SCHEDULE 13D/A 0001104659-21-138202 0001283718 XXXXXXXX LIVE 5 Common Stock, par value $0.01 01/30/2026 false 0001509589 17888H103 CIVITAS RESOURCES, INC.

555 17th Street Suite 3700 Denver CO 80202

Pierre Abinakle, CPPIB 416-868-4075 CPPIB Crestone Peak Resources Canada Inc One Queen Street East, Suite 2500 Toronto A6 M5C 2W5 0001283718 N Canada Pension Plan Investment Board OO N Z4 0 0 0 0 0 N 0 CO 0001891248 N CPPIB Crestone Peak Resources Canada Inc. OO N Z4 0 0 0 0 0 N 0 CO Common Stock, par value $0.01 CIVITAS RESOURCES, INC. 555 17th Street Suite 3700 Denver CO 80202 Item 4 of the Schedule 13D is hereby amended and supplemented as follows: SM Energy Merger On January 30, 2026 (the "Closing Date"), pursuant to the Agreement and Plan of Merger (as it may be amended from time to time, the "Merger Agreement") dated as of November 2, 2025, by and among the Issuer, SM Energy Company ("SM Energy"), and Cars Merger Sub, Inc., a direct wholly owned subsidiary of SM Energy ("Merger Sub"), (i) Merger Sub merged with and into the Issuer, with the Issuer surviving as a wholly owned subsidiary of SM Energy (the "First Merger"), and (ii) immediately following the First Merger, the Issuer merged with and into SM Energy, with SM Energy continuing as the surviving corporation (the "Second Merger" and, together with the First Company Merger, the "Mergers"). Immediately following the First Merger, each eligible share of Issuer Common Stock (the "Common Stock") was converted automatically into the right to receive 1.45 shares of SM Energy common stock, with cash paid in lieu of the issuance of any fractional shares of SM Energy common stock. Item 5 of the Schedule 13D is hereby amended and restated in its entirety as follows: As of the Closing Date, the Reporting Persons do not beneficially own any shares of Common Stock. The information set forth in Item 5(a) of this Schedule 13D is hereby incorporated herein by reference. Except as described herein, none of the Reporting Persons nor, to the Reporting Persons' knowledge, any of the Covered Persons, has effected any transaction during the past 60 days in the Issuer's Common Stock. None. As of the Closing Date, the Reporting Persons ceased to be the beneficial owners of more than five percent of the outstanding Common Stock. Canada Pension Plan Investment Board /s/ Pierre Abinakle 02/03/2026 CPPIB Crestone Peak Resources Canada Inc. /s/ Brian Savage 02/03/2026