White Mountains Insurance Group, Ltd., through its subsidiaries, provides insurance and other financial services in the United States. The company operates through HG Global/BAM, Ark/WM Outrigger, Kudu, and Other Operations segments. The HG Global/BAM segment provides insurance on municipal bonds issued to finance public purposes, such as schools, utilities, and transportation facilities, as well as reinsurance protection services. The Ark/WM Outrigger segment offers reinsurance and insurance, including property, marine and energy, accident and health, casualty, and specialty products.