---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-21-343714"
form_type: "8-K"
ticker: "FANG"
cik: "0001539838"
company_name: "Diamondback Energy, Inc."
filed_at: "2021-11-30T23:59:59+00:00"
generated_at: "2026-06-28T04:50:46.157432+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Diamondback Energy EVP Russell Pantermuehl to retire Dec 31; Barkmann and Cho promoted

## Summary
- Russell Pantermuehl retires as EVP & Chief Engineer effective Dec 31, 2021; will serve as consultant through Dec 2022 at $4k/month.
- Unvested equity awards continue to vest during consulting period; forfeited after expiration.
- Al Barkmann promoted to SVP Reservoir Engineering, assumes many of Pantermuehl's duties.
- Yong Cho promoted to SVP Drilling; both report to EVP Danny Wesson.
- Pantermuehl joined Diamondback in Aug 2011 before IPO; eligible for 2021 annual bonus.

## SEC filing metadata
- accession: 0001193125-21-343714
- form_type: 8-K
- ticker: FANG
- cik: 0001539838
- company_name: Diamondback Energy, Inc.
- filed_at: 2021-11-30T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1539838/000119312521343714/0001193125-21-343714-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1539838/000119312521343714/d246321d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-21-343714
- JSON: https://secwatch.observer/filing/0001193125-21-343714.json
- Plain text: https://secwatch.observer/filing/0001193125-21-343714.txt

## Key facts
- Executive change
  Russell Pantermuehl retired as Executive Vice President and Chief Engineer at Diamondback Energy, Inc..
  - Action: retired
  - Role: Executive Vice President and Chief Engineer
  source text: Russell Pantermuehl, Diamondback’s Executive Vice President and Chief Engineer and a named executive officer in Diamondback’s definitive proxy statement on Schedule 14A filed on April 23, 2021 (the “Proxy Statement”), will be retiring from his current role at Diamondback effective as of December 31, 2021 (the “Retirement Date”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1539838/000119312521343714/0001193125-21-343714-index.htm

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