Enstar Group Limited acquires and manages insurance and reinsurance companies, and portfolios of insurance and reinsurance business in run-off. It operates in three segments: Non-Life Run-Off, Atrium, and StarStone. The Non-Life Run-Off segment engages in the running off property and casualty, and other non-life lines of businesses. It also provides consulting services, including claims inspection, claims validation, reinsurance asset collection, and IT consulting services to the insurance and reinsurance industry. The Atrium segment is involved in underwriting various classes, including marine, aviation, transit, property and casualty binding authorities, reinsurance, accident and health, and non marine direct and facultative. The StarStone segment offers a range of property, casualty, and specialty insurance products to multi-national, and small and middle-market clients. It operates in Bermuda, the United States, the United Kingdom, Continental Europe, Australia, and internationally. The company was formerly known as Castlewood Holdings Limited and changed its name to Enstar Group Limited in January 2007. Enstar Group Limited was founded in 2001 and is based in Hamilton, Bermuda.