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Alliant Energy Corp. operates as a regulated investor-owned public utility holding company that engages in the provision of regulated electricity and natural gas service to natural gas customers in the Midwest through its two public utility subsidiaries. It operates its business through two segments: Utility and Non-Regulated, Parent and Other. The utility segment consists of Interstate Power and Light Co. and Wisconsin Power & Light Co. The Interstate Power & Light Co. is a public utility engaged principally in the generation and distribution of electricity and the distribution and transportation of natural gas in selective markets in Iowa and southern Minnesota. The Wisconsin Power and Light Co. is a public utility engaged principally in the generation and distribution of electricity and the distribution and transportation of natural gas in selective markets in southern and central Wisconsin. The Non-regulated, Parent and Other segment includes the operations of Resources and its subsidiaries, Corporate Services, the Alliant Energy parent company, and any Alliant Energy parent company consolidating adjustments. The company was founded in 1981 and is headquartered in Madison, WI.
Alliant Energy Corporation operates as a utility holding company that provides regulated electricity and natural gas services to residential, commercial, industrial, and wholesale customers in the Midwest region of the United States. It operates through three segments: Electric, Gas, and Other. The company, through its subsidiary, Interstate Power and Light Company (IPL), primarily generates and distributes electricity, and distributes and transports natural gas to retail customers in Iowa; sells electricity to wholesale customers in Minnesota, Illinois, and Iowa; and generates and distributes steam in Cedar Rapids, Iowa. Alliant Energy, through its subsidiary, Wisconsin Power and Light Company (WPL), generates and distributes electricity, and distributes and transports natural gas in Wisconsin; and sells electricity to wholesale customers in Wisconsin. As of December 31, 2016, IPL supplied electricity to 490,000 retail customers and natural gas to 220,000 retail customers; and WPL supplied electricity to 470,000 retail customers and natural gas to 190,000 retail customers. It offers electric utility services to retail customers in food and industrial manufacturing, chemical, and paper industries. In addition, the company holds investments in various businesses, which provide freight services through a short-line railway between Cedar Rapids and Iowa City, Iowa; a barge terminal and hauling services on the Mississippi River; and other transfer and storage services. Further, it owns a non-regulated 347 megawatt (MW) natural gas-fired electric generating unit near Sheboygan Falls, Wisconsin; and owns the non-regulated 99 MW Franklin County wind farm located in Franklin County, Iowa. Alliant Energy Corporation was founded in 1917 and is headquartered in Madison, Wisconsin.