AEP vs NGG: American Electric Power Co and National Grid PLC ADR compared
The short version
From the latest prices and each company's SEC filings. Who's ahead on each measure, not which to buy.
- National Grid PLC ADR is the larger company, worth $73.6B, close to American Electric Power Co's $65.4B.
- American Electric Power Co grew revenue faster over the last year (+10.2% vs -7.4%).
- National Grid PLC ADR keeps more of each dollar of revenue as operating profit (26.9% vs 24.1%).
- On earnings, American Electric Power Co is the cheaper stock (17.8x vs 18.5x).
Side by side
The stronger figure is shaded where higher (or, for valuation multiples, lower) reads as better. How the implied growth works.
| Measure | AEP | NGG |
|---|---|---|
| Market cap | $65.4B | $73.6B |
| Share price | $122.81 | $76.48 |
| Revenue (last fiscal year) | $21.9B | $18.4B |
| Free cash flow (last fiscal year) | $3.5B | — |
| Revenue growth, last year | +10.2% | -7.4% |
| Revenue growth per year, last 5 fiscal years | +6.8% | +7.7% |
| Operating margin | 24.1% | 26.9% |
| Net margin | 16.3% | 15.8% |
| Return on equity | 11.5% | 7.7% |
| P/E (trailing) | 17.8x | 18.5x |
| Price / free cash flow | 9.59x | — |
| EV / EBITDA | 13.0x | 13.1x |
| FCF growth the price implies | 4.1% | — |
| Dividend yield | 3.0% | 4.4% |
| Debt / equity | 2.66x | 1.82x |
| Fundamental grade | C | C |
| Superinvestors holding it | 6 | 5 |
| Insider purchases, last 12 months | 4 | 0 |
Results from SEC filings
Revenue and free cash flow by fiscal year, from each company's 10-K filings.
American Electric Power Co
| Year | Revenue | Free cash flow | Op. margin |
|---|---|---|---|
| 2021 | $16.8B | — | 20.3% |
| 2022 | $19.6B | — | 17.7% |
| 2023 | $19.0B | $4.9B | 18.7% |
| 2024 | $19.7B | $6.4B | 21.8% |
| 2025 | $21.9B | $3.5B | 24.3% |
National Grid PLC ADR
| Year | Revenue | Free cash flow | Op. margin |
|---|---|---|---|
| 2021 | $13.7B | — | 17.6% |
| 2022 | $18.4B | — | 23.7% |
| 2023 | $21.7B | — | 22.5% |
| 2024 | $19.9B | — | 22.5% |
| 2025 | $18.4B | — | 26.8% |
Where the revenue comes from
American Electric Power Co · by segments, 2025
VIU$12.8B54%
T&D$6.1B25%
G&M$2.7B11%
AEPTHCo$2.3B10%
National Grid PLC ADR · by segments, 2026
New York$7.6B43%
New England$4.2B24%
UK Electricity Transmission$2.8B16%
UK Electricity Distribution$1.9B11%
National Grid Ventures$1.1B6%
Other$90M1%
Compare them in fullFifteen years of statements, quarterly results, DCF and IRR models, and any number of peers side by side.
Open AEP in InvestinglyQuestions
Which is bigger, American Electric Power Co or National Grid PLC ADR?
National Grid PLC ADR (NGG), at $73.6B against $65.4B.
Is AEP or NGG cheaper?
By trailing P/E, American Electric Power Co (17.8x) is cheaper than National Grid PLC ADR (18.5x). A lower multiple can also mean the market expects less growth.
Which grows faster, AEP or NGG?
American Electric Power Co: revenue grew +10.2% over the last year, against -7.4%.
Prices and ratios as of the last daily update; statements from SEC filings. Information only, not investment advice.