{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-26-000094","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2026-06-03T12:47:07+00:00","discovered_at":"2026-06-03T12:50:00.418315+00:00","generated_at":"2026-06-03T12:50:12.794896+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.55,"calibrated_materiality_score":0.55,"confidence":"high","headline":"Arch Capital expands Maamoun Rajeh's role to sole President; David Gansberg departs","bullets":["David Gansberg steps down as President immediately and is departing the Company.","Maamoun Rajeh adds oversight of Insurance segment to existing Reinsurance and Mortgage responsibilities.","Rajeh, already President since November 2024, continues to report to CEO Nicolas Papadopoulo.","No new equity awards granted to Rajeh in connection with expanded role; employment terms unchanged.","Rajeh joined Arch in 2001 and previously served as CEO of Arch's Global Reinsurance Group."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-26-000094","json":"https://secwatch.observer/filing/0000947484-26-000094.json","markdown":"https://secwatch.observer/filing/0000947484-26-000094.md","text":"https://secwatch.observer/filing/0000947484-26-000094.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/0000947484-26-000094-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/acgl-20260603.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T12:50:12.794896+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":"4335f9c2c3","claim":"David Gansberg departed as President at ARCH CAPITAL GROUP LTD..","evidence_excerpt":"David Gansberg is stepping down from his role as a President of Arch effective immediately and will be departing the Company following a distinguished tenure","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/0000947484-26-000094-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"stepping down"},{"label":"Role","value":"President"}],"fact_type":"executive_change"},{"claim_id":"e4bea51693","claim":"Maamoun Rajeh changed role as President at ARCH CAPITAL GROUP LTD..","evidence_excerpt":"the expansion of Maamoun Rajeh's role as President. Mr. Rajeh, who currently oversees Arch's Reinsurance and Mortgage segments, will also take on responsibility for Arch's Insurance segment","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000094/0000947484-26-000094-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"expansion of role"},{"label":"Role","value":"President"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}