Alliant Energy headquarters details
- Street address
- 4902 N. Biltmore Lane
- City
- Madison
- State / region
- Wisconsin
- ZIP / postal code
- 53718
- Country
- United States
- Phone
- +1 608 458 3311
- Website
- alliantenergy.com
- Stock
- NASDAQ: LNT
Location map
Open in Google MapsAll Alliant Energy office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Madison HQ | Wisconsin | United States | Headquarters |
Showing the headquarters of 124 recorded locations. See every location in GraphIQ →
About Alliant Energy
Alliant Energy (NASDAQ: LNT) is headquartered in Madison, Wisconsin, United States. The company has 124 recorded locations across 2+ countries and employs approximately 2,948 people worldwide.
Where is Alliant Energy's main office?
Alliant Energy's main headquarters office is located at 4902 N. Biltmore Lane, Madison, Wisconsin 53718, United States. This is the company's primary corporate address.
Alliant Energy regional offices
Beyond its headquarters in Madison, Alliant Energy has recorded locations in United States and United Kingdom.
Alliant Energy contact information
The main switchboard for Alliant Energy headquarters can be reached at +1 608 458 3311. Official website: alliantenergy.com.
What does Alliant Energy do?
Alliant Energy Corporation provides public-utility services. The Company supplies electricity, natural gas, and water to residential and commercial customers. Alliant Energy serves customers in the States of Illinois, Iowa, Minnesota, and Wisconsin.
Alliant Energy competitors & similar companies
Frequently asked questions
Where is Alliant Energy headquarters?
Alliant Energy's headquarters is located at 4902 N. Biltmore Lane, Madison, Wisconsin 53718, United States.
How many offices does Alliant Energy have?
GraphIQ records 124 locations for Alliant Energy across 2+ countries, as of October 2026.
What is Alliant Energy's corporate address?
The corporate headquarters address is 4902 N. Biltmore Lane, Madison, Wisconsin 53718, United States.
What is Alliant Energy's phone number?
The main phone number for Alliant Energy headquarters is +1 608 458 3311.
How many employees does Alliant Energy have?
Alliant Energy has approximately 2,948 employees (GraphIQ estimate, 2026).
Is Alliant Energy a public company?
Yes. Alliant Energy is publicly traded on NASDAQ under the ticker LNT.