Ameren (AEE) vs NiSource (NI)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 7, 2026.
Summary
Ameren (AEE) has outperformed NiSource (NI) over the past year, losing 3.1% versus a loss of 7.0%. Over five years, NI leads with a +62.9% price change compared with +21.8% for AEE. Ameren is the larger company by market cap ($28.05 billion vs $19.44 billion), about 1.4 times the size, while NiSource is growing revenue faster (+23.5% vs +15.4%).
On valuation, Ameren trades at a lower forward P/E (17.5x vs 18.0x for NiSource). Ameren offers the higher dividend yield (2.88% vs 1.43%). Ameren converts more of its revenue into profit, with a net margin of 16.6% versus 14.3%.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | AEE | NI |
|---|---|---|
| Share price | $101.32 | $40.54 |
| Market cap | $28.05B | $19.44B |
| 1-day change | -0.35% | -0.32% |
| YTD return | +1.46% | -2.92% |
| 1-year return | -3.15% | -7.00% |
| 5-year return | +21.81% | +62.94% |
| P/E ratio (TTM) | 17.84 | 21.56 |
| Forward P/E | 17.47 | 18.01 |
| EPS (TTM) | $5.68 | $1.88 |
| Dividend yield | 2.88% | 1.43% |
| Annual dividend | $2.92 | $0.58 |
| Revenue (latest FY) | $8.80B | $6.52B |
| Revenue growth (YoY) | +15.43% | +23.47% |
| Net income (latest FY) | $1.46B | $929.50M |
| Gross margin | — | 75.71% |
| Operating margin | 23.03% | 28.14% |
| Net margin | 16.60% | 14.25% |
| 52-week high | $118.32 | $49.21 |
| 52-week low | $96.57 | $38.42 |
| Distance from 52-week high | -14.37% | -17.62% |
| Analyst consensus | buy | buy |
| Avg. price target upside | +16.34% | +21.19% |
| Average volume | 1.63M | 5.53M |
| Shares outstanding | 276.84M | 479.56M |
| Employees | 8,913 | 7,668 |
| Sector | Utilities | Utilities |
| Industry | Power Generation | Power Generation |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- Ameren offers a meaningfully higher dividend yield (2.88% vs 1.43%).
- NiSource grew revenue faster in its latest fiscal year (+23.47% vs +15.43%).
About Ameren
AEE stock →Ameren Corporation, together with its subsidiaries, operates as a public utility holding company in the United States. The company operates through four segments: Ameren Missouri, Ameren Illinois Electric Distribution, Ameren Illinois Natural Gas, and Ameren Transmission.
Utilities · Power Generation · 8,913 employees
About NiSource
NI stock →NiSource Inc., an energy holding company, operates as a regulated natural gas and electric utility company in the United States. It operates in two segments, Columbia Operations and NIPSCO Operations.
Utilities · Power Generation · 7,668 employees
AEE vs NI FAQ
Which is bigger, Ameren or NiSource?
Ameren (AEE) is larger, with a market capitalization of $28.05B compared with $19.44B for NiSource (NI).
Which stock has performed better over the past year, AEE or NI?
AEE returned -3.15% over the past 12 months, compared with -7.00% for NI (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, AEE or NI?
AEE has the lower trailing P/E at 17.8, versus 21.6 for NI. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Which pays a higher dividend, Ameren or NiSource?
Ameren has the higher yield at 2.88%, compared with 1.43% for NiSource.
Are Ameren and NiSource in the same industry?
Yes. Both are classified in the Power Generation industry within the Utilities sector.