White Mountains Insurance Group, Ltd. is a financial services holding company. The Company operates through four segments: Ark/WM Outrigger, HG Global/BAM, Kudu and Bamboo. The Ark/WM Outrigger segment is engaged in specialty property and casualty insurance and reinsurance business that offers a range of niche insurance and reinsurance products, including property, specialty, marine and energy, accident and health, and casualty. The HG Global/BAM segment is engaged in the mutual municipal bond insurance business in the United States. The Kudu segment provides capital solutions for boutique asset and wealth managers for a variety of purposes including generational ownership transfers, management buyouts, acquisition and growth finance and legacy partner liquidity. The Bamboo segment includes capital-light, tech- and data-enabled insurance distribution platform, which provides homeowners' insurance and related products to the residential property market in California.