CMS Energy Corporation is an energy company operating primarily in Michigan. The Company operates through three segments: electric utility, which consists of regulated activities associated with the generation, transmission and distribution of electricity in Michigan; gas utility, which consists of regulated activities associated with the transportation, storage and distribution of natural gas in Michigan, and enterprises, which consists of various subsidiaries engaging primarily in domestic independent power production. The Company is the parent holding company of various subsidiaries, including Consumers Energy Company (Consumers), an electric and gas utility company, and CMS Enterprises Company (CMS Enterprises), a domestic independent power producer. Consumers serves individuals and businesses operating in the alternative energy, automotive, chemical, metal, and food products industries, as well as a group of other industries.