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Side-by-side financial comparison of Ameren (AEE) and Montauk Renewables, Inc. (MNTK). Click either name above to swap in a different company.
Ameren is the larger business by last-quarter revenue ($1.8B vs $43.4M, roughly 41.1× Montauk Renewables, Inc.). Ameren runs the higher net margin — 14.2% vs 5.7%, a 8.5% gap on every dollar of revenue. On growth, Montauk Renewables, Inc. posted the faster year-over-year revenue change (56.7% vs -8.2%). Montauk Renewables, Inc. produced more free cash flow last quarter ($-41.1M vs $-54.0M). Over the past eight quarters, Montauk Renewables, Inc.'s revenue compounded faster (5.8% CAGR vs -0.9%).
Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. It operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission. The company engages in the rate-regulated electric generation, transmission, and distribution activities; and rate-regulated natural gas distribution and transmission businesses. It primarily generates electricity through coal, nucle...
Montauk Renewables, Inc. is a US-based renewable energy firm specializing in capturing and converting biogenic methane from landfills and agricultural waste into renewable natural gas (RNG) and low-carbon electricity. It serves utility, commercial, and industrial customers across North America, with operations focused on advancing decarbonization and sustainable energy transition goals.
AEE vs MNTK — Head-to-Head
Income Statement — Q4 2025 vs Q4 2025
| Metric | | |
|---|---|---|
| Revenue | $1.8B | $43.4M |
| Net Profit | $253.0M | $2.5M |
| Gross Margin | — | — |
| Operating Margin | 20.2% | -3.8% |
| Net Margin | 14.2% | 5.7% |
| Revenue YoY | -8.2% | 56.7% |
| Net Profit YoY | 21.6% | 129.5% |
| EPS (diluted) | $0.92 | $0.01 |
Green = leading value per metric. Periods may differ when fiscal calendars don't align.
8-Quarter Revenue & Profit Trend
Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.
| Q4 25 | $1.8B | $43.4M | ||
| Q3 25 | $2.7B | $45.3M | ||
| Q2 25 | $2.2B | $45.1M | ||
| Q1 25 | $2.1B | $42.6M | ||
| Q4 24 | $1.9B | $27.7M | ||
| Q3 24 | $2.2B | $65.9M | ||
| Q2 24 | $1.7B | $43.3M | ||
| Q1 24 | $1.8B | $38.8M |
| Q4 25 | $253.0M | $2.5M | ||
| Q3 25 | $641.0M | $5.2M | ||
| Q2 25 | $277.0M | $-5.5M | ||
| Q1 25 | $290.0M | $-464.0K | ||
| Q4 24 | $208.0M | $-8.5M | ||
| Q3 24 | $457.0M | $17.0M | ||
| Q2 24 | $260.0M | $-712.0K | ||
| Q1 24 | $262.0M | $1.9M |
| Q4 25 | — | — | ||
| Q3 25 | — | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | — | — | ||
| Q3 24 | — | 43.8% | ||
| Q2 24 | — | 15.6% | ||
| Q1 24 | — | 22.8% |
| Q4 25 | 20.2% | -3.8% | ||
| Q3 25 | 30.6% | 9.8% | ||
| Q2 25 | 18.5% | -5.2% | ||
| Q1 25 | 20.5% | 1.0% | ||
| Q4 24 | 10.2% | -35.5% | ||
| Q3 24 | 27.0% | 34.4% | ||
| Q2 24 | 21.3% | 2.0% | ||
| Q1 24 | 20.4% | 6.1% |
| Q4 25 | 14.2% | 5.7% | ||
| Q3 25 | 23.7% | 11.5% | ||
| Q2 25 | 12.5% | -12.2% | ||
| Q1 25 | 13.8% | -1.1% | ||
| Q4 24 | 10.7% | -30.5% | ||
| Q3 24 | 21.0% | 25.9% | ||
| Q2 24 | 15.4% | -1.6% | ||
| Q1 24 | 14.4% | 4.8% |
| Q4 25 | $0.92 | $0.01 | ||
| Q3 25 | $2.35 | $0.04 | ||
| Q2 25 | $1.01 | $-0.04 | ||
| Q1 25 | $1.07 | $0.00 | ||
| Q4 24 | $0.77 | $-0.05 | ||
| Q3 24 | $1.70 | $0.12 | ||
| Q2 24 | $0.97 | $-0.01 | ||
| Q1 24 | $0.98 | $0.01 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $13.0M | $23.8M |
| Total DebtLower is stronger | $19.4B | $126.0M |
| Stockholders' EquityBook value | $13.4B | $263.1M |
| Total Assets | $48.5B | $435.5M |
| Debt / EquityLower = less leverage | 1.45× | 0.48× |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $13.0M | $23.8M | ||
| Q3 25 | $9.0M | $6.8M | ||
| Q2 25 | $11.0M | $29.1M | ||
| Q1 25 | $23.0M | $40.1M | ||
| Q4 24 | $7.0M | $45.6M | ||
| Q3 24 | $17.0M | $55.0M | ||
| Q2 24 | $19.0M | $42.3M | ||
| Q1 24 | $85.0M | $63.3M |
| Q4 25 | $19.4B | $126.0M | ||
| Q3 25 | — | $54.9M | ||
| Q2 25 | — | $57.8M | ||
| Q1 25 | — | $40.8M | ||
| Q4 24 | $17.8B | $43.8M | ||
| Q3 24 | — | $46.7M | ||
| Q2 24 | — | $49.7M | ||
| Q1 24 | — | $52.7M |
| Q4 25 | $13.4B | $263.1M | ||
| Q3 25 | $12.8B | $260.7M | ||
| Q2 25 | $12.3B | $254.7M | ||
| Q1 25 | $12.2B | $258.2M | ||
| Q4 24 | $12.1B | $257.4M | ||
| Q3 24 | $11.8B | $275.3M | ||
| Q2 24 | $11.5B | $255.3M | ||
| Q1 24 | $11.4B | $254.3M |
| Q4 25 | $48.5B | $435.5M | ||
| Q3 25 | $47.4B | $383.3M | ||
| Q2 25 | $46.6B | $382.5M | ||
| Q1 25 | $45.7B | $354.2M | ||
| Q4 24 | $44.6B | $349.0M | ||
| Q3 24 | $43.3B | $374.1M | ||
| Q2 24 | $42.3B | $362.0M | ||
| Q1 24 | $41.3B | $354.7M |
| Q4 25 | 1.45× | 0.48× | ||
| Q3 25 | — | 0.21× | ||
| Q2 25 | — | 0.23× | ||
| Q1 25 | — | 0.16× | ||
| Q4 24 | 1.47× | 0.17× | ||
| Q3 24 | — | 0.17× | ||
| Q2 24 | — | 0.19× | ||
| Q1 24 | — | 0.21× |
Cash Flow & Capital Efficiency
How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.
| Metric | | |
|---|---|---|
| Operating Cash FlowLast quarter | $956.0M | $337.0K |
| Free Cash FlowOCF − Capex | $-54.0M | $-41.1M |
| FCF MarginFCF / Revenue | -3.0% | -94.7% |
| Capex IntensityCapex / Revenue | 56.7% | 95.5% |
| Cash ConversionOCF / Net Profit | 3.78× | 0.14× |
| TTM Free Cash FlowTrailing 4 quarters | $-775.0M | $-86.2M |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $956.0M | $337.0K | ||
| Q3 25 | $1.1B | $12.7M | ||
| Q2 25 | $862.0M | $8.2M | ||
| Q1 25 | $431.0M | $9.1M | ||
| Q4 24 | $817.0M | $724.0K | ||
| Q3 24 | $897.0M | $28.6M | ||
| Q2 24 | $557.0M | $193.0K | ||
| Q1 24 | $492.0M | $14.3M |
| Q4 25 | $-54.0M | $-41.1M | ||
| Q3 25 | $116.0M | $-17.2M | ||
| Q2 25 | $-204.0M | $-25.5M | ||
| Q1 25 | $-633.0M | $-2.5M | ||
| Q4 24 | $-473.0M | $-8.3M | ||
| Q3 24 | $-240.0M | $16.0M | ||
| Q2 24 | $-445.0M | $-18.6M | ||
| Q1 24 | $-398.0M | $-7.7M |
| Q4 25 | -3.0% | -94.7% | ||
| Q3 25 | 4.3% | -37.9% | ||
| Q2 25 | -9.2% | -56.4% | ||
| Q1 25 | -30.2% | -5.8% | ||
| Q4 24 | -24.4% | -29.8% | ||
| Q3 24 | -11.0% | 24.3% | ||
| Q2 24 | -26.3% | -42.9% | ||
| Q1 24 | -21.9% | -19.8% |
| Q4 25 | 56.7% | 95.5% | ||
| Q3 25 | 36.6% | 65.9% | ||
| Q2 25 | 48.0% | 74.6% | ||
| Q1 25 | 50.7% | 27.3% | ||
| Q4 24 | 66.5% | 32.5% | ||
| Q3 24 | 52.3% | 19.1% | ||
| Q2 24 | 59.2% | 43.3% | ||
| Q1 24 | 49.0% | 56.7% |
| Q4 25 | 3.78× | 0.14× | ||
| Q3 25 | 1.72× | 2.43× | ||
| Q2 25 | 3.11× | — | ||
| Q1 25 | 1.49× | — | ||
| Q4 24 | 3.93× | — | ||
| Q3 24 | 1.96× | 1.68× | ||
| Q2 24 | 2.14× | — | ||
| Q1 24 | 1.88× | 7.73× |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
AEE
Segment breakdown not available.
MNTK
| Natural Gas Environmental Attributes | $28.1M | 65% |
| Natural Gas Commodity | $10.7M | 25% |
| Electric Commodity | $2.7M | 6% |
| Electric Environmental Attributes | $2.0M | 5% |
