Chubb Limited, incorporated in Zurich, Switzerland, is the parent company of Chubb, a global provider of insurance products covering property and casualty, accident and health, reinsurance, and life insurance. Chubb operates in 54 countries and territories and in the Lloyd's insurance market in London and is the world’s largest publicly traded property and casualty insurer. Clients of Chubb 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. The current company arose when ACE Limited acquired Chubb in 2016, then adopted the Chubb name.
In 2014, the group had $98.2 billion in assets, $23.4 billion of gross written premiums and approximately 21,000 employees. ACE trades on the NYSE and is a component of the S&P 500 index. Its core operating insurance companies are rated "AA" (Very Strong) for financial strength by Standard & Poor's and "A++" (Superior) by A. M. Best with stable outlooks from both agencies. Fitch rates ACE Limited and its subsidiaries "AA" (Very Strong) for financial strength, "AA-" for issuer default and "A+" for senior debt. Moody's rates the U.S. companies "A1" and the unsecured loan notes "A3".On July 1, 2015, ACE announced that it would acquire Chubb Corporation for $28.3 billion in cash and stock. ACE has committed that Chubb's current headquarters in Warren, New Jersey, USA, will have a substantial portion of the headquarters function for the combined company's North American Division. The combined company adopted the Chubb name in January 2016 after the acquisition was completed.