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Operations and Organization

Alliant Energy Corporation (NYSE: LNT) is a Midwest U.S. energy company primarily engaged in electric generation and the distribution of electricity and natural gas. 

For more than 100 years, Alliant Energy and our predecessor companies have kept homes warm, lights burning and factories running across the upper Midwest.

Operations at a glance

Number of electric customers


Number of natural gas customers


Number of employees


Operating revenues (year-end 2014) 

 $3.3 billion

 Total assets (year-end 2014)

 $12 billion


Madison, Wisconsin

Service territory

28,090 square miles in Iowa and Wisconsin

Miles of electric lines


Miles of natural gas main


Electric generation

30 million megawatt-hours per year

Maximum peak hour demand

5,426 megawatts

Utility natural gas sold and transported

123,446 (thousands of dekatherms)mi

All numbers are approximations.

In addition, our focus extends beyond our energy operations. Every day, we demonstrate our commitment to community involvement.

How we're organized

Utility business
Interstate Power and Light Company (IPL) and Wisconsin Power and Light Company (WPL) are Alliant Energy’s two utility subsidiaries. As the primary targets of our future capital investments, the utilities also represent our growth platform. The strategic plan for Alliant Energy’s utility operations is concentrated on:

The utilities own a portfolio of electric generating facilities with a diversified fuel mix including coal, natural gas and renewable resources. The output from these generating facilities is supplemented with purchased power.

Non-regulated businesses
Alliant Energy Resources is the parent company of Alliant Energy’s non-regulated businesses. The strategic plan for Alliant Energy’s non-regulated operations involves maintaining a portfolio of businesses that are accretive to earnings but not significant users of capital.

Learn more about our non-regulated businesses

Support services
Alliant Energy Corporate Services, Inc. supports the company with traditional administrative functions including strategy, accounting, communications, legal, regulatory, information technology, environmental and safety management and more.