Welcome to our dedicated page for White Mountains SEC filings (Ticker: WTM), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The White Mountains Insurance Group, Ltd. (WTM) SEC filings page on Stock Titan provides direct access to the company’s U.S. regulatory disclosures, including Forms 10‑K, 10‑Q and 8‑K. As a Bermuda‑domiciled financial services holding company with common shares listed on the New York Stock Exchange and the Bermuda Stock Exchange, White Mountains files detailed reports describing its property and casualty insurance and reinsurance activities, municipal bond reinsurance operations, capital solutions for asset and wealth management firms, insurance distribution platforms and other investments.
In its annual reports on Form 10‑K and quarterly reports on Form 10‑Q, White Mountains presents consolidated financial statements, segment information for businesses such as Ark/WM Outrigger, HG Global, Kudu, Bamboo, Distinguished and Other Operations, and discussions of book value per share, comprehensive income and risk factors. These filings also describe exposures to catastrophic events, reserve adequacy considerations, investment portfolio performance and the impact of holdings such as MediaAlpha.
Current reports on Form 8‑K capture material events affecting WTM. Recent examples include the renewal of Outrigger Re Ltd., a collateralized reinsurance sidecar providing quota share protection on a portion of Ark Bermuda’s global property catastrophe portfolio; the entry into and closing of transactions to acquire a controlling interest in Distinguished Programs; the sale of a controlling financial interest in the Bamboo Group to affiliates of funds advised by CVC Capital Partners while retaining an indirect equity interest; announcements of quarterly results and non‑GAAP segment metrics; and disclosures regarding executive leadership changes.
On Stock Titan, these filings are updated as they are posted to EDGAR and are accompanied by AI‑powered summaries that highlight key points, such as segment performance, transaction terms, capital deployment, and changes in book value per share. Users can quickly scan 10‑K and 10‑Q reports for segment‑level trends, review 8‑K filings for acquisitions, dispositions, tender offers and governance changes, and examine how White Mountains describes risks related to catastrophes, reinsurance capacity, rating agency actions and regulatory developments. The platform also surfaces insider‑related disclosures contained in periodic and current reports, helping investors understand how management and the board respond to evolving conditions in the insurance and financial services markets.
White Mountains Insurance Group, Ltd. has filed Amendment No. 2 to its issuer tender offer statement, serving as the final amendment reporting the results of its completed self‑tender offer. The offer sought to purchase up to $300 million in value of its issued and outstanding common shares at prices between $1,850 and $2,050 per share, payable in cash, less any applicable withholding taxes and without interest. The amendment notes that, on December 24, 2025, the company issued a press release announcing the final results of the offer, which is included as an exhibit.
White Mountains Insurance Group Ltd. executive Wesley C. Bell, the MD & Chief Accounting Officer, reported a stock transaction dated December 23, 2025. He disposed of 60 common shares, coded as a "G" transaction, at a reported price of $0, indicating a gift or similar transfer. Following this activity, he beneficially owns 2,165 common shares directly, plus 1,825 restricted common shares directly and 20 common shares held indirectly through a 401(k) account. An accompanying note explains that the 401(k) position reflects the accumulation of 2 common shares in his company retirement account based on a plan report dated December 22, 2025.
White Mountains Insurance Group Ltd director reported a stock sale of company shares. On 12/19/2025, the reporting person sold 5,000 common shares in a transaction coded "S" (sale) at a price of $2,050 per share. After this sale, the director beneficially owned 10,440 common shares directly. In addition, 119 common shares were held indirectly through a 401(k) plan. The filing is submitted as a Form 4/A amendment for an earlier report dated 12/22/2025 and reflects the director’s updated ownership position.
White Mountains Insurance Group Ltd. reported an insider share transaction by a company director. On 12/19/2025, the reporting person sold 5,000 common shares of the company, coded as a sale transaction. The reported sale price per share is $0. Following this transaction, the director beneficially owns 10,440 common shares directly and an additional 119 shares indirectly through a 401(k) plan. The filing is made by a single reporting person who serves as a director of White Mountains Insurance Group Ltd.
White Mountains Insurance Group's chief executive officer and director reported an insider sale of 5,000 common shares on 12/19/2025 at a price of $2,050 per share. Following this transaction, the insider directly owned 13,809 common shares and 5,425 restricted common shares, plus 122 common shares held indirectly through a 401(k) account. The 401(k) balance reflects the accumulation of 2 additional common shares based on a plan report dated as of December 20, 2025.
White Mountains Insurance Group, Ltd. has filed an amendment to its issuer tender offer for its common shares. The company is offering to repurchase up to $300 million of its outstanding shares for cash at a price not greater than $2,050 nor less than $1,850 per share, subject to the terms in the Offer to Purchase and Letter of Transmittal. The amendment notes that the offer expired at 12:00 midnight, New York City time, on December 19, 2025, and that the company issued a press release on December 22, 2025 announcing preliminary results of the offer, which is included as a new exhibit.
White Mountains Insurance Group Ltd reported that a director disposed of 165 common shares on 12/16/2025, leaving 1,568 shares beneficially owned in direct form.
The transaction is coded "S" in the filing and lists a price of $2,048.51 for the common shares. The report is filed for one reporting person and identifies the filer’s relationship to the company as a director.
White Mountains Insurance Group completed a major divestiture of its Bamboo business. On December 5, 2025, a wholly owned subsidiary sold approximately 77.3% of its equity interest in WM Pierce Holdings, Inc. and its subsidiaries, including Bamboo Ide8 Insurance Services, LLC, to affiliates of funds advised by CVC Capital Partners under a securities purchase agreement dated October 2, 2025.
The transaction generated net cash proceeds at closing of $848 million, while White Mountains retained an indirect equity interest in the Bamboo Group valued at $250 million. The company also prepared and filed unaudited pro forma condensed consolidated financial statements to show how this sale would have affected its balance sheet as of September 30, 2025 and its results of operations for the nine months ended September 30, 2025 and the year ended December 31, 2024.
White Mountains Insurance Group Ltd. (WTM) director reported a small change in personal holdings. On 11/25/2025, the reporting person disposed of 50 common shares at a stated price of $0 under transaction code "G," which typically indicates a gift. Following this transaction, the reporting person beneficially owns 15,440 common shares directly and 119 common shares indirectly through a 401(k) plan. The filing covers only non-derivative equity and shows no derivative securities activity.
White Mountains Insurance Group Ltd filed a Form 13F disclosing institutional holdings with a reported Form 13F Information Table Value Total of $203,208,267.
The report lists 1 information table entry and is signed by Michaela J. Hildreth, Managing Director and Chief Accounting Officer, on 11-13-2025.