FANG · Quarterly Report (Form 10-Q) · Filed November 5, 2025

Diamondback Energy Inc — 10-Q exhibit

q32025diamondback10-qxex321.htm

Diamondback Energy Inc on Boardroom Alpha

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EXHIBIT 32.1

CERTIFICATION OF PERIOD REPORT

In connection with the Quarterly Report on Form 10-Q of Diamondback Energy, Inc. (the "Company"), as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, the undersigned, Kaes Van't Hof, Chief Executive Officer of Diamondback Energy, Inc., certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that, to the best of my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.



Date:	November 5, 2025	/s/ Kaes Van't Hof
		Kaes Van't Hof
		Chief Executive Officer

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