{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-24-000154","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2024-12-20T23:59:59+00:00","discovered_at":"2026-05-14T18:03:11.464038+00:00","generated_at":"2026-05-29T00:48:33.277538+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 renews $1.0B share repurchase authorization, replacing prior program","bullets":["New $1.0B buyback authorization replaces existing program; open market or private transactions allowed.","As of Sept 30, 2024, ~$1.0B remained under prior authorization; no shares repurchased Oct 1–Dec 13.","Program allows repurchases at management’s discretion with no expiration date specified."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-24-000154","json":"https://secwatch.observer/filing/0000947484-24-000154.json","markdown":"https://secwatch.observer/filing/0000947484-24-000154.md","text":"https://secwatch.observer/filing/0000947484-24-000154.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000154/0000947484-24-000154-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000154/acgl-20241220.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-29T00:48:33.277538+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"}