American Electric Powervs.Southern Company
AEP vs SO · 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.
Southern Company is about 1.5× larger than American Electric Power by market cap; American Electric Power trades at the lower P/E (20.1 vs 24.7); year to date, American Electric Power leads (+17.4% vs +9.6%).
Side by side
| AEP | SO | |
|---|---|---|
| Market cap | $73.6B | $108B |
| Price | $135.43 | $95.61 |
| Today | +1.2% | +0.5% |
| Return YTD | +17.4% | +9.6% |
| Return 1Y | +27.7% | +2.5% |
| P/E | 20.1 | 24.7 |
| P/S | 3.4 | 3.7 |
| P/B | 2.3 | 2.9 |
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 →Southern CompanySO
One of the largest US electric and gas utilities, with growing nuclear power (Vogtle).
Full SO profile →More comparisons in Utilities & power producers
See where AEP and SO sit in the full Energy, grid & critical infrastructure map — every segment from suppliers to end markets.Open the Energy value chain →