James River Group Holdings, Ltd. is a Bermuda-based insurance holding company, which owns and operates a group of specialty insurance and reinsurance companies. The Company operates in three specialty property-casualty insurance and reinsurance segments: Excess and Surplus Lines, Specialty Admitted Insurance and Casualty Reinsurance. The Excess and Surplus Lines segment offers commercial excess and surplus lines liability and property insurance in every United States state, the District of Columbia, Puerto Rico and the United States Virgin Islands through James River Insurance Company and its wholly owned subsidiary, James River Casualty Company. The Specialty Admitted Insurance segment approaches the insurance market in two ways: as a fronting company and as a risk- bearing underwriter. The Casualty Reinsurance segment focused on the United States insurance businesses. Its Corporate and Other segment consists of the management and treasury activities of its holding companies.