CMS Energy Corp. engages in the provision of electric and natural gas activities. It operates through the following business segments: Electric Utility, Gas Utility, and NorthStar Clean Energy. The Electric Utility segment focuses on generation, purchase, distribution, and sale of electricity. The Gas Utility segment includes purchase, transmission, storage, distribution, and sale of natural gas. The NorthStar Clean Energy 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.