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; year to date, American Electric Power leads (+5.9% vs −1.2%).
Side by side
| AEP | SO | |
|---|---|---|
| Market cap | $66.9B | $98.8B |
| Price | $122.81 | $86.17 |
| Today | +0.4% | +0.0% |
| Return YTD | +5.9% | −1.2% |
| Return 1Y | +3.3% | −10.4% |
| Since June 26, 2026 | −11.4% | −11.3% |
| P/E | 21.3 | 21.2 |
| P/S | 3.0 | 3.4 |
| P/B | 2.1 | 2.5 |
Data as of 2026-10-09 · updates daily after U.S. close
Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.
The two companies
American Electric PowerAEP
Regulated transmission and distribution wires across 11 states, one of the largest such networks in the US.
Full AEP profile →Southern CompanySO
Vogtle is adding nuclear output to what is already one of the biggest US electric and gas utilities.
Full SO profile →More AEP & SO comparisons
Other head-to-heads in the Utilities & power producers segment.