Colonial Supplemental Insurance is the marketing brand of Colonial Life & Accident Insurance Company. Colonial Supplemental Insurance provides supplemental insurance coverage for customers in 49 states in the United States and Puerto Rico. Its products include disability insurance, and accident insurance and life insurance, as well as cancer and critical illness insurance and hospital confinement insurance. Colonial Supplemental was founded in 1939 and has headquarters in Columbia, S.C. The company is a subsidiary of Unum Provident Corporation, an industry leader in disability income protection and one of the top providers of supplemental benefits in the United States. Unum Provident has primary offices in Chattanooga, Tenn., and Portland, Maine.