X0508 4 2025-11-28 0001539838 Diamondback Energy, Inc. FANG 0002080063 SGF FANG Holdings, LP C/O SGF CAPITAL LLC, KEVIN T. KEEN 8111 DOUGLAS AVE., SUITE 1200 DALLAS TX 75225 true 0002021141 Greth Lyndal C/O SGF CAPITAL LLC, KEVIN T. KEEN 8111 DOUGLAS AVENUE, SUITE 1200 DALLAS TX 75225 true false Common Stock 2025-11-28 4 S 0 2000000 152.59 D 99686727 D Pursuant to a letter agreement, dated November 28, 2025, by and between Diamondback Energy, Inc., a Delaware corporation (the "Company"), and SGF FANG Holdings, LP, a Delaware limited partnership ("SGF FANG"), SGF FANG sold 2,000,000 shares of common stock to the Company at the November 28, 2025 closing price of the common stock on Nasdaq. Mrs. Greth is the ultimate beneficial owner of the shares held of record by SGF FANG and indirectly controls SGF Capital, LLC, its general partner. /s/ Kevin T. Keen, Attorney in fact 2025-12-02