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AI brief of an SEC Form 8-K · Matador Resources (MTDR)

Matador Resources names Robert T. Macalik CFO, succeeding William D. Lambert

Neutral Impact 4 of 5 leadership Written later

Matador Resources promoted Robert T. Macalik to Executive Vice President and Chief Financial Officer effective September 29, 2025, succeeding William D. Lambert, who ceased serving as CFO on September 24, 2025. The company said Lambert's departure is not related to any financial or accounting issue or any disagreement with the company. Macalik will also remain CFO of midstream joint venture San Mateo Midstream, LLC.

Key points

  • Robert T. Macalik promoted to EVP and CFO, effective September 29, 2025.
  • William D. Lambert ceased serving as CFO on September 24, 2025; company says the departure is not related to any financial or accounting issue or disagreement.
  • Macalik joined Matador in July 2015 as Vice President and Chief Accounting Officer and most recently served as EVP – Administration and Finance.
  • Macalik entered an employment agreement with MRC Energy Company, a wholly-owned subsidiary, effective September 29, 2025.

The filing

CompanyMatador Resources (MTDR)
Form8-K, current report
Filed with the SECSep 30, 2025, 6:40 AM ET
Accession number0001520006-25-000210

Items reported: 5.02 Director / Officer Change7.01 Regulation FD Disclosure

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 12:58 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on September 30, 2025.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.