b).

“Default Right” has the meaning assigned to that term in, and shall be interpreted in accordance with, 12 C.F.R. §§ 252.81, 47.2 or 382.1, as applicable.

“U.S. Special Resolution Regime” means each of (i) the Federal Deposit Insurance Act and the regulations promulgated thereunder and (ii) Title II of the Dodd-Frank Wall Street Reform and Consumer Protection Act and the regulations promulgated thereunder.

If the foregoing is in accordance with your understanding, please sign and return to us one counterpart hereof, and upon the acceptance hereof by you, on behalf of each of the Underwriters, this letter and such acceptance hereof shall constitute a binding agreement among each of the Underwriters, the Company and each of the Selling Stockholders. It is understood that your acceptance of this letter on behalf of each of the Underwriters is pursuant to the authority set forth in a form of Agreement among Underwriters, the form of which shall be submitted to the Company and the Selling Stockholders for examination, upon request, but without warranty on your part as to the authority of the signers thereof.

[Signature pages follow.]

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[Signature Page to Underwriting Agreement]

[Signature Page to Underwriting Agreement]

[Signature Page to Underwriting Agreement]

[Signature Page to Underwriting Agreement]

[Signature Page to Underwriting Agreement]

[Signature Page to Underwriting Agreement]

Accepted as of the date hereof

Goldman Sachs & Co. LLC

On behalf of each of the Underwriters

[Signature Page to Underwriting Agreement]

Exhibit 5.1

May 15, 2024

Permian Resources Corporation

300 N. Marienfeld St., Suite 1000

Midland, Texas 79701

Ladies and Gentlemen:

We have acted as counsel for Permian Resources Corporation, a Delaware corporation (the “Company”), with respect to certain legal matters in connection with the registration by the Company under the Securities Act of 1933 (the “Securities Act”) of the offer and sale by Jeffrey H. Tepper (the “Subject Selling Stockholder”), a holder of the Company’s Class A common stock, par value $0.0001 per share (“Class A Common Stock”), of an aggregate 65,000 shares of Class A Common Stock (the “Shares”), pursuant to the Underwriting Agreement, dated May 13, 2024 (the “Underwriting Agreement”), by and among the Company, the selling stockholders thereunder, including the Subject Selling Stockholder, and Goldman Sachs & Co. LLC as underwriter (the “Underwriter”).

The Shares have been offered for sale pursuant to a prospectus supplement, dated May 13, 2024 (the “Prospectus Supplement”), and filed with the Securities and Exchange Commission (the “Commission”) pursuant to Rule 424(b) on May 15, 2024, to a prospectus dated November 8, 2023 (such prospectus, as amended and supplemented by the Prospectus Supplement, the “Prospectus”) that constitutes a part of the Company’s Registration Statement on Form S-3ASR (Registration No. 333-275405), filed with the Commission on November 8, 2023 (the “Registration Statement”), which Registration Statement became immediately effective upon filing with the Commission.

We have examined originals or copies, certified or otherwise identified to our satisfaction, of (i) the Registration Statement; (ii) the Prospectus forming a part of the Registration Statement; (iii) the Fourth Amended and Restated Certificate of Incorporation of the Company and the Second Amended and Restated Bylaws of the Company; (iv) certain resolutions adopted by the Board of Directors of the Company relating to the Prospectus Supplement, the Prospectus, the Registration Statement and related matters; and (v) such other certificates, statutes and other instruments and documents as we considered appropriate for purposes of the opinion hereafter expressed.

As to any facts material to our opinion contained herein, we have made no independent investigation of such facts and have relied, to the extent that we deem such reliance proper, upon certificates from officers of the Company and other representatives of the Company, and upon certificates of public officials.

May 15, 2024

Page 2

In rendering the opinion set forth below, we have assumed that (i) all information contained in all documents reviewed by us is true and correct; (ii) all signatures on all documents examined by us are genuine; (iii) all documents submitted to us as originals are authentic and all documents submitted to us as copies conform to the originals of those documents; (iv) each natural person signing any document reviewed by us had the legal capacity to do so; (v) each person signing in a representative capacity (other than on behalf of the Company) any document reviewed by us had authority to sign in such capacity; (vi) the Registration Statement, and any amendments thereto (including post-effective amendments), is effective and complies with all applicable laws; (vii) the Company has timely filed all necessary reports pursuant to the Securities Exchange Act of 1934; (viii) the Prospectus Supplement complies with all applicable laws; (ix) all Shares have been sold in compliance with applicable federal and state securities laws and in the manner stated in the Registration Statement and the Prospectus and any applicable prospectus supplement; and (x) the Underwriting Agreement has been duly authorized and validly executed and delivered by selling stockholders thereunder, including the Subject Selling Stockholder, and the Underwriter. We express no opinion as to the requirements of or compliance with federal or state securities laws or regulations.

Based upon and subject to the foregoing, it is our opinion that the Shares are validly issued, fully paid and nonassessable.

The opinion expressed in this letter is limited to the General Corporation Law of the State of Delaware and the federal laws of the United States of America as in effect on the date hereof, and we undertake no duty to update or supplement the foregoing opinion to reflect any facts or circumstances that may hereafter come to our attention or to reflect any changes in any law that may hereafter occur or become effective. We do not express any opinion as to the laws of any other jurisdiction.

We hereby consent to the filing of this opinion as an exhibit to a Current Report on Form 8-K. We also consent to the reference to this firm under the heading “Legal Matters” in the Prospectus. In giving this consent, we do not admit that we are within the category of persons whose consent is required under Section 7 of the Securities Act.

We disclaim any duty to advise you regarding any changes in, or otherwise communicate with you with respect to, the matters addressed herein.

Very truly yours,

/s/ Vinson & Elkins L.L.P.

Exhibit 99.1

Permian Resources Corporation Announces Pricing of Secondary Public Offering of Class

A Common Stock

May 13, 2024

MIDLAND, Texas—(BUSINESS WIRE)—Permian Resources Corporation (“Permian Resources” or the “Company”) (NYSE: PR) today announced the pricing of an underwritten public offering of an aggregate 51,765,000 shares of its Class A Common Stock, par value $0.0001 per share (“Class A common stock”), at a price to the public of $16.47 per share, by certain affiliates of EnCap Investments L.P., NGP Energy Capital Management L.L.C., Pearl Energy Investments, Riverstone Investment Group LLC and a certain member of the Company’s Board of Directors (collectively, the “Selling Stockholders”). Permian Resources will not sell any shares of Class A common stock in the offering and will not receive any proceeds therefrom.

Concurrently with the closing of the offering, the Company has agreed to purchase (the “Concurrent OpCo Unit Purchase”) from certain of the Selling Stockholders an aggregate 1,800,000 common units representing limited liability company interests (“OpCo Units”) in Permian Resources Operating, LLC, a Delaware limited liability company and a subsidiary of Permian Resources (“OpCo”), at a price per OpCo Unit equal to the price per share at which the underwriter purchases shares of Class A common stock in the offering and to cancel a corresponding number of shares of the Company’s Class C Common Stock, par value $0.0001 per share, held by such Selling Stockholders. The offering of Class A common stock is not conditioned upon the completion of the Concurrent OpCo Unit Purchase, but the Concurrent OpCo Unit Purchase is conditioned upon the completion of the offering.

Goldman Sachs & Co. LLC is serving as the underwriter for the offering. The offering is expected to close on May 15, 2024, subject to customary closing conditions.

The offering is being made pursuant to a registration statement previously filed by the Company with the U.S. Securities and Exchange Commission (the “SEC”) which became automatically effective upon filing on November 8, 2023.

The offering is being made only by means of a prospectus and prospectus supplement that meet the requirements under the Securities Act of 1933, as amended (the “Securities Act”). Copies of the preliminary prospectus supplement and accompanying base prospectus and final prospectus supplement, when available, may be obtained from: Goldman Sachs & Co. LLC, Prospectus Department, 200 West Street, New York, NY 10282, telephone: 866-471-2526, facsimile: 212-902-9316 or by emailing Prospectus-ny@ny.email.gs.com; or by accessing the SEC’s website at www.sec.gov.

This press release shall not constitute an offer to sell or a solicitation of an offer to buy shares of Class A common stock or any other securities, nor shall there be any sale of securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful without registration or qualification under the securities laws of any such state or jurisdiction.

About Permian Resources

Headquartered in Midland, Texas, Permian Resources is an independent oil and natural gas company focused on the responsible acquisition, optimization and development of high-return oil and natural gas properties. Permian Resources’ assets and operations are concentrated in the core of the Delaware Basin.

Cautionary Note Regarding Forward-Looking Statements

The information in this press release includes “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Securities Exchange Act of 1934, as amended. All statements, other than statements of historical fact included in this press release, regarding the completion of the offering and the Concurrent OpCo Unit Purchase, the Company’s strategy, future operations, financial position, estimated revenues and losses, projected costs, prospects, plans and objectives of management are forward-looking statements. When used in this press release, the words “could,” “may,” “believe,” “anticipate,” “intend,” “estimate,” “expect,” “project,” “goal,” “plan,” “target” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain such identifying words. These forward-looking statements are based on management’s current expectations and assumptions about future events and are based on currently available information as to the outcome and timing of future events. Be cautioned that these forward-looking statements are subject to all of the risk and uncertainties, most of which are difficult to predict and many of which are beyond Permian Resources’ control, incident to the development, production, gathering and sale of oil and natural gas. These risks include, but are not limited to, commodity price volatility, inflation, lack of availability of drilling and production equipment and services and risks relating to the Company’s ability to realize the anticipated benefits and synergies of its merger with Earthstone Energy, Inc. Actual results could differ materially from those anticipated in these forward-looking statements as a result of certain factors, including, but not limited to, those set forth in the Company’s filings with the SEC, including the prospectus relating to the offering, the registration statement described above, its Annual Report on Form 10-K for the fiscal year ended December 31, 2023, and its subsequent Quarterly Reports on Form 10-Q, under the caption “Risk Factors,” as may be updated from time to time in the Company’s periodic filings with the SEC. Any forward-looking statement in this press release speaks only as of the date of this release. The Company undertakes no obligation to publicly update or review any forward-looking statement, whether as a result of new information, future developments or otherwise, except as may be required by any applicable securities laws.

Contacts:

Hays Mabry – Vice President, Investor Relations

Mae Herrington – Engineering Advisor, Investor Relations

(832) 240-3265

ir@permianres.com