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WHITE MOUNTAINS INSURANCE GROUP LTD

For the period ended Dec 31, 2025. Filed Feb 27, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 27, 2026

WTM$2,256.20+0.7%Stored close · as of Nov 9, 2026

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Contents

ITEM 8. Financial Statements and Supplementary Data

The financial statements and supplementary data have been filed as a part of this Annual Report on Form 10-K as indicated in the Index to Consolidated Financial Statements and Financial Statement Schedules appearing on page 109 of this report.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.