Unum Group is an American insurance company headquartered in Chattanooga, Tennessee. Founded as Union Mutual in 1848 and known as UnumProvident from 1999–2007, the company is part of the Fortune 500. Unum Group was created by the 1999 merger of Unum Corporation and The Provident Companies and comprises four distinct businesses – Unum US, Unum UK, Unum Poland and Colonial Life. Its underwriting insurers include The Paul Revere Life Insurance Company and Provident Life and Accident Insurance Company. As of 2018, Unum was the third-largest disability insurer in the United States. Unum also offers other insurance products including accident, critical illness and life insurance as well as workplace leave management and mental health. In 2022, Unum insured about 45 million individuals through group policies and reported revenue of $11.991 billion.