Stocks symbol traded as NYSE: LNT. Alliant Energy Corporation is a public utility holding company that incorporated in Madison, Wisconsin United States in 1981.

It consists of 4 subsidiaries:
Interstate Power and Light Company (IPL) is a public utility that generates and distributes electricity and distributes and transports natural gas in Iowa.
Wisconsin Power and Light Company (WPL) provides similar services as IPL in southern and central Wisconsin.
Resource are organized to manage non-regulated investments
Corporate Services provides administrative services to Alliant Energy and its subsidiaries.