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CMS Energy Corp. is a holding company, which engages in the provision of electric and natural gas activities. It operates through the following business segments: Electric Utility, Gas Utility, and Enterprises. The Electric Utility segment consists of regulated activities associated with the generation, purchase, distribution, and sale of electricity in Michigan. The Gas Utility segment includes purchase, transmission, storage, distribution, and sale of natural gas in Michigan. The Enterprises segment is involved in domestic independent power production, including the development and operation of renewable generation, and the marketing of independent power production. The company was founded in 1987 and is headquartered in Jackson, MI.