What changed in this filing

/stocks — the workspaceLOADING

Item 9A. Controls and Procedures

2023-02-28 compared with 2022-02-25 · 120 added, 104 removed, 194 unchanged (54% of the section changed)

11 unchanged sentences

In making this assessment, management, including our CEO and CFO, used the criteria set forth by the Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (“COSO”).

Based on this assessment, our CEO and CFO have concluded that our internal control over financial reporting was effective as of December 31, 2021.

Based on this assessment, management has concluded that our internal control over financial reporting was effective as of December 31, 2022.

Management’s assessment and conclusion on the effectiveness of our internal control over financial reporting as of December 31, 2022 excludes an assessment of the internal control over financial reporting of Whiting as it was acquired by the Company in a purchase business combination on July 1, 2022.

The total assets of Whiting represent approximately 60% of the related consolidated financial statement amounts as of December 31, 2022.

The total revenues of Whiting represent approximately 29% of the related consolidated financial statement amounts for the year ended December 31, 2022.

PricewaterhouseCoopers LLP, the independent registered public accounting firm that audited our consolidated financial statements included in this annual report on Form 10-K, has also audited the effectiveness of our internal control over financial reporting as of December 31, 2022 and has issued an unqualified opinion on the effectiveness of our internal control over financial reporting as of December 31, 2022.

2 unchanged sentences

Changes in internal control over financial reporting

There were no changes in our internal control over financial reporting (as defined in Rule 13a-15(f) and Rule 15d-15(f) under the Exchange Act) that occurred during the quarter ended December 31, 2021 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

On July 1, 2022, we completed the Merger.

As part of the ongoing integration of the acquired business, we are in the process of incorporating the controls and related procedures of Whiting.

Other than incorporating Whiting’s controls, there were no changes in internal control over financial reporting that occurred during the quarter ended December 31, 2022 that have materially affected, or are reasonably likely to have a material effect on, our internal control over financial reporting.

Other Information

On February 24, 2023, our Board of Directors approved and adopted the Fourth Amended and Restated Bylaws of the Company (the “Bylaws”).

The Bylaws became effective immediately and include the following changes:

• updating the advance notice provisions relating to stockholder nominations of directors to address Rule 14a-19 of the Exchange Act;

• requiring stockholders soliciting proxies to use a proxy card color other than white;

• updating the advance notice provisions relating to stockholders intending to propose other business (other than proposals to be included in the Company’s proxy statement pursuant to Rule 14a-8 under the Exchange Act) at meetings of stockholders;

• updating the requirements for stockholders to request a special meeting;

Table of Content s

• clarifying that our Board of Directors shall elect a Lead Independent Director when the Board Chair is not independent;

• revisions to align with recent amendments to the Delaware General Corporation Law (“DGCL”);

• revisions to the descriptions of certain Board of Directors and officer positions identified in the Bylaws;

• clarifying the notice procedures in connection with officer and director resignations;

• updating the provisions regarding the right to indemnification by the Company for certain persons;

• clarifying the vote required for stockholders to amend the Bylaws.

The Bylaws also includes various other updates, including certain technical, conforming and clarifying changes.

The foregoing description of the changes effected through the adoption of the Bylaws does not purport to be complete and is qualified in its entirety by reference to the complete text of the Bylaws, a copy of which is attached hereto as Exhibit 3.5(a) and is incorporated herein by reference.

Disclosure Regarding Foreign Jurisdictions that Prevent Inspections

Not applicable.

Table of Content s

Directors, Executive Officers and Corporate Governance

Pursuant to General Instruction G(3) to Form 10-K, we incorporate by reference into this Item the information to be disclosed in our definitive proxy statement for our 2023 Annual Meeting of Stockholders.

The Company’s Code of Business Conduct and Ethics and the Code of Ethics for the Chief Executive Officer, Chief Financial Officer and Controller (the “Code of Ethics”) can be found on the Company’s website located at http://www.oasispetroleum.com, under “Investor Relations — Corporate Governance.” Any stockholder may request a printed copy of the Code of Ethics by submitting a written request to the Company’s Corporate Secretary.

If the Company amends the Code of Ethics or grants a waiver, including an implicit waiver, from the Code of Ethics, the Company will disclose the information on its website.

The waiver information will remain on the website for at least 12 months after the initial disclosure of such waiver.

We intend to satisfy the disclosure requirement under Item 5.05 of Form 8-K relating to amendments to or waivers from any provision of the Code of Ethics applicable to such persons by posting such information on our website.

We have adopted a Code of Business Conduct and Ethics Policy that applies to all of our directors, officers and employees, including our principal executive, principal financial and principal accounting officers, or persons performing similar functions.

Our Code of Business Conduct and Ethics Policy can be found on our website located at http://www.chordenergy.com, under “Investors — Corporate Governance.” Any stockholder may request a printed copy of the Code of Business Conduct and Ethics Policy by submitting a written request to our Corporate Secretary.

We intend to disclose future amendments to certain provisions of the Code of Business Conduct and Ethics Policy, and waivers of the Code of Business Conduct and Ethics Policy granted to executive officers and directors, on our website within four business days following the date of the amendment or waiver.

The waiver information will remain on our website for at least 12 months after the initial disclosure of such waiver.

We intend to satisfy the disclosure requirement under Item 5.05 of Form 8-K relating to amendments to or waivers from any provision of the Code of Business Conduct and Ethics Policy applicable to such persons by posting such information on our website.

Executive Compensation

6 unchanged sentences

Table of Content s

Exhibits, Financial Statement Schedules

8 unchanged sentences

and its Debtor Affiliates (Technical Modifications) (filed as Exhibit 2.1 to Oasis’s Current Report on Form 8-K filed on November 13, 2020, and incorporated herein by reference).

Contribution and Simplification Agreement, dated March 22, 2021, between Oasis Midstream Partners LP, OMS Holdings LLC, Oasis Midstream Services LLC, OMP GP LLC, OMP Operating LLC, OMP DevCo Holdings Corp., Beartooth DevCo LLC, Bobcat DevCo LLC and, for certain limited purposes set forth therein, Oasis Petroleum Inc.

(filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K on March 22, 2021, and incorporated herein by reference).

Joint Chapter 11 Plan of Reorganization of Whiting Petroleum Corporation and its Debtor Affiliates (filed as Exhibit A of Exhibit 99 to Whiting’s Current Report on Form 8-K filed on August 17, 2020, and incorporated herein by reference).

Purchase and Sale Agreement, dated as of May 3, 2021, among Oasis Petroleum North America LLC and QEP Energy Company (filed as Exhibit 2.2 to the Company’s Quarterly Report on Form 10-Q on May 7, 2021, and incorporated herein by reference).

1 unchanged sentence

Agreement and Plan of Merger, dated October 25, 2021, by and among Crestwood Equity Partners LP, Project Falcon Merger Sub LLC, Project Phantom Merger Sub LLC, Oasis Midstream Partners LP, OMP GP LLC and, solely for purposes of Section 2.1(a)(i), Crestwood Equity GP LLC (filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K on October 28, 2021, and incorporated herein by reference).

Conformed version of Amended and Restated Certificate of Incorporation of Oasis Petroleum Inc., as amended by amendment filed on July 25, 2018 (filed as Exhibit 3.1 to the Company’s Quarterly Report on Form 10-Q on August 7, 2018, and incorporated herein by reference).

Amended and Restated Certificate of Incorporation of Oasis Petroleum Inc.

(filed as Exhibit 3.1 to the Company’s Current Report on Form 8-K on November 20, 2020, and incorporated herein by reference).

Amended and Restated Bylaws of Oasis Petroleum Inc.

(filed as Exhibit 3.1 to the Company’s Current Report on Form 8-K on February 28, 2019, and incorporated herein by reference).

Amended and Restated Bylaws of Oasis Petroleum Inc.

(filed as Exhibit 3.2 to the Company’s Current Report on Form 8-K on November 20, 2020, and incorporated herein by reference).

Second Amended and Restated Bylaws of Oasis Petroleum Inc.

adopted as of December 15, 2020 (filed as Exhibit 3.1 to the Company’s Current Report on Form 8-K on December 18, 2020, and incorporated herein by reference).

Agreement and Plan of Merger, dated as of March 7, 2022 by and among Oasis Petroleum Inc., Ohm Merger Sub Inc., New Ohm LLC and Whiting Petroleum Corporation (filed as Exhibit 2.1 to the Company’s Current Report on Form 8-K on March 8, 2022, and incorporated herein by reference).

Conformed version of Amended and Restated Certificate of Incorporation of Chord Energy Corporation, as amended by amendment filed on July 1, 2022.

Third Amended and Restated Bylaws of Chord Energy Corporation adopted as of July 1, 2022 (filed as Exhibit 3.3 to the Company’s Current Report on Form 8-K on July 7, 2022, and incorporated herein by reference).

Certificate of Designations of Series A Junior Participating Preferred Stock of Oasis Petroleum Inc.

(filed as Exhibit 3.1 to the Company’s Current Report on Form 8-K on August 4, 2021, and incorporated herein by reference).

Description of Exhibit

Certificate of Elimination of the Series A Junior Participating Preferred Stock of Oasis Petroleum Inc.

(filed as Exhibit 3.1 to the Company’s Current Report on Form 8-K on July 7, 2022, and incorporated herein by reference).

Fourth Amended and Restated Bylaws of Chord Energy Corporation adopted as of February 24, 2023.

Specimen Common Stock Certificate (filed as Exhibit 4.1 to the Company’s Registration Statement on Form S-1/A on May 19, 2010, and incorporated herein by reference).

Table of Content s

Description of Exhibit

Registration Rights Agreement, dated February 14, 2018, between the Oasis Petroleum Inc.

and Forge Energy, LLC (filed as Exhibit 4.1 to the Company’s Current Report on Form 8-K on February 16, 2018, and incorporated herein by reference).

Description of Registrant’s Securities Registered Under Section 12 of the Exchange Act (filed as Exhibit 4.23 to the Company’s Annual Report on Form 10-K on February 27, 2020, and incorporated herein by reference).

Tax Benefits Preservation Plan, dated as of August 3, 2021, by and between Oasis Petroleum Inc.

and Computershare Trust Company, N.A., as Rights Agent (filed as Exhibit 4.1 to the Company’s Current Report on Form 8-K on August 4, 2021, and incorporated herein by reference).

Form of Indemnification Agreement between Oasis Petroleum Inc.

and each of the directors and executive officers thereof (filed as Exhibit 10.5 to the Company’s Annual Report on Form 10-K on February 27, 2014, and incorporated herein by reference).

Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Exchange Act of 1934.

Indenture, dated as of June 9, 2021, among Chord Energy Corporation (f/k/a Oasis Petroleum Inc.), the Guarantors and Regions Bank, as trustee (filed as Exhibit 4.1 to the Company’s Current Report on Form 8-K on June 15, 2021, and incorporated herein by reference).

First Supplemental Indenture to Indenture dated February 7, 2022, by and among Chord Energy Corporation (f/k/a Oasis Petroleum Inc.), the Guarantors and Regions Bank, as trustee (filed as Exhibit 4.2 to the Company’s Current Report on Form 8-K on August 12, 2022, and incorporated herein by reference).

Second Supplemental Indenture to Indenture dated August 12, 2022, by and among Chord Energy Corporation, the Guarantors and Regions Bank, as trustee (filed as Exhibit 4.3 to the Company’s Current Report on Form 8-K on August 12, 2022, and incorporated herein by reference).

Form of Indemnification Agreement between Chord Energy Corporation (f/k/a Oasis Petroleum Inc.) and each of the directors and executive officers thereof (filed as Exhibit 10.4 to the Company’s Current Report on Form 8-K on November 20, 2020, and incorporated herein by reference).

Amended and Restated 2010 Annual Incentive Compensation Plan of Oasis Petroleum Inc.

(filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q on August 6, 2014, and incorporated herein by reference).

Amended and Restated Executive Change in Control and Severance Benefit Plan dated as of March 1, 2012 (filed as Exhibit 10.4 to the Company’s Current Report on Form 8-K on March 2, 2012, and incorporated herein by reference).

Letter Agreement dated as of March 4, 2015 between the Company and SPO Advisory Corp.

(filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on March 9, 2015, and incorporated herein by reference).

Fourth Amended and Restated Employment Agreement effective as of March 20, 2015 between Oasis Petroleum Inc.

and Taylor L.

Reid (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K on March 20, 2015, and incorporated herein by reference).

Second Amended and Restated Employment Agreement effective as of March 20, 2015 between Oasis Petroleum Inc.

and Michael H.

Lou (filed as Exhibit 10.3 to the Company’s Current Report on Form 8-K on March 20, 2015, and incorporated herein by reference).

Second Amended and Restated Employment Agreement effective as of March 20, 2015 between Oasis Petroleum Inc.

and Nickolas J.

Lorentzatos (filed as Exhibit 10.4 to the Company’s Current Report on Form 8-K on March 20, 2015, and incorporated herein by reference).

Contribution Agreement, dated as of September 25, 2017, by and among Oasis Midstream Partners LP, Oasis Petroleum LLC, OMS Holdings LLC, Oasis Midstream Services LLC, OMP GP LLC and OMP Operating LLC (filed as Exhibit 10.1 to the Company's Current Report on Form 8-K on September 29, 2017, and incorporated herein by reference).

Omnibus Agreement, dated as of September 25, 2017, by and among Oasis Midstream Partners LP, the Company, Oasis Petroleum LLC, OMS Holdings LLC, Oasis Midstream Services LLC, OMP GP LLC and OMP Operating LLC (filed as Exhibit 10.2 to the Company's Current Report on Form 8-K on September 29, 2017, and incorporated herein by reference).

Services and Secondment Agreement, dated as of September 25, 2017, by and between Oasis Midstream Partners LP and the Company (filed as Exhibit 10.4 to the Company's Current Report on Form 8-K on September 29, 2017 and incorporated herein by reference).

Description of Exhibit

Third Amended and Restated Credit Agreement, dated as of October 16, 2018, by and among Oasis Petroleum Inc., as parent, Oasis Petroleum North America LLC, as borrower, the other credit parties thereto, Wells Fargo Bank, N.A., as administrative agent, and the lenders party thereto (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K filed on October 19, 2018, and incorporated herein by reference).

1 unchanged sentence

Second Amendment to the Third Amended and Restated Credit Agreement, dated as of July 2, 2019, among Oasis Petroleum Inc., as parent, Oasis Petroleum North America LLC, as borrower, the other credit parties party thereto, Wells Fargo Bank, N.A., as administrative agent and the lenders party thereto (filed as Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q on August 9, 2019, and incorporated herein by reference).

Third Amendment to the Third Amended and Restated Credit Agreement, dated as of November 4, 2019, among Oasis Petroleum Inc., as parent, Oasis Petroleum North America LLC, as borrower, the other credit parties party thereto, Wells Fargo Bank, N.A., as administrative agent and the lenders party thereto (filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q on November 6, 2019, and incorporated herein by reference).

Fifth Amended and Restated Employment Agreement effective as of March 20, 2018 between Oasis Petroleum Inc.

and Taylor L.

Reid (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K on March 22, 2018, and incorporated herein by reference).

Third Amended and Restated Employment Agreement effective as of March 20, 2018 between Oasis Petroleum Inc.

and Michael H.

Lou (filed as Exhibit 10.3 to the Company’s Current Report on Form 8-K on March 22, 2018, and incorporated herein by reference).

Third Amended and Restated Employment Agreement effective as of March 20, 2018 between Oasis Petroleum Inc.

and Nickolas J.

Lorentzatos (filed as Exhibit 10.4 to the Company’s Current Report on Form 8-K on March 22, 2018, and incorporated herein by reference).

Amended and Restated 2010 Long Term Incentive Plan of Oasis Petroleum Inc.

(filed as Exhibit 10.2 to the Company’s Quarterly Report on Form 10-Q on May 4, 2018, and incorporated herein by reference).

First Amendment to the Amended and Restated 2010 Long Term Incentive Plan of Oasis Petroleum Inc.

(filed as Exhibit 10.1 to the Company's Current Report on Form 8-K on May 3, 2019, and incorporated herein by reference).

Form of Phantom Unit Award Grant Notice (filed as Exhibit 10.43 to the Company’s Annual Report on Form 10-K on March 1, 2019, and incorporated herein by reference).

Form of Phantom Unit Award Agreement (filed as Exhibit 10.44 to the Company’s Annual Report on Form 10-K on March 1, 2019, and incorporated herein by reference).

Second Amendment to the Amended and Restated 2010 Long Term Incentive Plan of Oasis Petroleum Inc.

(filed as Exhibit 10.46 to the Company’s Annual Report on Form 10-K on February 27, 2020, and incorporated herein by reference).

Third Amendment to the Amended and Restated 2010 Long Term Incentive Plan of Oasis Petroleum Inc.

(filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on April 28, 2020, and incorporated herein by reference).

Table of Content s

Description of Exhibit

Limited Waiver and Fourth Amendment to the Third Amended and Restated Credit Agreement, dated as of April 24, 2020, among Oasis Petroleum North America LLC, as borrower, the guarantors thereto, Wells Fargo Bank, N.A., as administrative agent and issuing bank and the lenders party thereto (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on April 30, 2020, and incorporated herein by reference).

Form of Incentive Clawback Agreement (filed as Exhibit 10.3 to the Company’s Quarterly Report on Form 10-Q on August 5, 2020, and incorporated herein by reference).

Direction Letter and Specified Swap Liquidation Agreement (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on September 21, 2020, and incorporated herein by reference).

2 unchanged sentences

Exit Commitment Letter, dated September 29, 2020 (filed as Exhibit 10.3 to the Company’s Current Report on Form 8-K on September 30, 2020, and incorporated herein by reference).

Amendment to Fifth Amended and Restated Employment Agreement effective as of September 29, 2020 between Oasis Petroleum Inc.

and Taylor L.

Reid (filed as Exhibit 10.5 to the Company’s Current Report on Form 8-K on September 30, 2020, and incorporated herein by reference).

Amendment to Third Amended and Restated Employment Agreement effective as of September 29, 2020 between Oasis Petroleum Inc.

and Michael H.

Lou (filed as Exhibit 10.6 to the Company’s Current Report on Form 8-K on September 30, 2020, and incorporated herein by reference).

Amendment to Third Amended and Restated Employment Agreement effective as of September 29, 2020 between Oasis Petroleum Inc.

and Nickolas J.

Lorentzatos (filed as Exhibit 10.7 to the Company’s Current Report on Form 8-K on September 30, 2020, and incorporated herein by reference).

Senior Secured Superpriority Debtor-in-Possession Revolving Credit Agreement, dated as of October 2, 2020, by and among Oasis Petroleum Inc., Oasis Petroleum North America LLC, the Guarantors party thereto, the Lenders party from time to time thereto, and Wells Fargo Bank, National Association (filed as Exhibit 10.9 to the Company’s Quarterly Report on Form 10-Q on November 5, 2020, and incorporated herein by reference).

2 unchanged sentences

(filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K on November 20, 2020, and incorporated herein by reference).

Description of Exhibit

Registration Rights Agreement, dated as of November 19, 2020, by and between the Oasis Petroleum Inc.

5 unchanged sentences

Employment Agreement, dated January 18, 2021, by and between Oasis Petroleum Inc.

and Taylor L.

Reid (filed as Exhibit 99.2 to the Company’s Current Report on Form 8-K on January 21, 2021, and incorporated herein by reference).

Employment Agreement, dated January 18, 2021, by and between Oasis Petroleum Inc.

and Michael H.

Lou (filed as Exhibit 99.3 to the Company’s Current Report on Form 8-K on January 21, 2021, and incorporated herein by reference).

Employment Agreement, dated January 18, 2021, by and between Oasis Petroleum Inc.

and Nickolas J.

Lorentzatos (filed as Exhibit 99.4 to the Company’s Current Report on Form 8-K on January 21, 2021, and incorporated herein by reference).

Table of Content s

Description of Exhibit

Employment Agreement, dated April 13, 2021, by and between Oasis Petroleum Inc.

1 unchanged sentence

Brown (filed as Exhibit 99.2 to the Company’s Current Report on Form 8-K on April 19, 2021, and incorporated herein by reference).

Form of Notice of Grant for Restricted Stock Units for Daniel E.

Brown dated April 13, 2021 (with form of associated Restricted Stock Unit Agreement attached thereto) (filed as Exhibit 99.3 to the Company’s Current Report on Form 8-K on April 19, 2021, and incorporated herein by reference).

Form of Notice of Grant for Relative Total Shareholder Return Performance Share Units for Daniel E.

Brown dated April 13,2021 (with form of associated Performance Share Unit Agreement attached thereto) (filed as Exhibit 99.4 to the Company’s Current Report on Form 8-K on April 19, 2021, and incorporated herein by reference).

Form of Notice of Grant for Absolute Total Shareholder Return Performance Share Units for Daniel E.

Brown dated April 13, 2021 (with form of associated Performance Share Unit Agreement attached thereto) (filed as Exhibit 99.5 to the Company’s Current Report on Form 8-K on April 19, 2021, and incorporated herein by reference).

Indemnification Agreement, dated April 13, 2021, by and between Oasis Petroleum Inc.

and Daniel E.

Brown (filed as Exhibit 99.6 to the Company’s Current Report on Form 8-K on April 19, 2021, and incorporated herein by reference).

Form of Notice of Grant for Restricted Stock Units (with form of associated Restricted Stock Unit Agreement attached thereto) (filed as Exhibit 99.5 to the Company’s Current Report on Form 8-K on January 21, 2021, and incorporated herein by reference).

1 unchanged sentence

Form of Notice of Grant for Absolute Total Shareholder Return Performance Share Units (with form of associated Phantom Share Unit Agreement attached thereto) (filed as Exhibit 99.7 to the Company’s Current Report on Form 8-K/A on February 5, 2021, and incorporated herein by reference).

Description of Exhibit

First Amendment to Credit Agreement, dated as of February 19, 2021, among Oasis Petroleum Inc., as parent, Oasis Petroleum North America LLC, as borrower, Oasis Petroleum LLC, as OP LLC, the lenders party thereto and Wells Fargo Bank, N.A., as administrative agent (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on February 24, 2021, and incorporated herein by reference).

4 unchanged sentences

Sixth Amendment to Credit Agreement, dated December 22, 2021, by and among Oasis Petroleum Inc., as parent, Oasis Petroleum LLC, a Delaware limited liability company, Oasis Petroleum North America LLC, a Delaware limited liability company, as borrower, the guarantors party thereto, Wells Fargo Bank, N.A., as administrative agent, issuing bank and swingline lender, and the lenders party thereto (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on December 29, 2021, and incorporated herein by reference).

Table of Content s

Description of Exhibit

Commitment Letter, dated as of May 3, 2021, by and among the Company and JPMorgan Chase Bank, N.A.

3 unchanged sentences

Support Agreement, dated October 25, 2021, by and among Crestwood Equity Partners LP, Oasis Midstream Partners LP, Oasis Petroleum Inc., OMP GP LLC and OMS Holdings LLC (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on October 28, 2021, and incorporated herein by reference).

List of Subsidiaries of Oasis Petroleum Inc.

Consent of PricewaterhouseCoopers LLP.

Whiting Petroleum Corporation 2020 Equity Incentive Plan (filed as Exhibit 99.1 to the Company’s Registration Statement on Form S-8 on July 14, 2022, and incorporated herein by reference).

Executive Employment and Severance Agreement, dated February 2, 2021, by and between Whiting Petroleum Corporation and Lynn A.

Peterson (filed as Exhibit 10.1 to Whiting’s Current Report on Form 8-K on February 4, 2021, and incorporated herein by reference).

Letter Agreement, dated as of March 7, 2022, between Oasis Petroleum Inc.

Peterson (filed as Exhibit 10.1 to the Company’s Current Report on Form 8-K on March 8, 2022, and incorporated herein by reference).

Executive Employment and Severance Agreement by and between Whiting Petroleum Corporation and Charles J.

Rimer, effective as of February 2, 2021 (filed as Exhibit 10.3 to Whiting’s Current Report on Form 8-K on February 4, 2021, and incorporated herein by reference).

First Addendum to Executive Employment and Severance Agreement by and between Whiting Petroleum Corporation and Charles J.

Rimer, dated April 13, 2022 (filed as Exhibit 10.1 to Whiting’s Current Report on Form 8-K on April 15, 2022, and incorporated herein by reference).

Second Addendum to Executive Employment and Severance Agreement by and between Whiting Petroleum Corporation and Charles J.

Rimer, effective as of January 1, 2023.

Form of Executive Employment Agreement and Severance Agreement for former executive officers of Whiting Petroleum Corporation who served or are serving as executive officers of Chord Energy Corporation other than Lynn A.

Peterson, James P.

Henderson and Charles J.

Rimer (filed as Exhibit 10.20 to Whiting’s Annual Report on Form 10-K on February 24, 2021, and incorporated herein by reference).

Oasis Petroleum Inc.

2021 Executive Change in Control and Severance Benefit Plan.

Chord Energy Corporation Restricted Stock Unit Award Agreement (Non-Employee Director Form).

Chord Energy Corporation Restricted Stock Unit Award Agreement (Time Vesting Form).

Series A Warrant Agreement, dated as of September 1, 2020, by and among Whiting Petroleum Corporation, Computershare Inc.

and Computershare Trust Company, N.A.

(filed as Exhibit 10.2 to Whiting’s Current Report on Form 8-K12B on September 1, 2020, and incorporated herein by reference).

Series B Warrant Agreement, dated as of September 1, 2020, by and among Whiting Petroleum Corporation, Computershare Inc.

and Computershare Trust Company, N.A.

(filed as Exhibit 10.3 to Whiting’s Current Report on Form 8-K12B on September 1, 2020, and incorporated herein by reference).

Table of Content s

Description of Exhibit

Warrant Assignment and Assumption Agreement, dated as of July 1, 2022, by and among Oasis Petroleum Inc., Whiting Petroleum Corporation, Computershare Inc.

and Computershare Trust Company, N.A.

(filed as Exhibit 10.3 to the Company’s Current Report on Form 8-K on July 7, 2022, and incorporated herein by reference).

Amended and Restated Credit Agreement, dated as of July 1, 2022, by and among Oasis Petroleum Inc., Oasis Petroleum LLC, Oasis Petroleum North America LLC, Wells Fargo Bank, N.A., and the other parties party thereto.

(filed as Exhibit 10.4 to the Company’s Current Report on Form 8-K on July 7, 2022, and incorporated herein by reference).

First Amendment to Amended and Restated Credit Agreement, dated as of August 8, 2022, by and among Chord Energy Corporation, Oasis Petroleum North America LLC, Wells Fargo Bank, N.A., and the other parties thereto (filed as Exhibit 10.2 to the Company’s Current Report on Form 8-K on August 12, 2022, and incorporated herein by reference).

Second Amendment to Amended and Restated Credit Agreement, dated October 31, 2022, by and among Chord Energy Corporation, Oasis Petroleum North America LLC, Wells Fargo Bank, N.A., and the other parties thereto (filed as Exhibit 10.7 to the Company’s Report on Form 10-Q on November 11, 2022, and incorporated herein by reference).

List of Subsidiaries of Chord Energy Corporation.

Consent of PricewaterhouseCoopers LLP.

Consent of Netherland, Sewell & Associates, Inc.

Consent of DeGolyer and MacNaughton.

3 unchanged sentences

Sarbanes-Oxley Section 906 certification of Principal Financial Officer.

Report of DeGolyer and MacNaughton

101(a) The following financial information from Oasis’s Annual Report on Form 10-K for the year ended December 31, 2021, formatted in Inline XBRL:

Report of Netherland, Sewell & Associates, Inc., Independent Petroleum Engineers relating to Total Proved Reserves, dated February 2, 2023.

101(a) The following financial information from Chord’s Annual Report on Form 10-K for the year ended December 31, 2022, formatted in Inline XBRL:

(i) Consolidated Balance Sheets, (ii) Consolidated Statements of Operations, (iii) Consolidated Statements of Stockholders’ Equity, (iv) Consolidated Statements of Cash Flows and (v) Notes to the Consolidated Financial Statements.

6 unchanged sentences

Form 10-K Summary

Table of Content s

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized, on February 28, 2023.

OASIS PETROLEUM INC.

CHORD ENERGY CORPORATION

/s/ Daniel E.

Chief Executive Officer

President & Chief Executive Officer

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

1 unchanged sentence

/s/ Daniel E.

Brown Chief Executive Officer

Brown President & Chief Executive Officer

(Principal Executive Officer) February 28, 2023

2 unchanged sentences

(Principal Financial Officer and Principal Accounting Officer) February 28, 2023

Peterson Executive Chair February 28, 2023

/s/ Douglas E.

Brooks Board Chair February 24, 2022

/s/ Samantha Holroyd Director February 24, 2022

Samantha Holroyd

/s/ John Jacobi Director February 24, 2022

John Lancaster, Jr.

Director February 24, 2022

John Lancaster, Jr.

/s/ Robert McNally Director February 24, 2022

Robert McNally

Brooks Lead Independent Director February 28, 2023

Cunningham Director February 28, 2023

/s/ Samantha F.

Holroyd Director February 28, 2023

Korus Director February 28, 2023

McCarthy Director February 28, 2023

/s/ Anne Taylor Director February 28, 2023

/s/ Cynthia L.

4 unchanged sentences

Woung-Chapman

Table of Content s

GLOSSARY OF TERMS

8 unchanged sentences

“ Completion .” The process of treating a drilled well followed by the installation of permanent equipment for the production of natural gas or oil, or in the case of a dry hole, the reporting of abandonment to the appropriate agency.

“ DAPL .” Dakota Access Pipeline.

“ Developed acreage .” The number of acres that are allocated or assignable to productive wells or wells capable of production.

“ Developed reserves .” Reserves of any category that can be expected to be recovered through existing wells with existing equipment and operating methods or for which the cost of required equipment is relatively minor when compared to the cost of a new well.

“ Development well .” A well drilled within the proved area of a natural gas or crude oil reservoir to the depth of a stratigraphic horizon known to be productive.

“ Development well .” A well drilled within the proved area of a crude oil or natural gas reservoir to the depth of a stratigraphic horizon known to be productive.

“ Dry hole .” A well found to be incapable of producing hydrocarbons in sufficient quantities such that proceeds from the sale of such production exceed production expenses and taxes.

1 unchanged sentence

“ Environmental assessment .” An environmental assessment, a study that can be required pursuant to federal law to assess the potential direct, indirect and cumulative impacts of a project.

“ Exploratory well .” A well drilled to find and produce natural gas or oil reserves not classified as proved, to find a new reservoir in a field previously found to be productive of natural gas or crude oil in another reservoir or to extend a known reservoir.

“ ESG .” Environmental, social and governance.

“ Exploratory well .” A well drilled to find a new field or to find a new reservoir in a field previously found to be productive of oil or natural gas in another reservoir.

” Federal Deposit Insurance Corporation

“ Field .” An area consisting of a single reservoir or multiple reservoirs all grouped on, or related to, the same individual geological structural feature or stratigraphic condition.

1 unchanged sentence

“ Formation .” A layer of rock which has distinct characteristics that differ from nearby rock.

” Generally accepted accounting principles in the United States.

“ GHG(s) .” Greenhouse Gas(es).

Gases in the atmosphere known to trap heat, the most prevalent of which are carbon dioxide, methane, nitrous oxide and water vapor, among many others.

“ Horizontal drilling .” A drilling technique used in certain formations where a well is drilled vertically to a certain depth and then drilled at a right angle within a specified interval.

6 unchanged sentences

“ MMcf .” One million cubic feet of natural gas.

Table of Content s

“ Net acres .” The percentage of total acres an owner has out of a particular number of acres, or a specified tract.

2 unchanged sentences

“ NYMEX .” The New York Mercantile Exchange.

“ OPEC+ .” The Organization of Petroleum Exporting Countries and other oil exporting nations.

“Plug.” A down-hole packer assembly used in a well to seal off or isolate a particular formation for testing, acidizing, cementing, etc.;

also a type of plug used to seal off a well temporarily while the wellhead is removed.

“ Possible reserves .” Additional reserves that are less certain to be recovered than probable reserves.

“ Probable reserves .” Additional reserves that are less certain to be recovered than proved reserves but which, together with proved reserves, are as likely as not to be recovered.

“ Productive well .” A well that is found to be capable of producing hydrocarbons in sufficient quantities such that proceeds from the sale of the production exceed production expenses and taxes.

6 unchanged sentences

The area of the reservoir considered as proved includes (i) the area identified by drilling and limited by fluid contacts, if any, and (ii) adjacent undrilled portions of the reservoir that can, with reasonable certainty, be judged to be continuous with it and to contain economically producible crude oil or gas on the basis of available geoscience and engineering data.

In the absence of data on fluid contacts, proved quantities in a reservoir are limited by the lowest known hydrocarbons, LKH, as seen in a well penetration unless geoscience, engineering, or performance data and reliable technology establishes a lower contact with reasonable certainty.

Where direct observation from well penetrations has defined a highest known oil, HKO, elevation and the potential exists for an associated gas cap, proved oil reserves may be assigned in the structurally higher portions of the reservoir only if geoscience, engineering, or performance data and reliable technology establish the higher contact with reasonable certainty.

In the absence of data on fluid contacts, proved quantities in a reservoir are limited by the lowest known hydrocarbons, as seen in a well penetration unless geoscience, engineering, or performance data and reliable technology establishes a lower contact with reasonable certainty.

Where direct observation from well penetrations has defined a highest known oil, elevation and the potential exists for an associated gas cap, proved oil reserves may be assigned in the structurally higher portions of the reservoir only if geoscience, engineering, or performance data and reliable technology establish the higher contact with reasonable certainty.

Reserves which can be produced economically through application of improved recovery techniques (including, but not limited to, fluid injection) are included in the proved classification when (i) successful testing by a pilot project in an area of the reservoir with properties no more favorable than in the reservoir as a whole, the operation of an installed program in the reservoir or an analogous reservoir, or other evidence using reliable technology establishes the reasonable certainty of the engineering analysis on which the project or program was based;

2 unchanged sentences

The price shall be the average price during the 12-month period prior to the ending date of the period covered by the report, determined as an unweighted arithmetic average of the first-day-of-the-month price for each month within such period, unless prices are defined by contractual arrangements, excluding escalations based upon future conditions.

“ Proved undeveloped reserves .” Proved reserves that are expected to be recovered from new wells on undrilled acreage or from existing wells where a relatively major expenditure is required for recompletion.

“ PV-10 .” When used with respect to oil and natural gas reserves, PV-10 means the estimated future gross revenue to be generated from the production of proved reserves, net of estimated production and future development and abandonment costs, using prices and costs in effect at the determination date, before income taxes, and without giving effect to non-property-related expenses, discounted to a present value using an annual discount rate of 10% in accordance with the guidelines of the Securities and Exchange Commission.

“ Proved undeveloped reserves or PUD reserves .” Proved reserves that are expected to be recovered from new wells on undrilled acreage or from existing wells where a relatively major expenditure is required for recompletion.

“ Reasonable certainty .” If deterministic methods are used, reasonable certainty means a high degree of confidence that the quantities will be recovered.

1 unchanged sentence

A high degree of confidence exists if the quantity is much more likely to be achieved than not, and, as changes due to increased availability of geoscience (geological, geophysical and geochemical) engineering, and economic data are made to estimated ultimate recovery with time, reasonably certain estimated ultimate recovery is much more likely to increase or remain constant than to decrease.

Table of Content s

“ Recompletion .” The process of re-entering an existing wellbore that is either producing or not producing and completing new reservoirs in an attempt to establish or increase existing production.

2 unchanged sentences

“Resource play.” An expansive contiguous geographical area with known accumulations of crude oil or natural gas reserves that has the potential to be developed uniformly with repeatable commercial success due to advancements in horizontal drilling and completion technologies.

“SEC.” The U.S.

Securities and Exchange Commission.

“ Spacing .” The distance between wells producing from the same reservoir.

1 unchanged sentence

“Throughput.” The volume of product passing through a pipeline, plant, terminal or other facility.

“Turn-in-line” or “TIL” To turn a drilled and completed well online to begin sales.

“Unconventional resource.” An umbrella term for crude oil and natural gas that is produced by means that do not meet the criteria for conventional production.

16 unchanged sentences

Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.

What changed 10-K

Item 9A. Controls and Procedures