{"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","discovered_at":"2026-05-14T18:02:48.588495+00:00","generated_at":"2026-05-19T08:07:26.503928+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Matador Resources promotes Bryan Erman to Co-President; William Lambert named CFO effective June 11","bullets":["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."],"urls":{"canonical":"https://secwatch.observer/filing/0001520006-25-000156","json":"https://secwatch.observer/filing/0001520006-25-000156.json","markdown":"https://secwatch.observer/filing/0001520006-25-000156.md","text":"https://secwatch.observer/filing/0001520006-25-000156.txt","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"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-19T08:07:26.503928+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"1fdd1553e3","claim":"Bryan A. Erman changed role as Co-President, Chief Legal Officer and Head of M&A at Matador Resources Co.","evidence_excerpt":"Bryan A. Erman has been promoted to Co-President, Chief Legal Officer and Head of M&A of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Co-President, Chief Legal Officer and Head of M&A"}],"fact_type":"executive_change"},{"claim_id":"21ce759081","claim":"William D. Lambert changed role as Executive Vice President, Chief Financial Officer and Head of Strategy at Matador Resources Co.","evidence_excerpt":"William D. Lambert has been promoted to Executive Vice President, Chief Financial Officer and Head of Strategy of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Executive Vice President, Chief Financial Officer and Head of Strategy"}],"fact_type":"executive_change"},{"claim_id":"8ffbb97a4b","claim":"Benjamin T. Colodney changed role as Vice President and Chief Accounting Officer at Matador Resources Co.","evidence_excerpt":"Benjamin T. Colodney has been promoted to Vice President and Chief Accounting Officer of the Company.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Vice President and Chief Accounting Officer"}],"fact_type":"executive_change"},{"claim_id":"bae9714900","claim":"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.","evidence_excerpt":"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_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Executive Vice President – Administration and Finance of the Company and Executive Vice President and Chief Financial Officer of San Mateo"}],"fact_type":"executive_change"},{"claim_id":"f6e6fd622f","claim":"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.","evidence_excerpt":"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_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1520006/000152000625000156/0001520006-25-000156-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"promoted"},{"label":"Role","value":"Executive Vice President – Midstream of the Company and Executive Vice President, Chief Administrative Officer and Chief Legal Officer of San Mateo Midstream, LLC"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}