Ameren Illinois Company (AILLM) Fair Value & Analysis
Utilities · US · Market cap $2.0B · ISIN US1536633076
Ameren Illinois Company
AILLM · US
Strengths
Risks
Fair value as of: Aug 13, 2026
From 14 valuation models · updated 15 days ago
Fair value updated Aug 13, 2026, revised from $102.83 to $102.73 (−0.1%) since Jul 14, 2026. Share price −0.8% over the past month.
Below-average quality, trading 23% below our fair value.
What runs behind every stock
69 individual criteria per stock, every one traceable See the method →
What matters now
- Solid quality (45/100) at a price below fair value, the discount is the argument here, not the business quality.
- A fairly wide model range ($71.91 to $133.55) leaves room in how you read the outcome.
Price vs Fair Value (5 years)
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Aug 13, 2026.
How to read this chart
60‑month range $55.20 – $92.17 · fair‑value band $71.91 – $133.55 · the $78.60 price screens below the $102.73 fair value. Dashed = 300-day average. As of Aug 13, 2026.
Analysis
Ameren Illinois Company (AILLM) currently trades at $78.60, while our model-based Fair Value estimate is $102.73, implying the stock looks roughly 30.7% undervalued today. The Quality Score stands at 45/100 (below-average quality), in the Utilities sector. Bull case: trading below our estimate, it may offer upside if the fundamentals hold. Bear case: a low price can be a value trap when quality is weak or the data is thin (evidence: medium), always confirm before acting.
Over the trailing twelve months, Ameren Illinois Company generated revenue of $3.8B at a net margin of 19.9%. Revenue grew 13.4% year over year. It earns a return on equity of 9.8%. Net debt stands at $19.8B. Fundamentals as of Aug 13, 2026
Our scenario range runs from $71.91 (bear case) to $133.55 (bull case); at $78.60, the current price sits within that range. Bear and bull are the same models run on conservative and optimistic assumptions (margins, growth, valuation multiples), so a plausible valuation range, not a price target. The share trades about 4% below its 52-week high and 18% above its 52-week low, currently below its 200-day average. For context, the median of 10 Utilities peers we cover trades at -37% fair-value upside, at 31%, AILLM screens cheaper than that median.
Fair Value models
Each model estimates fair value its own way; the Fair Value above is the evidence-weighted blend. Evidence (0–100) measures how completely this model’s inputs are available: well-fed models carry more weight in the blend. The spread across models is intentional, each one stresses a different value driver; dividend models, for instance, come out structurally low when payout is small.
All 14 models by family
Widest divergence: Multiples ($947.72) versus Asset-Based ($352.76). Highest evidence: Residual Income (76).
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Key figures & financial health
More key figures
Figures from reported company fundamentals · as of Aug 13, 2026. TTM = trailing twelve months.
Quality Score breakdown
Of which business quality 41 · Market factors (momentum, volatility) 52
Non-valuation factor families (profitability, growth, cashflow, financial strength, momentum …), each academically grounded. Valuation itself sits in the Fair Value and is deliberately excluded here to avoid double-counting.
All values are scores from 0 to 100 (100 = best against fixed, research-based bands), not percentages. The three market factors (momentum, 52-week proximity, low volatility) are displayed but carry zero weight in the headline number: market sentiment is not a business property.
About the company
Ameren Illinois Company engages in the rate-regulated electric generation, transmission, and distribution business in Illinois. It also engages in the natural gas distribution business. Ameren Illinois Company was formerly known as Central Illinois Public Service Company and changed its name to Ameren Illinois Company in October 2010.
Full company description
Ameren Illinois Company engages in the rate-regulated electric generation, transmission, and distribution business in Illinois. It also engages in the natural gas distribution business. Ameren Illinois Company was formerly known as Central Illinois Public Service Company and changed its name to Ameren Illinois Company in October 2010. The company was founded in 1902 and is headquartered in Collinsville, Illinois. Ameren Illinois Company operates as a subsidiary of Ameren Corporation.
Company description, as reported by the company or data provider.
Revenue & earnings trend
FY2021 – FY2025 · reported fiscal years
Ameren Illinois Company reported revenue of $8.8B in FY2025 versus $6.4B in FY2021, a compound +8.3%/yr. Reported net income was $1.5B in FY2025, compounding +10.1%/yr from FY2021.
of which total revenue +3.1 pp · buybacks/dilution +3.0 pp
Absolute contributions in percentage points per year; they sum to the EPS growth rate. Start and end points are 3-year averages (details on hover).
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Peer Group
Utilities - Regulated Electric · 155 stocks
How this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.
Valuation Multiples vs Utilities - Regulated Electric median · lower = cheaper
Snowflake
Five quick dimensions, each 0 to 100: VALUE (fair-value potential), FUTURE (revenue growth), PAST (return on equity), HEALTH (low debt), DIVIDEND (yield). Green = this stock, grey = typical sector peer.
Values & ESG
Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.
Similar stocks
10 more Utilities - Regulated Electric stocks, each showing price versus our Fair Value estimate (as of Aug 13, 2026).
| Stock | Price | Fair Value | vs Fair Value |
|---|---|---|---|
| NextEra Energy, Inc NEE | $84.22 | $32.94 | -61% |
| The Southern Company SO | $89.76 | $58.81 | -34% |
| Duke Energy Corporation DUK | $121.89 | $74.89 | -39% |
| National Grid plc NGG | $80.68 | $63.94 | -21% |
| American Electric Power Company AEP | $123.36 | $77.23 | -37% |
| Dominion Energy, Inc D | $66.91 | $46.34 | -31% |
| Entergy Corporation ETR | $107.23 | $52.92 | -51% |
| Xcel Energy Inc XEL | $77.68 | $44.61 | -43% |
| Exelon Corporation EXC | $44.44 | $37.60 | -15% |
| Endesa, S.A ELE | €41.76 | €25.72 | -38% |
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Frequently asked questions
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How we calculate Fair Value
Each company is valued through a stack of independent intrinsic-value models (DCF variants, residual-income, multiples and more), blended into one family-balanced consensus and weighted by how much trustworthy data backs it. A separate quality layer scores the fundamentals. Every input is real reported data, nothing guessed.
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