Calpine Corporation is a U.S.-based independent power producer headquartered in Houston, Texas. The company owns and operates a large fleet of natural gas–fired combined-cycle and cogeneration plants, along with the Geysers geothermal complex in California, making it one of the country’s largest generators from natural gas and geothermal resources. Its portfolio spans major competitive power markets across the United States.
For industrial customers—including refineries and chemical manufacturers—Calpine develops and operates combined heat and power facilities that deliver electricity and process steam, improving energy efficiency and reliability at large sites, particularly along the U.S. Gulf Coast. The company also provides power marketing and energy supply services through affiliates to commercial and industrial users. Calpine focuses on flexible, lower-emission generation technologies and grid support services to meet peak and baseload needs.