{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-26-000010","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2026-02-09T23:59:59+00:00","discovered_at":"2026-05-14T18:02:38.097443+00:00","generated_at":"2026-05-16T04:01:19.063977+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"positive","materiality_score":0.8,"calibrated_materiality_score":0.8,"confidence":"high","headline":"Arch Capital Q4 net income $1.2B ($3.35 EPS) vs $925M ($2.42) YoY; combined ratio 80.6%","bullets":["Net income $1.2B ($3.35 diluted EPS) vs $925M ($2.42) in Q4 2024; after-tax operating income $1.1B ($2.98 EPS).","Combined ratio 80.6% improved from 85.0% YoY; ex-cat and prior year development ratio 79.5% vs 79.0%.","Book value per share $65.11, up 4.5% from Sept 30; share repurchases of $798M.","Gross premiums written $4.8B (+1.1% YoY); net premiums earned $4.3B (+2.7%)."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-26-000010","json":"https://secwatch.observer/filing/0000947484-26-000010.json","markdown":"https://secwatch.observer/filing/0000947484-26-000010.md","text":"https://secwatch.observer/filing/0000947484-26-000010.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000010/0000947484-26-000010-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748426000010/acgl-20260209.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T04:01:19.063977+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"}