About Us Westchester is one of the largest and most diverse excess and surplus lines commercial property and casualty insurance companies in the United States. Focused on the wholesale distribution channel, Westchester provides innovative specialty products for property, specialty casualty, environmental, professional risk, inland marine, product recall, small business, binding and programs. The business is further distinguished by exceptional financial strength, underwriting excellence and superior claims handling expertise. Westchester is a company of Chubb, the world’s largest publicly traded property and casualty insurer. With operations in 54 countries, Chubb provides commercial and personal property and casualty insurance, personal accident and supplemental health insurance, reinsurance and life insurance to a diverse group of clients. Parent company Chubb Limited is listed on the New York Stock Exchange (NYSE: CB) and is a component of the S&P 500 index. Chubb maintains executive offices in Zurich, New York, London and other locations, and employs approximately 30,000 people worldwide.