{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-22-124895","form_type":"8-K","ticker":"AM","cik":"0001623925","company_name":"Antero Midstream Corp","filed_at":"2022-12-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:51.477344+00:00","generated_at":"2026-06-21T08:55:06.099751+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Antero Midstream appoints Nancy E. Chisholm to Board as Class III director","bullets":["Appointment effective December 5, 2022; Chisholm also joins Audit and ESG Committees.","Board determined Chisholm meets NYSE independence standards; no disclosable transactions.","Chisholm will receive standard non-employee director compensation as described in proxy.","Company entered into standard indemnification agreement with Chisholm."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-22-124895","json":"https://secwatch.observer/filing/0001104659-22-124895.json","markdown":"https://secwatch.observer/filing/0001104659-22-124895.md","text":"https://secwatch.observer/filing/0001104659-22-124895.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1623925/000110465922124895/0001104659-22-124895-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1623925/000110465922124895/tm2232050d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-21T08:55:06.099751+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":"100c8dad89","claim":"Nancy E. Chisholm was appointed as Class III Director at Antero Midstream Corp.","evidence_excerpt":"On December 6, 2022, Antero Midstream Corporation (the “Company”) announced that its board of directors (the “Board”), upon the recommendation of its Nominating and Governance Committee, appointed Nancy E. Chisholm to the Board as a Class III director, effective as of December 5, 2022.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1623925/000110465922124895/0001104659-22-124895-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Class III Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}