Alliant Energy Corporation Announces First Quarter 2007 Earnings Release and Conference Call

MADISON, Wis., April 20 /PRNewswire-FirstCall/ — Alliant Energy Corporation (NYSE:LNT) has scheduled its first quarter 2007 earnings release for Friday, May 4, before the stock market opens. A conference call to review the first quarter results is scheduled for the same day at 9:00 a.m. CT.

Alliant Energy will webcast the event live at The call is open to the public and will be hosted by Bill Harvey, Chairman, President and CEO, and Eliot Protsch, Senior Executive Vice President and CFO. Individuals who would like to participate in the conference call can do so by dialing (877) 668-4404 (United States & Canada), no pass code required.

A replay of the call will be available through May 11, 2007, at (800) 642-1687 (domestic) or (706) 645-9291 (international). Callers should reference conference ID# 4528519. An archive of the webcast will also be available on the company’s website at

Alliant Energy Corporation is an energy-services provider with subsidiaries serving approximately 1 million electric and over 420,000 natural gas customers. Providing its customers in the Midwest with regulated electricity and natural gas service is the company’s primary focus. Alliant Energy, headquartered in Madison, Wis., is a Fortune 1000 company traded on the New York Stock Exchange under the symbol LNT. For more information, visit the company’s Web site at

Media Contact: Scott Smith (608) 458-3924

Investor Relations Contact: Becky Johnson (608) 458-3267

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Source: Alliant Energy Corporation