{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-25-000004","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2025-02-06T23:59:59+00:00","discovered_at":"2026-05-14T18:03:06.910982+00:00","generated_at":"2026-05-27T02:14:49.886013+00:00","sec_items":["5.02","8.01","9.01"],"event_type":"leadership","sentiment":"positive","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Arch Capital appoints Alexander Moczarski, former Marsh McLennan Chairman, to board effective Feb 4, 2025","bullets":["Alexander Moczarski appointed as Class III director effective February 4, 2025.","Mr. Moczarski served as Chairman of Marsh McLennan International with 45+ years of insurance experience.","He held leadership roles at Guy Carpenter, Marsh McLennan, and AIG.","Will receive standard non-employee director compensation (cash and equity).","Board Chair John Pasquesi and CEO Nicolas Papadopoulo cited his global perspective and experience."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-25-000004","json":"https://secwatch.observer/filing/0000947484-25-000004.json","markdown":"https://secwatch.observer/filing/0000947484-25-000004.md","text":"https://secwatch.observer/filing/0000947484-25-000004.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748425000004/0000947484-25-000004-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748425000004/acgl-20250204.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-27T02:14:49.886013+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":"55b8c2ff9f","claim":"Alexander Moczarski was appointed as Director at ARCH CAPITAL GROUP LTD..","evidence_excerpt":"On February 4, 2025, Arch Capital Group Ltd.’s (“ACGL”) Board of Directors (“Board”) unanimously approved the appointment of Alexander Moczarski to serve as a Class III director of the Board, effective February 4, 2025.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/947484/000094748425000004/0000947484-25-000004-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}