Investor Relations Contact for Analysts and
Institutional Investors: If you are a buy-side or sell-side analyst or an institutional investor and
have questions regarding Alliant Energy, please direct your inquiries to:
Sue Gille - Manager, Investor Relations
4902 N. Biltmore Lane
Suite 1000
Madison, WI 53718-2148
Phone: (608) 458-3956
Fax: (608) 458-0130 Contact Investor Relations
Shareowner Services Contact for Individual
Shareowners: If you are an individual shareowner and have questions regarding your account or Alliant Energy, please direct your inquiries to:
Stock Transfer Agent and Registrar: For Alliant Energy common stock and all preferred stock of Wisconsin Power and Light Company and Interstate Power and Light Company, contact:
Wells Fargo Shareowner Services
161 N. Concord Exchange
South St. Paul, MN 55075
Phone: 1-800-356-5343
