---
schema_version: "secwatch.filing_event.v1"
accession: "0001520006-25-000156"
form_type: "8-K"
ticker: "MTDR"
cik: "0001520006"
company_name: "Matador Resources Co"
filed_at: "2025-06-13T23:59:59+00:00"
generated_at: "2026-05-19T08:07:26.503928+00:00"
event_type: "leadership"
sentiment: "positive"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Matador Resources promotes Bryan Erman to Co-President; William Lambert named CFO effective June 11

## Summary
- Bryan Erman promoted to Co-President, Chief Legal Officer and Head of M&A; previously EVP, GC and Head of M&A.
- William Lambert named EVP, CFO and Head of Strategy, replacing Brian Willey as principal financial officer.
- Brian Willey moves to EVP – Midstream of Matador and EVP, CAO and CLO of San Mateo Midstream.
- Robert Macalik promoted to EVP – Administration and Finance of Matador and EVP, CFO of San Mateo.
- Benjamin Colodney promoted to VP and Chief Accounting Officer, succeeding Macalik.

## SEC filing metadata
- accession: 0001520006-25-000156
- form_type: 8-K
- ticker: MTDR
- cik: 0001520006
- company_name: Matador Resources Co
- filed_at: 2025-06-13T23:59:59+00:00
- event_type: leadership
- sentiment: positive
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/mtdr-20250611.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001520006-25-000156
- JSON: https://secwatch.observer/filing/0001520006-25-000156.json
- Plain text: https://secwatch.observer/filing/0001520006-25-000156.txt

## Key facts
- Executive change
  Bryan A. Erman changed role as Co-President, Chief Legal Officer and Head of M&A at Matador Resources Co.
  - Action: promoted
  - Role: Co-President, Chief Legal Officer and Head of M&A
  source text: Bryan A. Erman has been promoted to Co-President, Chief Legal Officer and Head of M&A of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm
- Executive change
  William D. Lambert changed role as Executive Vice President, Chief Financial Officer and Head of Strategy at Matador Resources Co.
  - Action: promoted
  - Role: Executive Vice President, Chief Financial Officer and Head of Strategy
  source text: William D. Lambert has been promoted to Executive Vice President, Chief Financial Officer and Head of Strategy of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm
- Executive change
  Benjamin T. Colodney changed role as Vice President and Chief Accounting Officer at Matador Resources Co.
  - Action: promoted
  - Role: Vice President and Chief Accounting Officer
  source text: Benjamin T. Colodney has been promoted to Vice President and Chief Accounting Officer of the Company.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm
- Executive change
  Robert T. Macalik changed role as Executive Vice President – Administration and Finance of the Company and Executive Vice President and Chief Financial Officer of San Mateo at Matador Resources Co.
  - Action: promoted
  - Role: Executive Vice President – Administration and Finance of the Company and Executive Vice President and Chief Financial Officer of San Mateo
  source text: Robert T. Macalik has been promoted to Executive Vice President – Administration and Finance of the Company and Executive Vice President and Chief Financial Officer of San Mateo.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm
- Executive change
  Brian J. Willey changed role as Executive Vice President – Midstream of the Company and Executive Vice President, Chief Administrative Officer and Chief Legal Officer of San Mateo Midstream, LLC at Matador Resources Co.
  - Action: promoted
  - Role: Executive Vice President – Midstream of the Company and Executive Vice President, Chief Administrative Officer and Chief Legal Officer of San Mateo Midstream, LLC
  source text: Brian J. Willey has been promoted to Executive Vice President – Midstream of the Company and Executive Vice President, Chief Administrative Officer and Chief Legal Officer of San Mateo Midstream, LLC
  evidence_url: https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm

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