secwatch.observer — SEC 8-K summary ====================================== Issuer: Diamondback Energy, Inc. (FANG) CIK: 0001539838 Form: 8-K Filed at: 2026-09-30T20:05:28+00:00 Accession: 0001104659-26-112325 Event type: leadership Sentiment: neutral Materiality: 0.55 Item codes: 1.01, 5.02, 9.01 LLM model: deepseek-v4.1-flash:cloud@v2 Diamondback Energy amends stockholders agreement; two directors resign from board -------------------------------------------------------------------------------- - Diamondback Energy and SGF FANG Holdings, LP signed a First Amendment to the Sept. 10, 2024 Stockholders Agreement on Sept. 29, 2026. - The amendment permanently reduces Stephens Majority board designation rights to two directors if Stephens Stockholders own at least 10% but less than 25% of Outstanding Shares, and none if below 10%. - Darin Holderness resigned from Diamondback's board on Sept. 29, 2026, and Lance Robertson resigned on Sept. 30, 2026, in connection with a Board Stepdown, not due to disagreement. - The First Amendment is filed as Exhibit 10.1; certain information was redacted under Item 601(a)(6) of Regulation S-K. - Diamondback common stock trades on Nasdaq under ticker FANG. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/1539838/000110465926112325/0001104659-26-112325-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/1539838/000110465926112325/tm2626600d1_8k.htm HTML page: https://secwatch.observer/filing/0001104659-26-112325 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer