OneBeacon Insurance Group, Ltd. operates as a property and casualty insurance writer focused on specialty lines. Its businesses include International Marine Underwriters, which offers ocean marine insurance; OneBeacon Technology Insurance that provides property, general liability, business auto, commercial umbrella, workers compensation, international, technology errors or omissions, data privacy, and communications liability policies for the technology sector; OneBeacon Accident Group, which offers accidental death and dismemberment, occupational and sports accident, vehicle physical damage, and other accident coverage; OneBeacon Government Risks, which offers property, casualty, and professional liability products to publicly funded agencies; and OneBeacon Energy Group property, which offers inland marine, casualty, general liability, auto liability, and umbrella liability insurance primarily to energy businesses. The company’s businesses also comprise OneBeacon Professional Insurance, which offers professional liability solutions; OneBeacon Property and Inland Marine that provides monoline property and inland marine products; OneBeacon Specialty Property, which provides excess property and inland marine solutions; and OneBeacon Excess and Surplus, which offers insurance products in the excess and surplus market. In addition, its businesses include Collector Cars and Boats that provides coverage for collectible vehicles and wooden boats, automotive museums, and restoration shops; A.W.G. Dewar, which offers tuition reimbursement insurance; and OneBeacon Entertainment that provides commercial insurance for entertainment, sports, and leisure industries. OneBeacon Insurance sells its products through a network of independent agents, regional and national brokers, and wholesalers in the United States. The company was founded in 1831 and is headquartered in Minnetonka, Minnesota. OneBeacon Insurance Group, Ltd. is a subsidiary of White Mountains Insurance Group, Ltd.