Calpine Corporation is a power generation company headquartered in Houston, Texas. Calpine's fleet of natural gas-fired and geothermal power plants has a combined generating capacity of approximately 26,000 megawatts. Calpine sells wholesale power and other energy-related services to utilities, independent electric system operators, industrial and commercial customers, and retail power providers. The company was founded in 1984 and went public in 1996. In 2018, Calpine was acquired by Energy Capital Partners and a consortium of investors.