White Mountains: Bamboo divestiture lifts BVPS, strengthens capital and enables selective redeployment

Balance-sheet lift from Bamboo divestiture strengthens White Mountains

White Mountains Insurance Group reports a marked increase in book value per share (BVPS), driven chiefly by the sale of its Bamboo business and solid underwriting and investment performance. The company posts a BVPS of $2,188 as of Dec. 31, 2025, up about 18% in the fourth quarter and 25% for the full year including dividends. Management attributes roughly $816 million of net gain from the Bamboo sale to the rise, which adds roughly $320 to BVPS for 2025.

The transaction bolsters comprehensive income, which is $837 million for the fourth quarter and $1.109 billion for the full year, versus $(131) million and $230 million in comparable 2024 periods. White Mountains cites strong operating results across its insurance platforms and positive investment returns as complementary drivers of capital growth. The company is reporting results that materially strengthen its balance sheet and capital position entering 2026.

Executives signal that the improved capital base supports ongoing strategic priorities, including selective capital redeployment and continued investment in underwriting platforms. With greater book value per share and a healthier comprehensive income stream, White Mountains is positioned to pursue growth in its specialty insurance businesses while maintaining capacity for opportunistic transactions, share repurchases and potential new investments, the company says.

Underwriting platforms show robust momentum

Ark Re posts an 83% combined ratio for the year and generates $2.6 billion of gross written premiums, up 16% year-on-year, while HG Global produces $61 million of gross written premiums led by a record year at BAM. Kudu records a 13% return on equity and grows the fair value of its participation contract portfolio by 8% on a same-store basis. Distinguished reports managed premiums of $145 million for the quarter across scaled and growth programs.

Capital deployment, taxes and liquidity overview

White Mountains repurchases roughly $190 million of shares during the quarter, including a self-tender, and recognizes a $73 million net deferred tax expense in the fourth quarter related to reversal of a Bermuda economic transition asset ($51 million at Ark, $22 million at HG Global). Following Luxembourg’s Pillar II legislation, the company no longer expects to utilize that adjustment. Undeployed capital, including a January distribution from WM Outrigger Re, stands at about $1.0 billion by company statement.