{"schema_version":"secwatch.filing_event.v1","accession":"0001628280-26-041051","form_type":"8-K","ticker":"WTM","cik":"0000776867","company_name":"WHITE MOUNTAINS INSURANCE GROUP LTD","filed_at":"2026-06-05T12:17:36+00:00","discovered_at":"2026-06-05T12:20:00.309892+00:00","generated_at":"2026-06-05T12:20:16.326260+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.1,"calibrated_materiality_score":0.1,"confidence":"low","headline":"White Mountains holds annual investor meeting; no material financial details in 8-K filing","bullets":["Filing reports use of investor presentation at June 5, 2026 Annual Investor Information Meeting.","Exhibit 99.1 is the presentation; its content was not included in the public filing text.","No specific financial data, guidance, or strategic changes are disclosed in this 8-K."],"urls":{"canonical":"https://secwatch.observer/filing/0001628280-26-041051","json":"https://secwatch.observer/filing/0001628280-26-041051.json","markdown":"https://secwatch.observer/filing/0001628280-26-041051.md","text":"https://secwatch.observer/filing/0001628280-26-041051.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/776867/000162828026041051/0001628280-26-041051-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/776867/000162828026041051/wtm-20260605.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-05T12:20:16.326260+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"}