The Massachusetts Mutual Life Insurance Company (MassMutual), founded in 1851, is an American mutual life insurance company serving five million clients. With headquarters in Springfield, Massachusetts, the company employs more than 7,000 in the United States, and a total of 10,614 internationally.MassMutual ranked No. 93 in the 2018 Fortune 500 list of the largest United States corporations by total revenue. The company has revenues of $29.6 billion and assets under management of $675 billion (as of 2016).MassMutual provides financial products such as life insurance, disability income insurance, long term care insurance, retirement/401(k) plan services, and annuities. Major affiliates include Barings LLC, Haven Life Insurance Agency, and OppenheimerFunds, Inc.