{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-053913","form_type":"8-K","ticker":"WTM","cik":"0000776867","company_name":"WHITE MOUNTAINS INSURANCE GROUP LTD","filed_at":"2026-08-06T12:14:20+00:00","discovered_at":"2026-08-06T12:15:00.361373+00:00","generated_at":"2026-08-06T12:15:18.001334+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"White Mountains Q2 book value per share up 4% to $2,258; Ark combined ratio 84%","bullets":["Book value per share $2,258, up 4% in Q2; comprehensive income $199M.","Ark combined ratio 84% in Q2; gross written premiums $778M, down 5% YoY due to property softening.","Kudu Q2 total revenues $69M, pre-tax income $57M, adjusted EBITDA $16M; trailing 12-month ROE 15%.","HG Global refinanced senior debt to $200M at 7.4% fixed; paid $93M dividend ($90M to White Mountains).","Repurchased 91,194 shares for $191M at avg $2,092.72 (93% of book value); undeployed capital ~$0.8B."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-053913","json":"https://secwatch.observer/filing/0001628280-26-053913.json","markdown":"https://secwatch.observer/filing/0001628280-26-053913.md","text":"https://secwatch.observer/filing/0001628280-26-053913.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/776867/000162828026053913/0001628280-26-053913-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/776867/000162828026053913/wtm-20260806.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-08-06T12:15:18.001334+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"}