# Alliant Energy

> Alliant Energy is a publicly traded utility holding company whose Iowa and Wisconsin subsidiaries supply electricity and natural gas. Its business combines power generation and distribution with regulated infrastructure investment, renewable generation, energy storage and customer efficiency programs.

- **Founded:** 1998
- **Headquarters:** Madison, United States
- **Products:** Regulated electricity service, Natural gas service, Energy storage, Columbia Energy Storage Project, My Account and Energy Analytics
- **Notable:** Completed 1,089 MW of new Wisconsin solar generation during 2022-2024., Placed the Grant County, Wood County and Wever energy storage facilities in service in 2025., Received Wisconsin regulatory approval for Columbia storage in June 2025.

## Products & services

- **Regulated electricity service** — Power generation and distribution through Interstate Power and Light in Iowa and Wisconsin Power and Light in Wisconsin.
- **Natural gas service** — Distribution and transportation for residential, commercial and industrial customers.
- **Energy storage** — Utility-scale batteries including Grant County, Wood County and Wever facilities placed in service in 2025.
- **Columbia Energy Storage Project** — Planned compressed-CO₂ long-duration storage using Energy Dome technology, designed around 200 MWh and approximately ten hours of discharge; completion targeted for 2027.
- **My Account and Energy Analytics** — Account management, usage information, outage reporting and business efficiency recommendations.

## Achievements

- Completed 1,089 MW of new Wisconsin solar generation during 2022-2024.
- Placed the Grant County, Wood County and Wever energy storage facilities in service in 2025.
- Received Wisconsin regulatory approval for Columbia storage in June 2025.
- Named a Top Utility in Economic Development by Site Selection in September 2026.

## Latest updates

- **2026-10** — Wisconsin PSC project summary reports an October 22 final decision for Rock County LNG, with completion expected by July 2029.
- **2026-09** — Alliant announced recognition as a Top Utility in Economic Development by Site Selection.
- **2026-08** — Iowa regulators approved a reduction to residential natural gas rates in a subsequent proceeding related to the 2024 rate case.
- **2026-07** — Second-quarter earnings release forecast 60% load growth by 2031; this remains a forecast.

## Links

- Website: https://www.alliantenergy.com
- LinkedIn: https://www.linkedin.com/company/alliant-energy
- Twitter/X: https://twitter.com/alliantenergy
- YouTube: https://www.youtube.com/alliantenergyvideo
- Instagram: https://www.instagram.com/alliant_energy/
- Facebook: https://www.facebook.com/AlliantEnergy

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Profile page: https://yespress.io/alliant-energy
Published by YesPress — https://yespress.io
Last updated: 2026-10-24