Alliant Energy Corporation is a public utility holding company that provides regulated electric and natural gas services in the Midwestern United States. Headquartered in Madison, Wisconsin, and founded in 1981, the company operates primarily through its utility subsidiaries Interstate Power and Light and Wisconsin Power and Light, which serve customers across Iowa and Wisconsin. Alliant Energy Corporation focuses on the generation, transmission, and distribution of electricity, as well as the distribution and transportation of natural gas to residential, commercial, and industrial users. Its portfolio includes a mix of power generation assets and participation in regional transmission infrastructure through an ownership interest in American Transmission Company. Operating within the regulated utilities sector, Alliant Energy Corporation plays a central role in supporting regional economic activity, providing essential energy services, and maintaining grid reliability for the communities in its service territories.