Diamondback Energy (FANG)

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-20 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: Diamondback Energy, Inc. (FANG) CIK: 0001539838 --- Reporting Owner --- Name: Van't Hof Matthew Kaes CIK: 0001704666 Role: Director, Officer (Chief Executive Officer) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-08-20 | Code: S (Open market sale) Shares: -9,500 | Price: $214.64 Total Value: $2,039,080.00 Shares Owned After: 116,440 | Ownership: D (Direct) Footnotes: [F1] The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $214.015 per share to $215.01 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnote 2. [Transaction #2] Security: Common Stock Date: 2026-08-20 | Code: S (Open market sale) Shares: -500 | Price: $215.06 Total Value: $107,528.00 Shares Owned After: 115,940 | Ownership: D (Direct) Footnotes: [F2] The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $215.045 per share to $215.07 per share, inclusive. --- Footnotes (Complete Index) --- F1: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $214.015 per share to $215.01 per share, inclusive. The reporting person undertakes to provide to Diamondback Energy, Inc., any security holder of Diamondback Energy, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote and in footnote 2. F2: The price reported in Column 4 is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $215.045 per share to $215.07 per share, inclusive. --- Signature --- /s/ /s/ Matt Zmigrosky, as attorney-in-fact for Matthew Kaes Van't Hof (2026-08-24)