Skip to main content
WHITE MOUNTAINS INSURANCE GROUP LTD logo

WHITE MOUNTAINS INSURANCE GROUP LTD — Investor Relations & Filings

Ticker · WTM ISIN · BMG9618E1075 LEI · 549300N3FL068JERBG02 US Financial and insurance activities
Open in API
Filings indexed 1,038 across all filing types
Latest filing 2025-10-03 Regulatory Filings
Country BM Bermuda
Listing US WTM

About WHITE MOUNTAINS INSURANCE GROUP LTD

https://www.whitemountains.com/

White Mountains Insurance Group is a holding company that acquires and manages businesses and assets within the insurance and related financial services sectors. The company's strategy focuses on opportunistic, value-oriented acquisitions and patient, long-term investment. It utilizes a permanent capital base to provide enduring support and build partnerships with the owners and management teams of its portfolio companies. Through its subsidiaries, the company's operations include property and casualty insurance and reinsurance, municipal bond insurance, and providing capital solutions for asset and wealth management firms.

Recent filings

Filing Released Lang Actions
8-K
Regulatory Filings Classification · 95% confidence The document is a Form 8-K filed with the SEC, which is a Current Report used to announce major events or material definitive agreements. The text describes the entry into a material definitive agreement (a securities purchase agreement) related to the sale of a significant equity interest in a subsidiary. It includes details about the transaction, forward-looking statements, and references to exhibits such as the SPA and a press release. There are no financial statements or detailed financial data presented, and the document is not an annual or quarterly report. It is not a proxy, earnings release, or other specific report type. The Form 8-K is a regulatory filing used to disclose material events promptly. Therefore, the appropriate classification is Regulatory Filings (RNS). The document length (11,194 characters) and content confirm it is a full Form 8-K filing, not just an announcement of a report, so it is not RPA. Confidence is high due to the clear identification of the form and content.
2025-10-03 English
8-K
M&A Activity Classification · 100% confidence The document is a Form 8-K filed with the SEC, dated September 2, 2025, reporting the closing of an acquisition transaction where White Mountains Insurance Group acquired a controlling interest in another company. The content focuses on a specific corporate event related to M&A activity, specifically the acquisition of a controlling interest. There are no financial statements or detailed financial performance data, so it is not an Annual Report or Interim Report. The document is not a proxy, voting result, or management change announcement. The key event is an acquisition closing, which fits the M&A Activity category. The document length is under 5,000 characters and contains substantive event information, not just an announcement of a report publication or certification. Therefore, the correct classification is M&A Activity (TAR).
2025-09-03 English
8-K
Board/Management Information Classification · 100% confidence The document is a Form 8-K filed with the SEC, dated September 2, 2025, for White Mountains Insurance Group, Ltd. The key content is under Item 5.02, which announces the departure and appointment of senior officers including the CEO, CFO, and President. It details the retirement of the current CEO and the succession plan for these key management roles. There is no financial data or report content, only management changes and related agreements. This fits the category of Board/Management Information (MANG), which covers announcements of changes in the company's board of directors or senior management. The document length is 6772 characters, sufficient to contain substantive information about management changes. Therefore, the classification is MANG with high confidence.
2025-09-02 English
Regulatory Filings 2025
Regulatory Filings
2025-08-27 English
Regulatory Filings 2025
Regulatory Filings
2025-08-11 English
Major Shareholding Notification 2025
Major Shareholding Notification
2025-08-08 English

Browse filings by year

18 years

Report missing filing

Can't find a specific document? Let us know and we'll add it within 24 hours.

We will notify you once the filing is added.
Report sent
Thank you. We will check the data and update it shortly.