{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-24-000060","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2024-04-29T23:59:59+00:00","discovered_at":"2026-05-14T18:03:22.579763+00:00","generated_at":"2026-06-03T06:07:44.992276+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"positive","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"Arch Capital Q1 net income $1.1B ($2.92/sh) vs $705M ($1.87) YoY; combined ratio improves to 78.8%","bullets":["Net income available to common shareholders $1.1B, $2.92 per diluted share vs $705M, $1.87 in Q1 2023.","After-tax operating income $933M ($2.45/sh) vs $654M ($1.73) YoY; annualized operating ROE 20.7%.","Gross premiums written $5.93B (+24.1% YoY); net premiums earned $3.42B (+18.7%).","Combined ratio 78.8% (ex-cat & prior-year dev: 80.8%) vs 80.6% a year ago; underwriting income $736M.","Book value per share $49.36, up 5.2% from Dec 31, 2023; favorable prior-year reserve development $126M."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-24-000060","json":"https://secwatch.observer/filing/0000947484-24-000060.json","markdown":"https://secwatch.observer/filing/0000947484-24-000060.md","text":"https://secwatch.observer/filing/0000947484-24-000060.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000060/0000947484-24-000060-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000060/acgl-20240429.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T06:07:44.992276+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":"3a33858f29ef3a7d5ef092c1a78d19742b696ce4","claim":"ARCH CAPITAL GROUP LTD. reported financial results for the quarter ended March 31, 2024.","evidence_excerpt":"On April 29, 2024, Arch Capital Group Ltd. issued a press release reporting its earnings and the availability of its financial supplement for the quarter ended March 31, 2024.","evidence_source":"SEC 8-K Item 2.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000060/0000947484-24-000060-index.htm","confidence":0.9,"family_label":"Earnings Releases","details":[{"label":"Period","value":"the quarter ended March 31, 2024"},{"label":"Result","value":"reported results"}],"fact_type":"earnings_release"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}