Alliant Energy Corp.

Public Company, Headquarters Location
PO Box 77007, Madison, WI 53707-1007, United States
(800)255-4268, (608)458-0100 fax, http://www.alliantenergy.com

Primary SIC: Electric Services, Primary NAICS: Electric Power Distribution
Description: Alliant Energy Corporation was incorporated in Wisconsin in 1981 and maintains its principal executive offices in Madison, Wisconsin. The company is a regulated investor-owned public utility holding company, providing regulated electricity and natural gas service to approximately 1 million electric and approximately 400,000 natural gas customers in the Midwest, as of December 2008. Its primary subsidiaries are IPL, WPL, Resources and Corporate Services. IPL was incorporated in 1925 in Iowa as Iowa Railway and Light Corporation. It is principally engaged in the generation and distribution of electric energy and the distribution and transportation of natural gas in Iowa and southern Minnesota. In 2008, IPL began construction of its first wind project in Franklin County, Iowa, which is expected to begin operation by early 2010. WPL was incorporated in 1917 in Wisconsin as Eastern Wisconsin Electric Company. It is principally engaged in the generation and distribution of electric energy and the distribution and transportation of natural gas in south and central Wisconsin. Resources was incorporated in 1988 in Wisconsin. In November 2008, it became a limited liability company with Alliant Energy as its sole member. Corporate Services was incorporated in 1997 in Iowa to provide administrative services to the company. More

Utilities: Electric services and gas distribution.