Chubb Limited is an American–Swiss company incorporated in Zürich and listed on the New York Stock Exchange, where it is a component of the S&P 500. Chubb is a global provider of insurance products covering property and casualty, accident and health, reinsurance, and life insurance, and is the largest publicly traded property and casualty insurance company in the world. Chubb operates in 55 countries and territories and in the Lloyd's insurance market in London. Its clients consist of multinational corporations and local businesses, individuals, and insurers seeking reinsurance coverage. Chubb provides commercial and personal property and casualty insurance, personal accident and supplemental health insurance, reinsurance, and life insurance. In 2018, the group had $174 billion in assets, $30.8 billion in gross written premiums, and approximately 31,000 employees. Its core operating insurance companies are rated "AA" for financial strength by Standard & Poor's and "A++" by A. M. Best. It has stable outlooks from both agencies. Fitch rates Chubb Limited and its subsidiaries "AA" for financial strength, "AA−" for issuer default, and "A+" for senior debt.