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White Mountains Insurance Group Ltd. documents

White Mountains Insurance Group (WTM) annual report: the 10-K filed 27 February 2026 for the year ended 31 December 2025. Proxy statement (DEF 14A) filed 1 April 2026; latest 10-Q filed 6 August 2026 for the quarter ended 30 June 2026. Each links to the document on EDGAR, with 4 earnings press releases.

Earnings press releases (exhibit 99 to each results 8-K)

FiledDocumentOpenWhere
6 August 2026Results press release, exhibit 99 to the 8-K filed 6 August 2026The releaseEDGAR folder
6 May 2026Results press release, exhibit 99 to the 8-K filed 6 May 2026The releaseEDGAR folder
6 February 2026Results press release, exhibit 99 to the 8-K filed 6 February 2026The releaseEDGAR folder
6 November 2025Results press release, exhibit 99 to the 8-K filed 6 November 2025The releaseEDGAR folder

Annual reports (10-K)

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27 February 202610-K, period ended 31 December 2025The documentEDGAR folder

Quarterly reports (10-Q)

FiledDocumentOpenWhere
6 August 202610-Q, period ended 30 June 2026The documentEDGAR folder
6 May 202610-Q, period ended 31 March 2026The documentEDGAR folder
6 November 202510-Q, period ended 30 September 2025The documentEDGAR folder

Proxy statements

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1 April 2026DEF 14A, period ended 21 May 2026The documentEDGAR folder

Annual report to shareholders

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1 April 2026ARS, period ended 31 December 2025The documentEDGAR folder

Employee plan reports

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30 June 202611-K, period ended 31 December 2025The documentEDGAR folder