White Mountains Q4 BVPS +18%, full-year +25%; Bamboo sale adds ~$320

WHITE MOUNTAINS INSURANCE GROUP LTD

2025-FY EPS reported $430.14 revenue$3,735,000,000

Book value per share $2,188 at Dec 31, 2025, up 18% QoQ and 25% YoY including dividends.
Comprehensive income $837M in Q4 and $1,109M full-year 2025 vs. losses of $131M and $230M in prior year.
Ark combined ratio 79% Q4 (10 pts cat) and 83% full-year; GWP +16% to $2.6B.
Closed sale of Bamboo to CVC for net cash $848M; retained 15% equity stake valued at $250M.
Repurchased ~$190M of shares in Q4 via open market and self-tender; undeployed capital ~$1.0B.

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