secwatch.observer — SEC 8-K summary ====================================== Issuer: WHITE MOUNTAINS INSURANCE GROUP LTD (WTM) CIK: 0000776867 Form: 8-K Filed at: 2026-06-05T12:17:36+00:00 Accession: 0001628280-26-041051 Event type: other_material Sentiment: neutral Materiality: 0.10 Item codes: 7.01, 9.01 LLM model: deepseek-v4-flash:cloud@v2 White Mountains holds annual investor meeting; no material financial details in 8-K filing -------------------------------------------------------------------------------- - 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. Source: EDGAR index: https://www.sec.gov/Archives/edgar/data/776867/000162828026041051/0001628280-26-041051-index.htm Primary doc: https://www.sec.gov/Archives/edgar/data/776867/000162828026041051/wtm-20260605.htm HTML page: https://secwatch.observer/filing/0001628280-26-041051 License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer