Founded in 1967 and based in Greenwich, CT., W.R. Berkley Corp. is a Fortune 500 company. It is one of the nation’s largest commercial lines property casualty insurance providers. The company offers a variety of insurance services from reinsurance, to workers comp third party administrators (TPAs). Effective since first quarter of 2016, the company reports results in two segments – Insurance and Reinsurance. Insurance-Domestic operating units and Insurance-International operating units that were previously reported separately have been combined with the Insurance segment. The two reporting segments are composed of individual operating units that serve a market defined by geography, products, services or industry served. Insurance segment (92.5% of 2019 net premiums written) predominantly underwrites commercial insurance business primarily throughout the United States, although many units offer coverage globally. Reinsurance segment (7.5%) is operated primarily on a facultative and treaty basis. It provides other insurance companies and self-insureds with assistance in managing their net risk through reinsurance on either a portfolio basis, through treaty reinsurance, or on an individual basis, through facultative reinsurance.