W. R. Berkley Corporation, an insurance holding company, operates as commercial lines writers primarily in the United States. The company operates in three segments: Insurance-Domestic, Insurance-International, and Reinsurance-Global. The Insurance-Domestic segment underwrites risks of various business lines, including premises operations, commercial automobile, property, general liability, products liability, and professional liability lines. This segment also provides commercial insurance products and services to small-to-mid-sized businesses, and state and local governmental entities primarily in 45 states and the District of Columbia; and services comprising claims, administrative, and consulting services. The Insurance-International segment underwrites specialty, casualty, property, automobile, group life and health and workers' compensation, professional indemnity, directors’ and officers’ liability, medical malpractice, general liability, personal accident and travel, engineering and construction, and surety lines of business in approximately 60 countries. The Reinsurance-Global segment offers other insurance companies and self-insureds with assistance in managing their net risk through reinsurance on a portfolio basis through treaty reinsurance or on an individual basis through facultative reinsurance. W. R. Berkley Corporation was founded in 1967 and is based in Greenwich, Connecticut.