Ameren Illinois Co (AILLO) stock
Close on Oct 19, 2026Market cap –P/E –Yield –
Key statistics
Valuation at the latest close; fundamentals over fiscal
Valuation
- Market cap
- –
- P/E ratio
- –
- Price to sales
- –
- Price to book
- –
- Dividend yield
- –
- Free cash flow yield
- –
Trading
- Previous close
- $65.25
- Open
- $65.25
- Day's range
- $65.25 – $65.25
- Volume
- 0
- Average volume (20 days)
- 304
Total return vs. the S&P 500
Price change plus reinvested dividends, to the close on Oct 19, 2026. The S&P 500 is measured by the SPY fund.
| Period | AILLO | S&P 500 | Difference | AILLO per year | S&P 500 per year |
|---|---|---|---|---|---|
| 1 month | -1.5% | +0.6% | −2.2 pts | ||
| 3 months | -2.5% | +3.4% | −5.9 pts | ||
| Year to date | -0.1% | +13.3% | −13.3 pts | ||
| 1 year | -0.3% | +16.6% | −16.9 pts | ||
| 3 years | +20.8% | +86.4% | −65.5 pts | +6.5% | +23.1% |
| 5 years | -12.1% | +81.9% | −94.0 pts | -2.5% | +12.7% |
| 10 years | +9.5% | +318.9% | −309.4 pts | +0.9% | +15.4% |
Press releases
Releases Ameren Illinois filed with the SEC as exhibits to Form 8-K or 6-K
- Update
- News
- News
- News
- News
- News
About Ameren Illinois
Electric & Other Services Combined
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.
Company profile, executives and historyAmeren Illinois stock: common questions
What is Ameren Illinois's stock price?
AILLO closed at $65.25 on Oct 19, 2026, up 0.00% on the day.
Does Ameren Illinois pay a dividend?
No. Ameren Illinois has not paid a cash dividend over the last twelve months.
How has AILLO stock performed over the past year?
Including dividends, AILLO returned -0.3% over the past year, against +16.6% for the S&P 500.
Who are Ameren Illinois's competitors?
Companies most similar to Ameren Illinois by business, industry and size include AEE, WEC, LNT, NI, EVRG.