White Mountains Insurance ( (WTM) ) has released its Q3 earnings. Here is a breakdown of the information White Mountains Insurance presented to its investors.
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White Mountains Insurance Group, Ltd., a Bermuda-domiciled financial services holding company, operates primarily in the insurance and reinsurance sectors, offering a diverse portfolio of services and investments. The company is listed on the New York Stock Exchange and the Bermuda Stock Exchange.
In its latest earnings report, White Mountains Insurance Group announced a 3% increase in book value per share for the third quarter of 2025, reaching $1,851. The company also highlighted a strategic move with the sale of a 77% equity interest in Bamboo to CVC Capital Partners, which is expected to significantly boost its book value per share.
Key financial metrics from the report include Ark’s impressive 76% combined ratio and $366 million in gross written premiums for the quarter. HG Global saw a 3% growth in book value, while Kudu achieved a 9% return on equity over the past 12 months. Bamboo reported a record quarter with strong growth in managed premiums and adjusted EBITDA. The company’s consolidated investment portfolio, excluding MediaAlpha, rose by 2%.
Looking ahead, White Mountains is optimistic about its financial position, with the Bamboo transaction expected to increase its undeployed capital to $1.1 billion. The company remains focused on leveraging its strategic investments and partnerships to drive future growth and shareholder value.

