WHITE MOUNTAINS INSURANCE GROUP LTD

White Mountains Insurance Group, Ltd. acquires and operates businesses and assets within the insurance, financial services, and related industries. The company conducts operations primarily across property and casualty insurance and reinsurance, municipal bond guarantee reinsurance, capital solutions for wealth and asset managers, and specialty insurance distribution. Key product lines include specialty property, casualty, marine and energy, aviation, and accident and health coverages, alongside catastrophe reinsurance and structured financing solutions. Its offerings serve primary insurers, commercial enterprises, financial institutions, and specialized firms through independent brokers, wholesalers, and managing general agents.

The enterprise maintains major operating subsidiaries and underwriting activities in the United Kingdom and Bermuda, writing select insurance and reinsurance risks on a global scale. In the United Kingdom, operations run through corporate memberships and managing agents at Lloyd's of London, while worldwide property, casualty, and catastrophe reinsurance are supported through Bermuda-domiciled platforms. White Mountains is headquartered in Hamilton, Bermuda, and maintains its principal executive office in Hanover, New Hampshire.

Summary of the business section of White Mountains Insurance's latest annual report, written by StockData.

“Actually paid” adjusts reported pay for changes in the value of equity awards. Shareholder return assumes $100 invested at the start of the measurement period, as disclosed by the company.

“As of December 31, 2025, White Mountains employed 1,648 people (consisting of 85 people at the Company, WM Capital, its other intermediate holding companies, WM Advisors, WTM Partners and HG Global, 300 people at Ark, 17 people at Kudu, 288 people at Distinguished and 958 people at its consolidated Other Operating Businesses).”