Diamondback Energy (FANG)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-02-03 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Diamondback Energy, Inc. (FANG) CIK: 0001539838 --- Reporting Owner --- Name: SGF FANG Holdings, LP CIK: 0002080063 Role: 10%+ Owner --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-02-03 | Code: S (Open market sale) Shares: -1,000,000 | Price: $162.88 Total Value: $162,880,000.00 Shares Owned After: 98,686,727 | Ownership: D (Direct) Footnotes: [F1] 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 1,000,000 shares of common stock to the Company on February 3, 2026 at the February 3, 2026 closing price of the common stock on Nasdaq and an additional 1,000,000 shares of common stock to the Company on February 4, 2026 at the February 4, 2026 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. [Transaction #2] Security: Common Stock Date: 2026-02-04 | Code: S (Open market sale) Shares: -1,000,000 | Price: $168.99 Total Value: $168,990,000.00 Shares Owned After: 97,686,727 | Ownership: D (Direct) Footnotes: [F1] 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 1,000,000 shares of common stock to the Company on February 3, 2026 at the February 3, 2026 closing price of the common stock on Nasdaq and an additional 1,000,000 shares of common stock to the Company on February 4, 2026 at the February 4, 2026 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. --- Footnotes (Complete Index) --- F1: 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 1,000,000 shares of common stock to the Company on February 3, 2026 at the February 3, 2026 closing price of the common stock on Nasdaq and an additional 1,000,000 shares of common stock to the Company on February 4, 2026 at the February 4, 2026 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. --- Signature --- /s/ /s/ Kevin T. Keen, Attorney in fact (2026-02-05)