{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-25-000071","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2025-09-05T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.755514+00:00","generated_at":"2026-05-17T08:11:23.337984+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"Arch Capital boosts share repurchase authority by $2.0B, total available ~$2.3B","bullets":["Authorization increased by $2.0B on Sept. 4, 2025, bringing total available to ~$2.3B.","Includes recent Q3 2025 repurchases; timing and amount depend on market conditions.","Repurchases may be executed in open market or privately negotiated transactions.","Program depends on corporate and regulatory factors."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-25-000071","json":"https://secwatch.observer/filing/0000947484-25-000071.json","markdown":"https://secwatch.observer/filing/0000947484-25-000071.md","text":"https://secwatch.observer/filing/0000947484-25-000071.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748425000071/0000947484-25-000071-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748425000071/acgl-20250904.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T08:11:23.337984+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":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}