Alliant Energy: Hosts annual meeting of shareowners in Cedar Rapids

Media Contact: Scott Reigstad (608) 458-3145

Investor Relations: Susan Gille (608) 458-3956

CEO and new President & COO reflect on solid 2010 and express optimism for the future

CEDAR RAPIDS, Iowa – May 10, 2011 – Alliant Energy Corporation (NYSE: LNT) Chairman and CEO Bill Harvey and President and Chief Operating Officer Pat Kampling reflected on a solid 2010, while expressing optimism for the future as they addressed the 2011 Annual Meeting of Shareowners today at The Hotel at Kirkwood Center in Cedar Rapids.

“I am pleased to report that 2010 was a solid and successful year for your company,” Harvey told shareowners. “Having faced our share of challenges over the past couple of years, 2010 proved to all of us that resilience and focus produce positive results.” He later added that, “We see a positive future for our company and remain upbeat and view the path in front of us as one of opportunity.”

Harvey also detailed Alliant Energy’s ongoing investment in renewable energy, citing the 200-megawatt Whispering Willow East Wind Farm in Franklin County, Iowa commissioned in late 2009 and the 200-megawatt Bent Tree Wind Farm in Minnesota that recently started commercial operation. By 2012, wind is expected to make up 11 percent of Alliant Energy’s overall generation portfolio. “We are proud that our company is preparing for a greener future using renewable energy,” Harvey stated.

Pat Kampling, named Alliant Energy Corporation President and Chief Operating Officer this past February, outlined the execution of the company’s strategic plan.

“Our customers form the foundation of our plan, and putting our customers first – today and in the future – is the beacon that guides everything we do,” Kampling said to shareowners. “The three key elements of our plan are providing energy at competitive costs; ensuring reliable service and managing a balanced generating fleet so that it can provide energy flexibility for our customers for years to come.”

Kampling additionally elaborated on Alliant Energy’s significant investment in its larger and most efficient electric generating stations. “We believe these investments will increase efficiency, reduce emissions and extend the life of these units which will provide our customers with competitive and reliable power for decades to come,” she said.

Kampling wrapped up her remarks by expressing her thoughts on the future of the company’s strategic plan. “In the long-term, our company will manage our coal, gas and wind generating fleet with the overall goals of reducing our reliance on market purchases, managing costs and maintaining flexibility. We believe that our customers and shareowners are best served with a balanced generation portfolio approach.”

Nearly 300 shareowners attended the Alliant Energy 2011 Annual Meeting. The company rotates its annual meetings, every other year, between Madison, Wis. and Cedar Rapids, Iowa.