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2026-01-202026-04-23
News · 26 weeks420%
2025-10-262026-04-19
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Latest news
25 items- SECWhite Mountains Insurance Group Ltd. filed SEC Form 8-K: Other Events, Financial Statements and Exhibits8-K - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- PRWHITE MOUNTAINS PARTNERS ANNOUNCES ACQUISITION OF BASESIXNEW YORK, April 1, 2026 /PRNewswire/ -- White Mountains Partners ("WMP"), a White Mountains operating company, announced today that it has acquired a majority interest in BaseSix Systems LLC ("Basesix" or the "Company"), a provider of building systems integration and aftermarket service. Founded in 2018 and headquartered in Marietta, Georgia, Basesix provides the design, installation, retrofit, maintenance, and repair of mission critical, low voltage building systems for commercial and institutional customers across the fire & life safety, network & wireless, security & access control, and audio-visual disciplines. John Daly, White Mountains Partners' CEO and Managing Partner, said, "Bases
- SECSEC Form DEF 14A filed by White Mountains Insurance Group Ltd.DEF 14A - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- SECAmendment: SEC Form SCHEDULE 13G/A filed by White Mountains Insurance Group Ltd.SCHEDULE 13G/A - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Subject)
- INSIDERSEC Form 4 filed by Seelig Robert Lawrence4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERDirector Tanner David Allen gifted 225 shares, decreasing direct ownership by 11% to 1,879 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERChief Executive Officer Caffrey Liam P was granted 1,500 shares, increasing direct ownership by 70% to 3,650 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERPresident Harrison Giles E was granted 775 shares, increasing direct ownership by 41% to 2,675 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERMD & Chief Accounting Officer Hildreth Michaela was granted 600 shares, increasing direct ownership by 49% to 1,825 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERChief Financial Officer Papamichael Michael A was granted 500 shares, increasing direct ownership by 71% to 1,200 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDEREVP & General Counsel Seelig Robert Lawrence was granted 775 shares, increasing direct ownership by 45% to 2,500 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- SECSEC Form 10-K filed by White Mountains Insurance Group Ltd.10-K - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- SECWhite Mountains Insurance Group Ltd. filed SEC Form 8-K: Other Events, Financial Statements and Exhibits8-K - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- PRBishop Street Underwriters Announces Strategic Investment by White MountainsNEW YORK, Feb. 26, 2026 (GLOBE NEWSWIRE) -- Bishop Street Underwriters ("Bishop Street"), a RedBird Capital Partners portfolio company, today announced that it has completed a strategic structured capital investment of $125 million by White Mountains Insurance Group, Ltd. ("White Mountains") (NYSE:WTM). "We are thrilled to welcome White Mountains as a strategic growth partner during a period of unprecedented momentum," said Chad Levine, Chief Executive Officer of Bishop Street Underwriters. "Bishop Street's 2025 performance - surpassing $650 million in gross written premium and industry leading organic growth while maintaining a stellar sub-50 percent portfolio loss ratio - validates our
- SECSEC Form 13F-HR filed by White Mountains Insurance Group Ltd.13F-HR - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- SECWhite Mountains Insurance Group Ltd. filed SEC Form 8-K: Results of Operations and Financial Condition, Financial Statements and Exhibits8-K - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- PRWHITE MOUNTAINS REPORTS FOURTH QUARTER RESULTSHAMILTON, Bermuda, Feb. 6, 2026 /PRNewswire/ -- White Mountains Insurance Group, Ltd. (NYSE:WTM) reported book value per share of $2,188 as of December 31, 2025, an increase of 18% for the fourth quarter of 2025 and 25% for the year ended December 31, 2025, including dividends. Liam Caffrey, CEO, commented, "We had an excellent year, with BVPS growth of 18% in the quarter and 25% for the year. The largest contributor in both periods was the net gain from our sale of Bamboo, which added roughly $320 to BVPS in 2025. We also benefitted from solid results at our operating companies and good investment returns. For the year, Ark produced an 83% combined ratio and $2.6 billion of gross writte
- SECWhite Mountains Insurance Group Ltd. filed SEC Form 8-K: Other Events8-K - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Filer)
- INSIDERMD & Chief Accounting Officer Hildreth Michaela covered exercise/tax liability with 274 shares, decreasing direct ownership by 10% to 2,491 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERChief Financial Officer Papamichael Michael A covered exercise/tax liability with 131 shares, decreasing direct ownership by 15% to 772 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERNew insider Papamichael Michael A claimed ownership of 1,615 shares (SEC Form 3)3 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDEREVP & General Counsel Seelig Robert Lawrence covered exercise/tax liability with 398 shares, decreasing direct ownership by 2% to 17,907 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- INSIDERChief Executive Officer Caffrey Liam P covered exercise/tax liability with 425 shares, decreasing direct ownership by 20% to 1,655 units (SEC Form 4)4 - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Issuer)
- SECAmendment: SEC Form SC TO-I/A filed by White Mountains Insurance Group Ltd.SC TO-I/A - WHITE MOUNTAINS INSURANCE GROUP LTD (0000776867) (Subject)
- PRWhite Mountains Announces Final Results of Its Tender OfferHAMILTON, Bermuda, Dec. 24, 2025 /PRNewswire/ -- White Mountains Insurance Group, Ltd. (NYSE:WTM) announced today the final results of its "modified Dutch auction" tender offer. The tender offer expired at 12:00 midnight, New York City time, at the end of the day on December 19, 2025. Based on the final count by the depositary for the tender offer, 64,064 shares were properly tendered and not properly withdrawn at or below the final purchase price of $2,050.00 per share. The Company is purchasing all validly tendered shares for approximately $131.3 million. The shares purchased in the tender offer represent approximately 2.5% of White Mountains's shares outstanding as of November 19, 2025.