TECO Energy, Inc., through its subsidiaries, engages in the generation, purchase, transmission, distribution, and sale of electric energy in Florida. The company provides retail electric service to approximately 667,000 customers in west central Florida. It also purchases, distributes, and sells natural gas to approximately 335,000 customers, including residential, commercial, industrial, and electric power generation customers in Florida. In addition, TECO Energy owns mineral rights; and owns and operates surface and underground mines, synthetic fuel production facilities, and coal processing and loading facilities in eastern Kentucky, Tennessee, and southwestern Virginia. The company was founded in 1899 and is headquartered in Tampa, Florida.