James River Group Holdings, Ltd., through its subsidiaries, provides specialty insurance and reinsurance services in the United States. It operates in four segments: Excess and Surplus Lines, Specialty Admitted Insurance, Casualty Reinsurance, and Corporate and Other. The Excess and Surplus Lines segment underwrites property and liability insurance on an excess and surplus commercial lines basis in all states and the District of Columbia. This segment distributes its insurance policies primarily through wholesale insurance brokers. The Specialty Admitted Insurance segment provides workers' compensation coverage for residential contractors, light manufacturing operations, transportation workers, and healthcare workers in North Carolina, Virginia, South Carolina, and Tennessee. The Casualty Reinsurance segment offers proportional and working layer casualty reinsurance to third parties and unaffiliated insurance companies. The Corporate and Other segment includes the management and treasury activities of its holding companies, as well as interest expense associated with debts. James River Group Holdings, Ltd. was founded in 2002 and is headquartered in Pembroke, Bermuda.