{"schema_version":"secwatch.filing_event.v1","accession":"0000776867-25-000016","form_type":"8-K","ticker":"WTM","cik":"0000776867","company_name":"WHITE MOUNTAINS INSURANCE GROUP LTD","filed_at":"2025-09-03T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.354099+00:00","generated_at":"2026-05-17T08:41:26.406419+00:00","sec_items":["8.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"White Mountains closes $224M acquisition of 50% of Distinguished Programs, now holds 51% control","bullets":["Closed acquisition of 50% of AQ Phoenix Parent, L.P. (Distinguished Programs) for $224M in cash on Sept. 2, 2025.","Combined with existing ~1% interest, White Mountains now owns a 51% controlling interest in Distinguished Programs.","Transaction closed via indirect wholly owned subsidiaries WM Monroe Holdings, Inc. and WM Phoenix GP, LLC.","No additional financing or regulatory conditions disclosed post-closing."],"urls":{"canonical":"https://secwatch.observer/filing/0000776867-25-000016","json":"https://secwatch.observer/filing/0000776867-25-000016.json","markdown":"https://secwatch.observer/filing/0000776867-25-000016.md","text":"https://secwatch.observer/filing/0000776867-25-000016.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/776867/000077686725000016/0000776867-25-000016-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/776867/000077686725000016/wtm-20250902.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T08:41:26.406419+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"}