Start with its own history
At 13.20×, AILLM is 26.6% above its 10-observation annual average. A lower multiple can reflect a lower price, higher earnings, or weaker growth expectations—not necessarily a bargain.
OTC · AILLMRegulated ElectricUpdated Nov 2, 2026
Ameren Illinois Company P/E ratio
Current valuation, historical context, and peer comparisons.
Current P/E ratio
13.20×
26.6% abovethe 10-year annual average
Share price75.25
÷Earnings per share5.7
Price and EPS in quote currency. Calculation details
Investors are paying 13.20 for every 1 of reported earnings per share.
P/E over time
2016 – 2025
Annual P/ESelected-period average 10.43×
3-year average17.10×3 positive annual observations
5-year average12.35×5 positive annual observations
10-year average10.43×10 positive annual observations
Peer median · TTM20.11×8 peers with positive P/E
Historical P/E ratios
Annual period-end data · 16 observations
| Period end | P/E | Change |
|---|---|---|
| Dec 31, 2025 | 14.73× | -55.8% |
| Dec 31, 2024 | 33.33× | +928.2% |
| Dec 31, 2023 | 3.24× | -23.4% |
| Dec 31, 2022 | 4.23× | -31.9% |
| Dec 31, 2021 | 6.21× | -15.3% |
| Dec 31, 2020 | 7.33× | -4.3% |
| Dec 31, 2019 | 7.66× | -0.7% |
| Dec 31, 2018 | 7.71× | -19.5% |
View all 16 annual observations +
| Period end | P/E | Change |
|---|---|---|
| Dec 31, 2017 | 9.58× | -6.4% |
| Dec 31, 2016 | 10.23× | -11.9% |
| Dec 31, 2015 | 11.61× | -6.1% |
| Dec 31, 2014 | 12.36× | -15.8% |
| Dec 31, 2013 | 14.69× | -16.5% |
| Dec 31, 2012 | 17.58× | +50.1% |
| Dec 31, 2011 | 11.71× | +38.9% |
| Dec 31, 2010 | 8.43× | N/M |
Change is relative to the preceding observation. N/M values are excluded from averages.
How AILLM compares
Company P/E vs. peer trailing-12-month ratios
| Company | P/E ratio |
|---|---|
 AILLM This stockAmeren Illinois Company | 13.20× |
 AEEAmeren Corporation | 19.33× |
 UEPCOUnion Electric Company | 15.60× |
 EDConsolidated Edison, Inc. | 19.13× |
 CNPCenterPoint Energy, Inc. | 24.09× |
 WECWEC Energy Group, Inc. | 20.90× |
 PCGPG&E Corporation | 9.75× |
 DTEDTE Energy Company | 21.20× |
 FEFirstEnergy Corp. | 22.72× |
Peers are selected by the data provider. Business models and earnings definitions can differ.
Put the numbers in context
What does AILLM’s P/E tell you?
Compare like with like
The median of the 8 positive peer ratios above is 20.11×. Check growth, margins, debt, and earnings quality before interpreting the gap. A faster-growing business may justify a higher multiple.
Check what drives earnings
One-off gains can temporarily lower P/E; unusual charges can raise it. Reported earnings and forward estimates answer different questions. Pair this view with return on equity and liquidity for a fuller picture.
Keep your research connected
Take AILLM into your spreadsheet
Pull historical P/E into Excel or Google Sheets with Wisesheets. Build your own comparisons alongside the rest of your financial model.
Explore WisesheetsQuarterly P/E · latest quarterLQ selects the latest reported quarter. Requires the Wisesheets add-in. See available data
=WISE("AILLM", "PE Ratio", "LQ")Sources & calculation methodology
Current P/E
Share price 75.25 ÷ EPS 5.7 = 13.20×. Data is supplied by Financial Modeling Prep through Wisesheets. Quote feed updated Nov 2, 2026; this is not a real-time trading quote.
History & averages
Annual and quarterly P/E observations are provided separately from the current quote. Averages use the latest 3, 5, or 10 annual observations, excluding missing and nonpositive ratios. Pre-IPO observations are omitted. These are period-end observations, not daily averages.
Data definitions and limitations
The current quote feed does not specify the exact EPS filing-period end or whether EPS is basic or diluted. We do not label it as forward P/E. Peer ratios are explicitly trailing-12-month (TTM) values. Historical observations do not include independently verified price and EPS inputs. Sources may update on different schedules; rounded inputs can produce small calculation differences. Historical comparisons describe past pricing, not an estimate of fair value.
AILLM P/E ratio: common questions
The essentials behind the numbers.
Ameren Illinois Company's current P/E is 13.20× based on the quote data last updated Nov 2, 2026. It represents the share price divided by reported earnings per share. Prices and earnings may refresh on different schedules.
Annual P/E uses earnings for a completed fiscal year. Trailing-12-month (TTM) P/E uses the latest four quarters, while forward P/E uses forecast earnings. These are not interchangeable. This page labels peer ratios as TTM and shows dated annual or quarterly historical observations; it does not show forward estimates.
N/M means not meaningful: the feed has no positive P/E for that observation. Negative or zero earnings should not be ranked as a low positive valuation multiple. N/M observations are excluded from the averages shown above.
Divide the share price by earnings per share (EPS). For example, a share price of 100 and EPS of 5 gives a P/E of 20×. This page uses the price and EPS supplied together in the quote when both are positive.
Price timestamps, EPS definitions, share classes, adjustments, and fiscal periods can differ. A forward P/E also uses forecast earnings rather than reported earnings. Compare the inputs and as-of dates before comparing two displayed ratios.
Not necessarily. The average describes previous market pricing, not fair value. Changes in earnings quality, growth expectations, debt, accounting, and business risk can justify a different multiple today.