What We Do

Alliant Energy Corporation, headquartered in Madison, Wis., 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 electric and natural gas service is the company’s primary focus.

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

• Mission, Vision & Values
• Ethical & Legal Compliance
• Diversity Commitment

Our regulated utility subsidiaries – Wisconsin Power and Light Co. and Interstate Power and Light Co. – provide electric and natural gas service to customers in Iowa, Wisconsin and Minnesota.

We maintain a strong fleet of fossil fuel, nuclear and renewable generating facilities across the upper Midwest, generating more than 31 million megawatt hours of electricity each year.

Learn more about our regulated utility services

Non-regulated businesses

Alliant Energy Resources, the parent company for Alliant Energy’s non-regulated businesses, is focused on utility-based investments in key international markets and developing non-regulated generation in select areas of the United States.

Learn more about our non-regulated businesses

Corporate services

Alliant Energy Corporate Services, Inc., our third business unit, supports the other areas of the company with traditional administrative functions, including information technology, human resources, corporate communications, environmental services and more.