---
schema_version: "secwatch.filing_event.v1"
accession: "0001520006-23-000029"
form_type: "8-K"
ticker: "MTDR"
cik: "0001520006"
company_name: "Matador Resources Co"
filed_at: "2023-02-16T23:59:59+00:00"
generated_at: "2026-06-19T09:17:32.588063+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Matador Resources promotes Brian J. Willey to CFO, effective Feb 16, 2023

## Summary
- Brian J. Willey promoted to CFO, President of Midstream Operations and Executive Vice President.
- Michael D. Frenzel steps down as principal financial officer but remains EVP and Treasurer.
- Willey previously served as President & General Counsel of Midstream Operations and President of San Mateo Midstream.
- Willey joined Matador in 2014; background includes accounting, law, and Baker Botts.

## SEC filing metadata
- accession: 0001520006-23-000029
- form_type: 8-K
- ticker: MTDR
- cik: 0001520006
- company_name: Matador Resources Co
- filed_at: 2023-02-16T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1520006/000152000623000029/0001520006-23-000029-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1520006/000152000623000029/mtdr-20230216.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001520006-23-000029
- JSON: https://secwatch.observer/filing/0001520006-23-000029.json
- Plain text: https://secwatch.observer/filing/0001520006-23-000029.txt

## Key facts
- Executive change
  Michael D. Frenzel departed as Chief Financial Officer at Matador Resources Co.
  - Action: stepped down
  - Role: Chief Financial Officer
  source text: As Chief Financial Officer, Mr. Willey will assume the role of principal financial officer from Michael D. Frenzel, who will continue as an Executive Vice President and the Treasurer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000623000029/0001520006-23-000029-index.htm
- Executive change
  Brian J. Willey changed role as Chief Financial Officer at Matador Resources Co.
  - Action: promoted
  - Role: Chief Financial Officer
  source text: Matador Resources Company (the “Company”) today announced the promotion of Brian J. Willey to Chief Financial Officer, President of Midstream Operations and Executive Vice President, effective as of February 16, 2023.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000623000029/0001520006-23-000029-index.htm

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