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Investor Contacts

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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:

Susan Gille - Manager, Investor Relations
4902 N. Biltmore Lane
Suite 1000
Madison, WI 53718-2148
Phone: (608) 458-3956
Fax: (608) 458-0132
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:

Kari Nelson - Administrator, Shareowner Services
P.O. Box 14720
Madison, WI 53708-0720
Phone: 1-608-458-3110
Fax: (608) 458-3321
Contact Shareowner Services

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
1110 Centre Pointe Curve, Ste. 101
MAC N9173-010
Mendota Heights, MN 55120
Phone: 1-800-356-5343