Alliant Energy Corporation is a regulated utility holding company that provides electric and natural gas services throughout the Midwest. Operating through its two primary subsidiaries, Interstate Power and Light Company and Wisconsin Power and Light Company, the company serves approximately one million electric customers and hundreds of thousands of natural gas customers across Iowa and Wisconsin. Alliant Energy generates and distributes electricity while also handling natural gas distribution and transportation. Beyond its core utility operations, the company owns a significant interest in American Transmission Co. and operates complementary business segments including short-line rail freight services, barge and truck freight terminals, and wind turbine blade recycling services. The company maintains a balanced investment approach focused on energy infrastructure modernization while adapting to evolving market demands. Founded in 1981 and headquartered in Madison, Wisconsin, Alliant Energy serves diverse customer segments including retail consumers, industrial manufacturers, and wholesale customers such as municipalities and rural electric cooperatives.