Alliant Energy Corporation operates as a utility holding company that provides regulated electric and natural gas services in the United States. It operates through IPL and WPL segments. The company, through its subsidiary, Interstate Power and Light Company (IPL), engages primarily in the generation and distribution of electricity and the distribution and transportation of natural gas to retail customers in select markets in Iowa. This segment also sells electricity to wholesale customers in Minnesota, Illinois and Iowa; and generates and distributes steam for two customers in Cedar Rapids, Iowa.
