{"schema_version":"secwatch.filing_event.v1","accession":"0000947484-24-000063","form_type":"8-K","ticker":"ACGL","cik":"0000947484","company_name":"ARCH CAPITAL GROUP LTD.","filed_at":"2024-05-01T23:59:59+00:00","discovered_at":"2026-05-14T18:03:22.579989+00:00","generated_at":"2026-06-03T03:50:18.758001+00:00","sec_items":["7.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"medium","headline":"Arch Capital completes sale of Castel Underwriting to Ryan Specialty","bullets":["Castel Underwriting Agencies Limited sold to a Ryan Specialty subsidiary on May 1, 2024.","Castel is a London-based managing general underwriting platform.","Financial terms of the transaction were not disclosed in the filing."],"urls":{"canonical":"https://secwatch.observer/filing/0000947484-24-000063","json":"https://secwatch.observer/filing/0000947484-24-000063.json","markdown":"https://secwatch.observer/filing/0000947484-24-000063.md","text":"https://secwatch.observer/filing/0000947484-24-000063.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000063/0000947484-24-000063-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/947484/000094748424000063/acgl-20240501.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-03T03:50:18.758001+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"}