{"schema_version":"secwatch.filing_event.v1","accession":"0000776867-23-000012","form_type":"8-K","ticker":"WTM","cik":"0000776867","company_name":"WHITE MOUNTAINS INSURANCE GROUP LTD","filed_at":"2023-08-07T23:59:59+00:00","discovered_at":"2026-05-14T18:03:36.636182+00:00","generated_at":"2026-06-12T05:13:28.105213+00:00","sec_items":["2.02","9.01"],"event_type":"earnings","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"White Mountains reports 1% ABVPS increase in Q2; Ark GWP up 50% YoY","bullets":["Book value per share $1,532; adjusted book value per share $1,576 as of June 30, 2023.","Ark combined ratio 89%; gross written premiums $606M (+50% YoY); risk-adjusted rate change +21%.","MediaAlpha share price decline reduced ABVPS by 2%; tender offer for 5.9M shares at $10.00 completed.","BAM gross written premiums & MSC down to $26M in Q2 from $41M last year; pricing up to 77 bps.","Total consolidated portfolio return excluding MediaAlpha: 3.0%; repurchased 5,542 shares for $7M."],"urls":{"canonical":"https://secwatch.observer/filing/0000776867-23-000012","json":"https://secwatch.observer/filing/0000776867-23-000012.json","markdown":"https://secwatch.observer/filing/0000776867-23-000012.md","text":"https://secwatch.observer/filing/0000776867-23-000012.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/776867/000077686723000012/0000776867-23-000012-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/776867/000077686723000012/wtm-20230807.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-12T05:13:28.105213+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"}