Ameren Corp is a regulated electric and gas utility with generally stable earnings and conservative leverage (debt-to-equity 0.5162) alongside multi-year equity compounding (book value per share CAGR 9.76%).
The company shows pronounced strengths in margin and cash generation: trailing twelve‑month gross margin is 52.7% and reported net profit margin is 38.0%, reflecting strong top-line economics even as operating margin sits separately (see Profit Margin Trends). Reported net income rose from $1.19B at 2024 year‑end to $1.46B at 2025 year‑end, and operating cash flow (TTM) was $2.17B in the most recently reported TTM datapoint, underlining cash generation capacity (Revenue & Net Income, Strategic Capital Allocation). On the per‑share front, diluted EPS increased from $4.61 to $5.67 year‑over‑year (23.1% 1‑year EPS growth) and revenue per share recently measured $19.61 with multi‑year revenue‑per‑share growth above 10% in the provided signal (EPS Diluted & Revenue per Share). This illustrates recovery in per‑share metrics (Revenue & EPS Growth).
Notable weaknesses include liquidity and margin volatility: the current ratio is 0.8014, below 1.0, which highlights a short‑term liquidity constraint, and operating margin was negative at -0.5% in the most recent trailing twelve‑month reading despite high gross and net margins (see Profit Margin Trends). Revenue and quarterly results have been highly variable — a large negative revenue quarter of -$2.56B at 2024‑12‑31 swung to $2.43B at 2025‑12‑31 before quarter‑to‑quarter movements continued — which increases execution risk around timing and smoothing of results (Revenue & Net Income). Return on equity also remains subdued relative to prior peaks, with the most recent reported ROE at 4.3% (Return on Equity (ROE)).
Key fundamentals to watch going forward are operating margin (currently -0.5%) and the stability of operating cash flow (most recent OCF TTM $2.17B) to confirm earnings convert to cash (Profit Margin Trends; Strategic Capital Allocation); revenue‑per‑share and diluted EPS trajectories (revenue/share $19.61; EPS $5.67; 1‑year EPS growth 23.1%) for sustained growth trends (EPS Diluted & Revenue per Share; Revenue & EPS Growth); and short‑term liquidity and capital structure metrics such as the current ratio (0.8014) and debt‑to‑equity (0.5162), together with the P/E trend (17.6x most recently) as a monitor of market‑level expectations (Earnings Quality Analysis; Price-to-Earnings (PE) Ratio Trend).
The foundation of business quality and long-term value creation
AMEREN CORP's quarterly revenue has been volatile in recent periods. After a negative $2.56B quarter at 2024-12-31, revenues recovered to $453.0M (2025-03-31) and $843.0M (2025-06-30), dipped to $117.0M (2025-09-30), then rose sharply to $2.43B (2025-12-31) and most recently measured $1.66B (2026-03-31). Notable inflection points are the large negative revenue reading in 2024-12-31 and the sharp swing from $117.0M (2025-09-30) to $2.43B (2025-12-31).
Net income has increased in the most recently reported period, with $1.46B reported for 2025-12-31, up from $730.0M at 2024-12-31 and earlier quarters of $457.0M (2024-09-30) and $494.0M (2023-09-30). The most recent quarterly revenue was $1.66B (2026-03-31) and the most recent reported net income was $1.46B (2025-12-31).
Why Growth Matters
Consistent revenue and earnings growth are the lifeblood of successful long-term investments. Companies that can grow their top line (revenue) and bottom line (net income) over many years demonstrate they have products or services customers value and are willing to pay for repeatedly.
Revenue Growth shows whether the company is expanding its market reach, gaining market share, or successfully launching new products.Net Income Growth demonstrates the company can convert that revenue into actual profits while managing costs effectively.
Look for steady, sustainable growth rather than erratic spikes. The best businesses compound earnings year after year, creating tremendous value for shareholders over time. Companies that can grow earnings faster than revenue are improving their profitability—a sign of operational excellence and competitive strength.
Year-over-year growth rates for revenue and earnings per share
Reading the Growth Rate Chart
This chart converts the absolute per-share figures into year-over-year percentage changes, making it easy to see whether growth is accelerating, decelerating, or reverting to trend — regardless of the company's absolute size.
Revenue per Share Growth (1-year, split-adjusted) measures how quickly the top line is expanding on a per-share basis. Sustained positive growth signals that the company continues to win customers and grow its addressable market.EPS Diluted Growth (1-year, split-adjusted) measures how quickly earnings are compounding for each shareholder. When EPS growth consistently outpaces revenue growth, operating leverage and margin expansion are at work.
Look for consistency, not just magnitude. A company that reliably grows EPS 10–15% per year is far more valuable than one that alternates between 50% spikes and deep contractions. Negative EPS growth during a period of positive revenue growth is a red flag — costs are rising faster than sales. Quarters where both lines converge near zero or go negative deserve close scrutiny.
How revenue converts to net income for the most recent annual period
Over the period Jan 2025 to Dec 2025, Ameren Corp converts approximately 53¢ of every revenue dollar into gross profit (gross margin: 52.7%).After accounting for operating expenses and taxes and expenses, the company retains 38.0% as net profit margin, resulting in $1.46B in net earnings.
Period Information
Report Type: Annual (10-K)
Period: Jan 2025 to Dec 2025
Revenue composition by disclosure category for the latest period
Item 1 (Business) includes a section titled Business Segments.
Item 1 (Business) includes a section titled Rates and Regulation.
Item 1 (Business) includes a section titled Transmission.
Item 1 (Business) includes a section titled Supply of Electric Power.
Item 1 (Business) includes a section titled Power Generation.
Item 1 (Business) includes a section titled Renewable Energy and Zero Emission Standards.
Item 1 (Business) includes a section titled Customer Energy-Efficiency Programs.
Item 1 (Business) includes a section titled Natural Gas Supply for Distribution.
Only sections explicitly present in the provided Item 1 excerpt are listed above. The excerpt did not provide text describing customers, geographies, distribution channels, revenue recurrence, or concentration risks.
Analyzing long-term margin stability and competitive positioning
AMEREN CORP's most recent reported trailing-twelve-month margins (period ending 2025-12-31) show a 52.7% gross margin, a -0.5% operating margin, and a 38.0% net profit margin.
Over the longer horizon in the provided data, net profit margin has increased from 1.8% in 2010 to 14.1% in 2019 and to 38.0% in 2025, indicating a rising net profitability in the sampled years.
Notable inflection points in the dataset include very large outlier values in 2022 (gross margin 651.4% and operating margin 153.2%) that contrast sharply with the 2025 results, particularly the shift in operating margin from 153.2% in 2022 to -0.5% in 2025. The most recent gross margin was 52.7%, the most recent operating margin was -0.5%, and the most recent net profit margin was 38.0%.
Understanding Profit Margins
Between Jan 2025 and Dec 2025, Ameren Corp converts every dollar of revenue through the following stages:
Sustainable competitive advantages reveal themselves through consistently superior profit margins over extended periods. Companies with durable economic moats maintain pricing power and operational efficiency that competitors struggle to match.
A sign of durable competitive advantage is earning sustained higher margins than competitors.Look for margins that remain stable or improve over time, especially during economic downturns. Declining margins may signal increasing competition, pricing pressure, or deteriorating business fundamentals.
Comparing reported earnings to actual cash generation
AMEREN CORP's trailing twelve‑month net income shows an upward trend in the most recent data: net income rose from $1.19B at the 2024 year end to $1.46B at the 2025 year end. Over the multi‑year history provided, net income increased from $834M in 2019 and $995M in 2021 to the current level, indicating gradual growth with notable inflection points around 2019→2021 and 2024→2025.
Operating cash flow (TTM) is provided only for the period ending 2018, at $2.17B; no later operating cash flow TTM datapoints are included in the dataset. The most recent Net Income (TTM) is $1.46B (period end 2025-12-31). The most recent Operating Cash Flow (TTM) datapoint provided is $2.17B (period end 2018-12-31).
The Earnings vs. Cash Flow Gap
Reported earnings (Net Income) doesn't always reflect actual cash generation. Companies use accrual accounting, which recognizes revenue when earned and expenses when incurred—not when cash actually changes hands. This creates timing differences and opportunities for accounting discretion that can mask underlying business health.
Net Income (the "earnings" number) can be influenced by non-cash items like depreciation, stock-based compensation, and changes in accounting estimates.Operating Cash Flow, however, shows the actual cash the business generates from its core operations—a harder number to manipulate.
Trailing Twelve Months
What to Look For
Key Insight: Companies with durable competitive advantages typically show operating cash flow that meets or exceeds net income over time, demonstrating they convert accounting profits into actual cash that can be returned to shareholders or reinvested in the business.
Measuring management's efficiency at generating profits from shareholder capital
AMEREN CORP’s reported ROE increased from 1.8% at year-end 2010 to 8.7% at year-end 2014 and peaked at 9.2% at year-end 2016, showing an upward trend through 2016. After 2016 there is a clear inflection: ROE declined to 4.3% by year-end 2019, reversing the prior gains.
The most recent observation shows ROE well below the mid‑2010s peak and below common high‑ROE thresholds cited in the dataset background. The most recent Return on Equity, as of 2019-12-31, was 4.3%.
The Gold Standard of Profitability
Return on Equity (ROE) is a powerful measure of how effectively a company's management is using the money shareholders have invested. Calculated by dividing Net Income by Shareholders' Equity, it reveals how much profit is generated for every dollar of equity capital.
A consistently high ROE (typically above 15-20%) is often the signature of a "quality" business with a durable competitive advantage. It indicates that the company can generate high returns on its own capital, which it can then reinvest at these high rates to compound value over time.
What to Look For:
How the company generates and deploys its cash
AMEREN CORP’s trailing twelve‑month operating cash flow is shown at a strong level in the most recent available data, with Operating Cash Flow (TTM) of $2.17B as of period ending 2018-12-31.
Financing cash flow has moved materially lower in the latest quarter compared with year-end 2018, declining from $205.0M at 2018-12-31 to $36.0M at 2019-03-31; historically the company swung from large financing outflows in 2010–2011 (around -$800M) to positive financing inflows through the mid‑2010s before this recent decline.
The provided dataset does not include a trailing twelve‑month investing cash flow value, so no Investing Cash Flow (TTM) is reported here. The most recent Operating Cash Flow (TTM) observed was $2.17B (period ending 2018-12-31). The most recent Financing Cash Flow (TTM) observed was $36.0M (period ending 2019-03-31).
Understanding Company Strategy
Capital allocation refers to how management decides to spend and invest the company's cash. Analyzing the three primary categories of cash flow reveals a company's true operational strategy:
What to look for: Is the company bootstrapping (funding growth solely from operating cash)? Are they borrowing to fund aggressive expansion or dividends? Or are they capital raising by issuing new shares, potentially diluting your ownership? A healthy, mature company typically generates strong operating cash, moderately invests in growth, and returns the surplus to shareholders through financing activities.
Trailing Twelve Months
Net assets attributable to each share — the accounting floor of intrinsic value
Why Book Value per Share Matters
Book value per share is the net worth of the company — total assets minus total liabilities — divided by shares outstanding (split-adjusted). It represents the theoretical liquidation value per share if every asset were sold and every liability repaid at balance-sheet carrying values. It is the accounting foundation upon which much of equity valuation is built.
A steadily rising book value per share is one of the most reliable signals of compounding wealth creation. It means the company is retaining earnings and building net worth faster than it is returning capital or eroding it. Warren Buffett famously tracked Berkshire Hathaway's book value per share for decades as his primary measure of intrinsic value growth.
Context is essential. Asset-heavy businesses (banks, manufacturers, utilities) should be judged by book value more directly than asset-light businesses (software, consumer brands), where intangible assets like intellectual property and customer loyalty may far exceed their balance-sheet carrying values. A company trading at a large premium to book value is not necessarily overvalued — it may simply possess competitive advantages that accounting rules do not capture. Conversely, a declining book value per share — especially over multiple years — is a serious warning sign of capital destruction.
How much of the company is financed by debt versus shareholders' equity
Reading the Debt-to-Equity Ratio
The debt-to-equity (D/E) ratio compares total financial debt to shareholders' equity. A ratio of 1.0 means the company has borrowed one dollar for every dollar of equity; a ratio of 2.0 means it has borrowed twice as much as it owns. Financial leverage amplifies both returns and risk: in good times, debt turbocharges equity returns; in bad times, it accelerates losses and can threaten solvency.
Trends matter more than a single number. A rising D/E ratio can mean the company is taking on debt to fund growth — potentially value-creating if returns exceed the cost of capital. But it can also mean equity is being eroded through losses or that the business is borrowing simply to sustain operations. A falling D/E ratio generally reflects strengthening financial health: earnings are being retained, debt maturities are being paid down, or both.
Industry norms vary enormously. Capital-intensive sectors (utilities, real estate, financials) routinely carry high D/E ratios that would be alarming in, say, a technology company. Always compare against sector peers. As a rough rule of thumb, a D/E above 2× in a cyclical business warrants careful scrutiny of interest coverage and refinancing risk.
Short-term liquidity — can the company cover its near-term obligations?
Liquidity: Can the Business Pay Its Bills?
The current ratio is calculated as current assets divided by current liabilities. A ratio of 1.5 means the company has $1.50 of short-term assets — cash, receivables, inventory — for every $1.00 of obligations due within the next twelve months. It is the most direct measure of near-term financial resilience: can the business meet its obligations without needing to raise new capital or sell long-term assets at a discount?
A ratio above 1.0 is generally healthy, meaning current assets exceed current liabilities. A ratio consistently above 2.0 may indicate the company is holding excess cash or inventory that could be deployed more productively. A ratio below 1.0 is a warning sign — the company is relying on future cash generation or external financing to cover its near-term obligations, which is manageable in normal conditions but dangerous during a downturn.
Trends and context matter.A declining current ratio isn't always alarming — highly efficient businesses (e.g., large retailers with reliable daily cash flows) often run leaner balance sheets intentionally. Conversely, a rapidly rising current ratio can signal slowing sales causing inventory to build, or customers taking longer to pay. Always compare the trend against industry peers and cross-reference with the cash flow statement to assess whether the business is genuinely liquid or just holding non-cash current assets.
How much the market is paying for each dollar of company earnings
AMEREN CORP’s trailing twelve‑month P/E shows a long-term decline from a 2010 peak of 52.2x to the low‑20s through the 2014–2021 period (20.3x in 2014, 20.7x in 2016, 23.7x in 2019, 23.0x in 2021), marking a substantial reduction from the 2010 level and relative stability around the 20–24x range across mid‑decade through 2021. Notable inflection points in the provided series include the sharp drop between 2010 and 2014 and the subsequent plateau in the early 2010s.
More recent data show a contraction in the P/E from 19.3x at the 2024 year end to 17.6x at the 2025 year end, bringing the ratio below the prior mid‑teens/low‑20s plateau. The most recent P/E ratio was 17.6x.
What Is the PE Ratio?
The Price-to-Earnings (PE) ratio is one of the most widely used valuation metrics in investing. It divides the current stock price by the company's earnings per share (EPS), revealing how much investors are willing to pay for each dollar of earnings. A high PE can signal that the market expects strong future growth, while a low PE may suggest undervaluation—or reflect genuine concerns about the company's prospects.
Context matters:PE ratios vary significantly across industries. High-growth technology companies routinely trade at PE ratios above 30x or 40x, while mature, low-growth sectors like utilities or financials often trade closer to 10–15x. Always compare a company's PE to its own history and its industry peers, not just an absolute number.
What to Look For:
Key Insight:The PE ratio is a snapshot of market sentiment and expectations. Tracking it over time alongside earnings trends reveals whether the market's valuation has expanded or contracted—and whether that change is justified by fundamentals.