EX-21 10 exhibit21.txt EXHIBIT 21 EXHIBIT 21 ALLIANT ENERGY CORPORATION SUBSIDIARIES OF THE REGISTRANT
The following are deemed to be significant subsidiaries of Alliant Energy Corporation as of Dec. 31, 2002: Name of Subsidiary State of Incorporation ------------------ ---------------------- Interstate Power and Light Company Iowa Wisconsin Power and Light Company Wisconsin Alliant Energy Resources, Inc. Wisconsin Alliant Energy International, Inc. Iowa WISCONSIN POWER AND LIGHT COMPANY SUBSIDIARIES OF THE REGISTRANT The following are deemed to be significant subsidiaries of Wisconsin Power and Light Company as of Dec. 31, 2002: Name of Subsidiary State of Incorporation ------------------ ---------------------- WPL Transco LLC Wisconsin