White Mountains Insurance Group Ltd. is a financial services holding company, which engages in property and casualty insurance and reinsurance. It operates through the following segments: OneBeacon, HG Global/BAM and Other Operations. The OneBeacon segment consists of specialty property and casualty insurance writer that offer insurance products through independent agencies, regional and national brokers, wholesalers, and managing general agencies. The HG Global/BAM segment refers to the White Mountains's investment in HG Global Limited, and the consolidated results of Build America Mutual Assurance Company (BAM). The Other Operations segment comprises of the Company and its intermediate holding companies, its wholly-owned management subsidiary, White Mountains Advisors LLC, and other consolidated and unconsolidated private capital investments. The company was founded in 1980 and is headquartered in Hanover, NH.