Chord Energy Corp

The information set forth below is included herein for the purpose of providing the disclosure required under “Item 1.01 – Entry into a Material Definitive Agreement.” of Form 8-K.

Amendment to Credit Facility

On October 30, 2026, the Company entered into an eighth amendment (the “Eighth Amendment”) to that certain 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 Fargo Bank, N.A., as administrative agent, and the other parties party thereto (the “Credit Facility”). In connection with entry into the Eighth Amendment, the semi-annual redetermination of the Company’s borrowing base under the Credit Agreement was completed on October 30, 2026, which reaffirmed the borrowing base and the aggregate elected commitment at $2.75 billion and $2.0 billion, respectively. Pursuant to the Eighth Amendment, the maturity date of the Credit Facility was extended from November 3, 2029 to October 30, 2031, subject to a springing maturity date that is 91 days prior to the scheduled maturity date of the 2030 Senior Notes if, on such date, (i) more than $100.0 million in aggregate principal amount of the 2030 Senior Notes remains outstanding (excluding any 2030 Senior Notes that have been satisfied and discharged or defeased) and (ii) the utilization of the total revolving commitments under the Credit Facility, calculated on a pro forma basis, exceeds 80%. The Eighth Amendment also increased thresholds and caps with respect to certain ratios and added a new basket. Additionally, certain other provisions were updated to reflect current market practice.

The foregoing description of the Eighth Amendment to the Credit Agreement is a summary only, does not purport to be complete, and is qualified in its entirety by reference to the full text of the Eighth Amendment, which is attached hereto as Exhibit 10.1 and incorporated by reference into this Item 5.

Rule 10b5-1 trading arrangements.

During the fiscal quarter ended September 30, 2026, none of our directors or officers (as defined in Rule 16a-1 under the Exchange Act)adopted orterminated a “Rule 10b5-1 trading arrangement” or “non-Rule 10b5-1 trading arrangement,” as each term is defined in Item 408 of Regulation S-K.