| CMS Energy Corporation (CMS Energy) is an energy holding company operating through subsidiaries in the United States, primarily in Michigan. Its two principal subsidiaries are Consumers and Enterprises. Consumers is a public utility that provides electricity and/or natural gas to almost 6.5 million of Michigan's 10 million residents and serves customers in all 68 counties of Michigan's Lower Peninsula. Enterprises, through various subsidiaries and certain equity investments, are engaged primarily in domestic independent power production. CMS Energy manages its businesses by the nature of services each provides and operates principally in three business segments: electric utility, gas utility and enterprises. |