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Dec 31, 2025
White Mountains Q4 2025 Earnings Report
Reported strong fourth quarter results driven by a major divestiture and solid operating performance.
Key Takeaways
White Mountains delivered an exceptional Q4 2025, highlighted by a significant increase in net income and book value per share, largely driven by the sale of Bamboo and solid underwriting and investment results across core operations.
Book value per share increased 18% in Q4 2025 to $2,187.97.
Net income attributable to common shareholders reached $835.8 million in the quarter.
The sale of Bamboo generated a substantial net gain and strengthened capital position.
Ark and WM Outrigger reported strong combined ratios despite catastrophe losses.
Revenue by Segment
Forward Guidance
Management expressed confidence in continued disciplined growth, capital deployment opportunities, and solid underwriting performance into 2026.
Positive Outlook
- Strong capital position with approximately $1.0 billion of undeployed capital.
- Ark expects continued underwriting opportunities despite a softening rate environment.
- HG Global anticipates continued strength in municipal issuance.
- Kudu positioned for sustained growth with an expanded participation portfolio.
- Improved financial flexibility following the Bamboo divestiture.
Challenges Ahead
- Exposure to catastrophe losses remains a risk.
- Investment returns may be volatile due to market conditions.
- Regulatory and tax changes could impact future results.
- Softening insurance pricing environment may pressure margins.
Historical Earnings Impact
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Avg. Return Before/After Earnings
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