{"schema_version":"secwatch.filing_event.v1","accession":"0000776867-25-000009","form_type":"8-K","ticker":"WTM","cik":"0000776867","company_name":"WHITE MOUNTAINS INSURANCE GROUP LTD","filed_at":"2025-07-07T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.353097+00:00","generated_at":"2026-05-18T09:23:40.689456+00:00","sec_items":["1.01","9.01"],"event_type":"m_and_a","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"White Mountains acquires 51% controlling interest in Distinguished Programs for $230M","bullets":["Acquisition includes existing ~1% interest; total cash consideration ~$230M for 51% controlling stake.","Distinguished places >$550M in annual premium across 12 specialty P&C programs (real estate, cyber, surety, etc.).","Current management (Bill Malloy, Jason Rotman, Steve Sitterly) to remain as significant equityholders.","Sellers can sell additional 29% units 3 years after close for ~$130M; White Mountains has parallel call at 1.35x price.","Expected close Q3 2025, subject to regulatory approvals; no financing condition or shareholder vote required."],"urls":{"canonical":"https://secwatch.observer/filing/0000776867-25-000009","json":"https://secwatch.observer/filing/0000776867-25-000009.json","markdown":"https://secwatch.observer/filing/0000776867-25-000009.md","text":"https://secwatch.observer/filing/0000776867-25-000009.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/776867/000077686725000009/0000776867-25-000009-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/776867/000077686725000009/wtm-20250704.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-18T09:23:40.689456+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"}