The short version

From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.

  • Ameren is the larger company, worth $27.6B, close to FirstEnergy's $25.9B.
  • FirstEnergy grew revenue faster over the last year (+11.6% vs -5.8%).
  • Ameren keeps more of each dollar of revenue as operating profit (24.9% vs 14.7%).
  • On earnings, Ameren is the cheaper stock (17.9x vs 24.3x).

Side by side

The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.

MeasureAEEFE
Market cap$27.6B$25.9B
Share price$102.19$45.00
Revenue (last fiscal year)$8.8B$15.1B
Free cash flow (last fiscal year)-$775M-$1.0B
Revenue growth, last year-5.8%+11.6%
Revenue growth per year, last 5 fiscal years+8.3%+7.9%
Operating margin24.9%14.7%
Net margin17.9%6.9%
Return on equity11.4%8.4%
P/E (trailing)17.9x24.3x
Price / free cash flow——
EV / EBITDA11.8x12.9x
FCF growth the price implies——
Dividend yield2.8%3.9%
Debt / equity2.73x3.38x
Fundamental gradeDD
Superinvestors holding it24
Insider purchases, last 12 months20

Results from SEC filings

Revenue and free cash flow by fiscal year, from each company's 10-K filings.

Ameren

YearRevenueFree cash flowOp. margin
2021$6.4B-$1.8B20.8%
2022$8.0B-$1.1B19.0%
2023$7.5B-$1.0B20.8%
2024$7.6B-$1.6B19.9%
2025$8.8B-$775M23.0%

FirstEnergy

YearRevenueFree cash flowOp. margin
2021$11.1B$324M15.5%
2022$12.5B-$165M15.3%
2023$12.9B-$2.0B17.6%
2024$13.5B-$1.1B17.6%
2025$15.1B-$1.0B14.6%

Where the revenue comes from

Ameren · by segments, 2025

Ameren Missouri$4.8B54%
Ameren Illinois Electric Distribution$2.4B27%
Ameren Illinois Gas$968M11%
Ameren Transmission$675M8%

FirstEnergy · by segments, 2025

Distribution$7.5B50%
Integrated$5.7B38%
Integrated$1.9B13%
Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
Open AEE in Investingly

Questions

Which is bigger, Ameren or FirstEnergy?

Ameren (AEE), at $27.6B against $25.9B.

Is AEE or FE cheaper?

By trailing P/E, Ameren (17.9x) is cheaper than FirstEnergy (24.3x). A lower multiple can also mean the market expects less growth.

Which grows faster, AEE or FE?

FirstEnergy: revenue grew +11.6% over the last year, against -5.8%.

Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.