Ameren Illinois Co
Close on Oct 19, 2026
- Market cap
- –
- P/E (TTM)
- –
- Dividend yield
- –
About Ameren Illinois
Electric & Other Services Combined, SIC 4931
Ameren Corporation operates as a public utility holding company that provides electric generation, transmission, and distribution, alongside natural gas distribution services. The enterprise conducts operations through four primary segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. Its electricity generation portfolio encompasses a diverse fuel mix comprising nuclear power, coal, natural gas, hydroelectric facilities, solar installations, wind resources, and landfill methane. Ameren supplies rate-regulated utility services directly to retail electric and natural gas consumers, while also catering to wholesale energy markets and large industrial loads, including data centers and manufacturing operations.
The company is headquartered in St. Louis, Missouri. Its transmission network forms an integrated power system connecting directly with fifteen separate balancing authority areas throughout the region. Operating primarily across service territories in Missouri and Illinois, Ameren utilizes energy generation facilities such as the Callaway Energy Center nuclear facility and the Osage, Keokuk, and Taum Sauk hydroelectric centers.
Summary of the business section of Ameren Illinois's latest annual report, written by StockData.
Company profile
Company
- Legal name
- Ameren Illinois Co
- Founded
- 1997
- Headquarters
- Collinsville, IL
- Address
- 10 Richard Mark Way 62234
- Phone
- (618) 343-8150
- Employees
- 50, Dec 31, 2023
- Industry
- Electric & Other Services Combined
- Incorporated in
- Illinois
- Fiscal year ends
- December 31
Stock & identifiers
- Ticker
- AILIH
- Other tickers
- AILIM, AILIN, AILIO, AILIP, AILLI, AILLM, AILLN, AILLO, AILLP
- Exchange
- OTC
- SEC CIK
- 18654
- EIN
- 37-0211380
Executives and directors
Officers and directors who filed ownership reports (Forms 3, 4, 5) in the last two years
No recent ownership filings by officers or directors
Ameren Illinois's leadership is listed in its proxy statement (Form DEF 14A).
Corporate history
Events identified from SEC filings
| Date | Event | Details |
|---|---|---|
| Oct 7, 2010 | Acquisition / sale | Completion of acquisition or disposition of assets (8-K Item 2.01) |
| Sep 13, 2010 | Name change | Name changed from CENTRAL ILLINOIS PUBLIC SERVICE CO to Ameren Illinois Co |
| Apr 15, 2010 | Merger | Registration of securities for a merger or exchange offer (S-4) |