Grade: F — Major Red Flags
Framework: Schilit *Financial Shenanigans* + Beneish M-Score + forensic accounting principles
Data: SEC EDGAR 10-K (Filed 2026-02-18, FY ended December 31, 2025) + Yahoo Finance
Auditor: PricewaterhouseCoopers LLP — Unqualified opinion
One-line verdict: Ameren is a regulated utility with 4 red flags — the highest count in this cohort — driven by structural features of the utility business model rather than fraud signals. Accounts receivable outpaced revenue for 2 consecutive years, FCF has been negative for 3+ consecutive years (the company spends $4.2B+ annually on infrastructure while generating $3.4B CFFO), cash of $13M covers 0% of $19.8B debt, and FCF after acquisitions has been negative for 3 consecutive years. The M-Score is unavailable due to insufficient data, and the Z-Score of 0.91 sits deep in the distress zone. However, every one of these flags reflects the regulated utility business model: heavy CapEx funded by rate base growth, debt funded by regulated cost recovery, and minimal cash holdings because the parent company funds subsidiaries through intercompany transactions. The real question is whether Ameren's regulators (MoPSC and ICC) will continue granting rate increases sufficient to earn on its growing rate base.
| Metric | Result |
|---|---|
| ❌ Red Flags | **4** (AR outpacing revenue 2 years, negative FCF 3 years, cash 0% of debt, serial negative FCF after acquisitions) |
| ⚠️ Watch Items | **1** (Debt/EBITDA 4.9x) |
| Checks Completed | **15/18** (3 N/A: SG&A, impairment, M-Score) |
| Beneish M-Score | **N/A** (insufficient data) |
| Auditor | PricewaterhouseCoopers LLP — Unqualified opinion |
A Regulated Utility Holding Company
Ameren operates through three regulated subsidiaries: Ameren Missouri (Union Electric Company), Ameren Illinois (electric distribution and gas), and ATXI (Ameren Transmission Company of Illinois). Per the 10-K, "Ameren is a holding company; therefore, its primary assets are its investments in the common stock of its subsidiaries."
The filing identifies four reporting segments aligned with these subsidiaries. Revenue is rate-regulated: "base rates include increases or decreases in operating revenues related to the revenue requirement reconciliation adjustment under the MYRP and formula rates." Ameren's profitability depends entirely on regulatory outcomes — the MoPSC for Missouri operations and the ICC for Illinois operations.
Goodwill detail from the 10-K: "$238 million, $80 million, and $93 million" allocated across Ameren Missouri, Ameren Illinois, and Ameren Transmission segments.
Key Financials
| Metric | FY2022 | FY2023 | FY2024 | FY2025 | Trend |
|---|---|---|---|---|---|
| Revenue | $8.0B | $7.5B | $7.6B | $8.8B | +15.4% |
| Net Income | $1.1B | $1.2B | $1.2B | $1.5B | Steady growth |
| Gross Margin | 42.0% | 46.2% | 47.9% | 47.4% | Stable |
| Net Margin | 13.5% | 15.4% | 15.5% | 16.5% | Expanding |
| ROE | 10.2% | 10.2% | 9.8% | 10.9% | Typical regulated utility |
| CFFO/NI | 2.11x | 2.23x | 2.34x | 2.30x | Consistent |
ROE around 10% is characteristic of regulated utilities earning their allowed return on equity. The filing discloses dividends of "$2.84 per common share" in FY2025, up from "$2.68" in FY2024 and "$2.52" in FY2023.
Cash Flow: The Regulated Utility CapEx Treadmill
| Metric | FY2022 | FY2023 | FY2024 | FY2025 |
|---|---|---|---|---|
| Operating Cash Flow | $2.3B | $2.6B | $2.8B | $3.4B |
| CapEx | $3.4B | $3.8B | $4.4B | $4.2B |
| Free Cash Flow | -$1.1B | -$1.2B | -$1.6B | -$0.8B |
| Dividends | — | — | — | — |
| New Debt Issued | — | — | — | $500M (Ameren Missouri) |
| Cash Balance | $250M | $25M | $7M | $13M |
Negative FCF is the defining characteristic of growth-stage regulated utilities. Ameren invests $4B+ annually in transmission, distribution, and generation infrastructure, recovers the investment through regulated rate base growth, and funds the CapEx gap with debt issuance. Per the 10-K, "Ameren Missouri issued $500 million" of debt in April 2025, and "Ameren (parent)'s 2.50% senior unsecured notes matured" in September 2024 and were "repaid with commercial paper borrowings."
The pension plan is well-funded: "Ameren's pension and postretirement benefit plans were overfunded by $954 million as of December 31, 2025."
The 18-Point Screening
Revenue Quality
| # | Check | Result | Detail |
|---|---|---|---|
| A1 | DSO Change | ✅ Pass | DSO 28 days, +2 days YoY — stable |
| A2 | AR vs Revenue Growth | ❌ Fail | AR outpaced revenue for 2 consecutive years |
| A3 | Revenue vs CFFO | ✅ Pass | Revenue +15.4%, CFFO +21.4% — cash growing faster |
The A2 fail reflects regulatory timing: rate adjustments create receivable spikes as new rates take effect before collections catch up. For a regulated utility with formula rate recovery, this is mechanical rather than suspicious.
Expense Quality
| # | Check | Result | Detail |
|---|---|---|---|
| B1 | Inventory vs COGS | ✅ Pass | Inventory +1.6% vs COGS +16.6% — COGS growing faster |
| B2 | CapEx vs Revenue | ✅ Pass | CapEx -5.4% vs revenue +15.4% — declining CapEx, unusual |
| B3 | SG&A Ratio | N/A | Insufficient data for regulated utility structure |
| B4 | Gross Margin | ✅ Pass | Gross margin 47.4%, -0.5pp — effectively flat |
Cash Flow Quality
| # | Check | Result | Detail |
|---|---|---|---|
| C1 | CFFO vs Net Income | ✅ Pass | CFFO/NI 2.30x — very strong |
| C2 | Free Cash Flow | ❌ Fail | Negative FCF for 3+ consecutive years |
| C3 | Accruals Ratio | ✅ Pass | Accruals ratio -3.9% — clean |
| C4 | Cash vs Debt | ❌ Fail | Cash $13M covers 0% of $19.8B debt |
Balance Sheet Quality
| # | Check | Result | Detail |
|---|---|---|---|
| D1 | Goodwill + Intangibles | ✅ Pass | $411M goodwill = 3% of equity — minimal |
| D2 | Leverage | ⚠️ Watch | Debt/EBITDA 4.9x (>4x), interest coverage 2.6x |
| D3 | Soft Asset Growth | ✅ Pass | Other assets +8.7% vs revenue +15.4% |
| D4 | Asset Impairment | N/A | No write-off data |
The Debt/EBITDA of 4.9x and interest coverage of 2.6x are at the edge for investment-grade utilities. Regulators typically allow utilities to maintain leverage in the 4-5x range because the regulated cash flows provide predictable debt service. If interest coverage falls below 2.5x, rating agency pressure would intensify.
Acquisition Risk
| # | Check | Result | Detail |
|---|---|---|---|
| E1 | Serial Acquirer FCF | ❌ Fail | FCF after acquisitions negative for 3 consecutive years |
| E2 | Goodwill Surge | ✅ Pass | Goodwill flat YoY |
Manipulation Score
| # | Check | Result | Detail |
|---|---|---|---|
| F1 | Beneish M-Score | N/A | Insufficient data |
Altman Z-Score: 0.91 (distress zone) | F-Score: 0.43 (low manipulation probability 0.16%)
Key Risks from the 10-K
Summary
Ameren's F grade with 4 red flags is the most mechanically unfavorable in this cohort, but every flag is a structural feature of the regulated utility model, not an earnings quality concern. Negative FCF is how utilities grow rate base. Near-zero cash is standard because parent companies fund through intercompany accounts. High leverage is allowed by regulators because cash flows are contractually stable. AR outpacing revenue reflects rate adjustment timing. The genuine risk is not fraud but regulatory: if the MoPSC or ICC reduces allowed returns, raises disallowance rates on CapEx, or delays rate case outcomes, Ameren's financial model breaks. The $954M pension overfunding is a rare positive, and the F-Score of 0.43 confirms extremely low manipulation probability. Investors should monitor the Debt/EBITDA (4.9x) and interest coverage (2.6x) — both are at levels where further deterioration would trigger rating agency concern.