Welcome to our dedicated page for White Mountains news (Ticker: WTM), a resource for investors and traders seeking the latest updates and insights on White Mountains stock.
White Mountains Insurance Group, Ltd. (NYSE: WTM, BSX: WTM.BH) is a Bermuda‑domiciled financial services holding company active in property and casualty insurance and reinsurance, municipal bond reinsurance, capital solutions for asset and wealth management firms and property and casualty insurance distribution. The news flow around White Mountains reflects both its operating performance and its capital allocation decisions across these areas.
On this page, readers can follow company announcements such as quarterly and year‑to‑date financial results, where White Mountains reports book value per share, comprehensive income attributable to common shareholders and segment performance for Ark/WM Outrigger, HG Global, Kudu, Bamboo, Distinguished and other operations. These releases often discuss combined ratios, gross written premiums, investment gains and losses and non‑GAAP metrics used to evaluate specific platforms.
White Mountains also issues news about strategic transactions and corporate actions. Recent examples in its public disclosures include a modified Dutch auction self‑tender offer for its common shares, the acquisition of 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 stake, and participation in a strategic investment in BroadStreet Partners. Leadership and governance updates, such as planned changes in the Chief Executive Officer, President and Chief Financial Officer roles, are also communicated through press releases and related Form 8‑K filings.
Investors and analysts can use the WTM news feed to monitor how White Mountains manages catastrophe exposures through Ark and WM Outrigger Re, how HG Global and its municipal bond reinsurance activities are performing, how Kudu’s capital solutions portfolio is evolving and how the company’s investment in MediaAlpha affects reported results. Regularly reviewing these updates can provide insight into White Mountains’ operating trends, transaction activity and capital management over time.
White Mountains (NYSE: WTM) reported book value per share $2,188 as of Dec 31, 2025, up 18% in Q4 and 25% for 2025, including dividends. The Bamboo sale materially contributed, adding roughly $320 to BVPS in 2025. Comprehensive income was $837M in Q4 and $1,109M for the year. The company repurchased about $190M of shares in Q4 and reports roughly $1.0B of undeployed capital (including a WM Outrigger distribution received in January). Other notable items include Ark gross written premiums of $2.6B (+16% YoY), Kudu 13% ROE for 2025, and a $73M deferred tax expense reversal in Q4 related to the Bermuda economic transition adjustment.
White Mountains (NYSE: WTM) announced final results of its modified Dutch auction tender offer that expired December 19, 2025. The company accepted 64,064 shares at a final purchase price of $2,050.00 per share, for an aggregate purchase of approximately $131.3 million. The purchased shares represent approximately 2.5% of White Mountains's shares outstanding as of November 19, 2025.
Payment will be made promptly and the company expects to have approximately 2,479,677 common shares outstanding immediately after payment. Shareholders may contact D.F. King & Co. for additional information; dealer managers were BofA Securities and Barclays Capital.
White Mountains (NYSE: WTM) announced preliminary results of a modified Dutch auction tender offer to buy up to $300 million of common shares, which expired December 19, 2025.
Based on a preliminary depositary count, 67,186 shares were validly tendered at or below the purchase price of $2,050 per share, including 16,589 shares via guaranteed delivery. The company expects to purchase those shares for approximately $137.7 million, representing about 2.6% of shares outstanding as of November 19, 2025.
Results and the final purchase price are preliminary and subject to confirmation by the depositary and completion of the guaranteed delivery period; final results and payment will be announced promptly after confirmation.
White Mountains (NYSE: WTM) announced on December 8, 2025 that it has completed the sale of a controlling interest in Bamboo to affiliates of funds advised by CVC Capital Partners.
White Mountains will continue to hold an approximately 15% fully-diluted equity stake in Bamboo following the transaction.
White Mountains (NYSE: WTM) commenced a modified Dutch auction self-tender offer to purchase up to $300 million in value of its common shares in cash at a price between $1,850 and $2,050 per share.
The offer opened on November 21, 2025 and expires at 12:00 midnight New York City time on December 19, 2025, unless extended. Shares closed at $1,881.61 on November 20, 2025. If fully subscribed, the company could buy ~146,341 shares (5.8%) at $2,050 or ~162,162 shares (6.4%) at $1,850. The offer is not conditioned on financing or a minimum tender and permits withdrawal prior to expiration.
White Mountains (NYSE: WTM) reported book value per share $1,851 as of Sept 30, 2025, up 3% in Q3 and 6% year-to-date including dividends. White Mountains agreed on Oct 2, 2025 to sell ~77% of Bamboo to CVC, and expects the transaction to add ~$325 per share, bringing pro forma BVPS to $2,176 as of Sept 30, 2025. Q3 comprehensive income attributable to common shareholders was $114M. Ark, HG Global, Kudu and Bamboo reported quarter-over-quarter growth across premiums, underwriting results and investment gains, while MediaAlpha investment gains were smaller versus prior year.
White Mountains (NYSE: WTM) signed a definitive agreement to sell a controlling interest in Bamboo to funds advised by CVC, valuing Bamboo at $1.75 billion. White Mountains expects a gain of approximately $310 to its book value per share and net cash proceeds of about $840 million. Post-closing White Mountains will retain an approximately 15% fully-diluted equity stake in Bamboo valued at $250 million based on the transaction. The deal is expected to close by the end of Q4 2025, subject to regulatory approvals and customary closing conditions; the closing is not subject to a financing condition.
Bamboo Ide8 Insurance Services, a subsidiary of White Mountains Insurance Group (NYSE: WTM), has partnered with Accredited to launch their new E&S Signature program in Texas, supported by a multi-year sidecar transaction through Greenshoots Re Ltd.
The sidecar, initially established in early 2025, represents a strategic expansion of Bamboo's reinsurance capabilities. CEO John Chu highlighted Greenshoots Re as a strategic differentiator providing flexible, long-term capital access for both new and existing programs. GC Securities acted as the sole structuring and placement agent, with Willkie Farr & Gallagher as deal counsel.
White Mountains Insurance Group (NYSE: WTM) has announced significant leadership changes effective January 1, 2026. Liam Caffrey, currently President and CFO, will become CEO and join the Board, succeeding Manning Rountree, who will retire but continue as Senior Advisor through January 2028.
The transition includes additional executive appointments: Michael Papamichael will become CFO, and Giles Harrison will assume the role of President. Caffrey, who joined as CFO in 2022, brings extensive experience from Aon PLC and McKinsey & Company. The Board has unanimously approved these leadership changes, expressing confidence in the company's future direction.
White Mountains Insurance Group (NYSE: WTM) reported strong Q2 2025 results with a 3% increase in book value per share to $1,804. The company posted comprehensive income of $124 million for Q2 2025, compared to a loss of $55 million in Q2 2024.
Key highlights include Ark's 85% combined ratio and $815 million in gross written premiums (up 17% YoY), HG Global's record Q2 with $19 million in gross written premiums, and MediaAlpha's 19% share price increase. The investment portfolio, excluding MediaAlpha, grew by 2.3%. The company announced strategic acquisitions of Distinguished Programs and completed the BroadStreet Partners transaction, leaving approximately $300 million in undeployed capital.