W.R. Berkley Corp. is an insurance holding company, which engages in the property casualty insurance business. The company is headquartered in Greenwich, Connecticut and currently employs 8,804 full-time employees. The company operates through two segments of the property casualty insurance business: Insurance and Reinsurance & Monoline Excess. Its Insurance businesses underwrite commercial insurance business, including excess and surplus lines, admitted lines and specialty personal lines throughout the United States, as well as insurance business in Asia, Australia, Canada, Continental Europe, Mexico, Scandinavia, South America and the United Kingdom. Its Insurance segment consists of business units, including Acadia Insurance, Admiral Insurance, Berkley Accident and Health, Berkley Agribusiness, and others. Berkley Accident and Health underwrite accidents and health insurance and reinsurance products. Its Reinsurance & Monoline Excess offers reinsurance business on a facultative and treaty reinsurance in the Asia Pacific region, Australia, Continental Europe, South Africa and the United Kingdom.