Madison-based utility holding company Alliant Energy Corporation offers regulated electricity and natural gas services to retail customers in several Midwestern states. The firm operates through three distinct segments – Utility Electric Operations, Utility Gas Operations, and Utility Other – with its Interstate Power and Light Company (IPL) subsidiary handling the majority of electricity and natural gas distribution in Iowa. The company’s Wisconsin Power and Light Company (WPL) subsidiary offers similar services to retail customers in Wisconsin. In addition to its utility operations, Alliant Energy Corporation offers freight brokerage services and operates several rail and barge terminals in the central US. The company owns interests in both natural gas and wind energy projects, including a gas-fired electric generating unit in Wisconsin and a wind farm in Oklahoma. Alliant Energy Corporation was founded in 1981.