{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-23-000131","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2023-11-30T23:59:59+00:00","discovered_at":"2026-05-14T18:03:32.484557+00:00","generated_at":"2026-06-07T20:10:31.124081+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Arch Capital director Thomas R. Watjen resigns from board effective Dec. 31, 2023","bullets":["Director Thomas R. Watjen informed Arch Capital of his resignation from the Board of Directors.","Resignation is effective December 31, 2023.","No replacement has been announced; Board thanks Watjen for his service.","Watjen's departure is voluntary; no known disagreement cited."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-23-000131","json":"https://secwatch.observer/filing/0000947484-23-000131.json","markdown":"https://secwatch.observer/filing/0000947484-23-000131.md","text":"https://secwatch.observer/filing/0000947484-23-000131.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748423000131/0000947484-23-000131-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748423000131/acgl-20231127.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T20:10:31.124081+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":"618891d7a4","claim":"Thomas R. Watjen resigned as director at ARCH CAPITAL GROUP LTD..","evidence_excerpt":"Arch Capital Group Ltd. (the “Company”) director, Thomas R. Watjen, has informed the Company of his decision to resign from the Company’s Board of Directors, effective December 31, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/947484/000094748423000131/0000947484-23-000131-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"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"}