{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-26-000044","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2026-04-20T23:59:59+00:00","discovered_at":"2026-05-14T18:02:33.962410+00:00","generated_at":"2026-05-15T05:26:35.767978+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Arch Capital boosts share repurchase authorization by $3.0B; $3.1B now available","bullets":["Board authorized $3.0B increase in share repurchase program; $3.1B now available for buybacks.","Repurchases may be effected in open market or private transactions depending on market conditions.","Program timing and amount depend on market conditions, corporate and regulatory considerations."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-26-000044","json":"https://secwatch.observer/filing/0000947484-26-000044.json","markdown":"https://secwatch.observer/filing/0000947484-26-000044.md","text":"https://secwatch.observer/filing/0000947484-26-000044.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000044/0000947484-26-000044-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000044/acgl-20260419.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-15T05:26:35.767978+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"}