American Electric Powervs.Constellation Energy
AEP vs CEG · both in Utilities & power producers, part of the Energy, grid & critical infrastructure value chain: Electricity utilities and large power producers — from nuclear to renewable portfolios.
Constellation Energy is about 1.2× larger than American Electric Power by market cap; American Electric Power trades at the lower P/E (20.1 vs 23.8); year to date, American Electric Power leads (+17.4% vs −28.8%).
Side by side
| AEP | CEG | |
|---|---|---|
| Market cap | $73.6B | $90.3B |
| Price | $135.43 | $251.38 |
| Today | +1.2% | +0.3% |
| Return YTD | +17.4% | −28.8% |
| Return 1Y | +27.7% | −19.8% |
| P/E | 20.1 | 23.8 |
| P/S | 3.4 | 3.0 |
| P/B | 2.3 | 2.7 |
Data as of 2026-07-11 · updates daily after U.S. close
The two companies
American Electric PowerAEP
One of the largest US electricity transmission networks, covering 11 states.
Full AEP profile →Constellation EnergyCEG
The largest US nuclear power producer — delivering CO2-free baseload power, including via long-term agreements with data centres (Three Mile Island restart for Microsoft).
Full CEG profile →More comparisons in Utilities & power producers
See where AEP and CEG sit in the full Energy, grid & critical infrastructure map — every segment from suppliers to end markets.Open the Energy value chain →