---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-112325"
form_type: "8-K"
ticker: "FANG"
cik: "0001539838"
company_name: "Diamondback Energy, Inc."
filed_at: "2026-09-30T20:05:28+00:00"
generated_at: "2026-10-12T14:04:31.484527+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Diamondback Energy amends stockholders agreement; two directors resign from board

## Summary
- 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.

## SEC filing metadata
- accession: 0001104659-26-112325
- form_type: 8-K
- ticker: FANG
- cik: 0001539838
- company_name: Diamondback Energy, Inc.
- filed_at: 2026-09-30T20:05:28+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 1.01, 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1539838/000110465926112325/0001104659-26-112325-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1539838/000110465926112325/tm2626600d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-112325
- JSON: https://secwatch.observer/filing/0001104659-26-112325.json
- Plain text: https://secwatch.observer/filing/0001104659-26-112325.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.