Executive Vice President, Chief Administrative Officer, General Counsel, and Corporate Secretary — Shannon Kinney: Ms. Kinney resigned to pursue an opportunity as the General Counsel of ConocoPhillips.

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

Entry into a Material Definitive Agreement. Indenture for 6.000% Senior Notes due 2030 On September 30, 2025, Chord Energy Corporation (the “Company”) completed its previously announced offering of $750 million in aggregate principal amount of its 6.000% senior unsecured notes due 2030 (the “Notes”), which are fully and unconditionally guaranteed on a senior unsecured basis by certain of the Company’s subsidiaries (collectively, the “Guarantors”). The terms of the Notes are governed by the in…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

Other Events. On September 16, 2025, the Company entered into a Purchase Agreement (the “ Notes Purchase Agreement ”), among the Company, the subsidiary guarantors named therein (the “ Guarantors ”), and J.P. Morgan Securities LLC (the “ Representative ”), as representative of the several initial purchasers (the “ Initial Purchasers ”), pursuant to which the Company agreed to issue and sell to the Initial Purchasers $750 million in aggregate principal amount of the Company’s new 6.000% senior…

by reference. Cautionary Note Regarding Forward-Looking Statements The information in this Current Report on Form 8-K includes “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. All statements, other than statements of historical fact included in this Current Report on Form 8-K, including statements regarding the Notes Offering and the use of proceeds therefrom, the XTO Acquisition, and our strategy, plans and objectives o…

Regulation FD Disclosure. Proposed Notes Offering On September 16, 2025, Chord Energy Corporation (the “ Company, ” “ we ,” or “ our ”) announced that it has commenced an offering of $500 million aggregate principal amount of new senior unsecured notes due 2030 (the “ Notes ”) in a private placement to eligible purchasers (the “ Notes Offering ”). The final terms and amounts of the Notes are subject to market and other conditions and may be materially different than expectations. If (i) the c…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

Termination of a Material Agreement. On March 14, 2025, in accordance with the indenture dated as of June 9, 2021, among the Company, certain of the Company’s subsidiaries as guarantors (the “ 2026 Guarantors ”) and the Trustee (as amended, the “ 2026 Notes Indenture ”), the Company caused to be irrevocably deposited with the Trustee sufficient funds to fund the 2026 Notes Redemption. After the deposit of such funds, the 2026 Notes Indenture was satisfied and discharged in accordance with its…

Chief Accounting Officer — Lara Kroll: The filing discloses the internal promotion of a long-tenured employee to the role of Chief Accounting Officer, which is a standard succession event rather than a departure.

Entry into a Material Definitive Agreement. Indenture for 6.750% Senior Notes due 2033 On March 13, 2025, Chord Energy Corporation (the “ Company ”) completed its previously announced offering of $750 million in aggregate principal amount of its 6.750% senior unsecured notes due 2033 (the “ Notes ”), which are fully and unconditionally guaranteed on a senior unsecured basis by certain of the Company’s subsidiaries (collectively, the “ Guarantors ”). The terms of the Notes are governed by the…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

Other Events. On March 3, 2025, the Company entered into a Purchase Agreement (the “ Purchase Agreement ”), among the Company, the subsidiary guarantors named therein (the “ Guarantors ”), and Wells Fargo Securities, LLC (the “ Representative ”), as representative of the several initial purchasers (the “ Initial Purchasers ”), pursuant to which the Company agreed to issue and sell to the Initial Purchasers $750 million in aggregate principal amount of the Company’s new 6.750% senior unsecured…

Regulation FD Disclosure. Proposed Notes Offering and Concurrent Tender Offer On March 3, 2025, Chord Energy Corporation (the “ Company, ” “ we ,” or “ our ”) announced that it has commenced an offering of $750 million aggregate principal amount of new senior unsecured notes due 2033 (the “ New Notes ”) in a private placement to eligible purchasers (the “ Notes Offering ”), and a concurrent cash tender offer (the “ Tender Offer ”) to purchase any and all of the $400 million outstanding aggreg…

by reference. Cautionary Note Regarding Forward-Looking Statements The information in this Current Report on Form 8-K includes “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. All statements, other than statements of historical fact included in this Current Report on Form 8-K, including statements regarding the Notes Offering and the use of proceeds therefrom, the Tender Offer and the timing and outcome thereof, any rede…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

Entry into a Material Definitive Agreement On November 4, 2024, Chord Energy Corporation (the “Company”) (i) completed the semi-annual borrowing base redetermination, which affirmed the current borrowing base of $3.0 billion and the aggregate elected revolving commitment amounts of $1.5 billion and (ii) with respect to the Amended and Restated Credit Agreement dated as of July 1, 2022 , by and among the Company, Oasis Petroleum North America LLC, a Delaware limited liability company, Wells Fa…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth in

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

OF THIS CURRENT REPORT, INCLUDING EXHIBIT 99.1 ATTACHED HERETO, SHALL NOT BE DEEMED “FILED” FOR THE PURPOSES OF SECTION 18 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, NOR SHALL IT BE DEEMED INCORPORATED BY REFERENCE INTO ANY REGISTRATION STATEMENT OR OTHER FILING PURSUANT TO THE SECURITIES ACT OF 1933, AS AMENDED, EXCEPT AS OTHERWISE EXPRESSLY STATED IN SUCH FILING. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this repor…

Completion of Acquisition or Disposition of Assets. As discussed in the Introductory Note to this Current Report on Form 8-K, on March 31, 2024, the Company completed its previously announced strategic business combination transaction with Enerplus pursuant to the terms of the Arrangement Agreement. The information set forth in the Introductory Note of this Current Report on Form 8-K is incorporated by reference into this