Constellation Energyvs.Southern Company
CEG 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 1.2× larger than Constellation Energy by market cap; year to date, Southern Company leads (+9.6% vs −28.8%).
Side by side
| CEG | SO | |
|---|---|---|
| Market cap | $90.3B | $108B |
| Price | $251.38 | $95.61 |
| Today | +0.3% | +0.5% |
| Return YTD | −28.8% | +9.6% |
| Return 1Y | −19.8% | +2.5% |
| P/E | 23.8 | 24.7 |
| P/S | 3.0 | 3.7 |
| P/B | 2.7 | 2.9 |
Data as of 2026-07-11 · updates daily after U.S. close
The two companies
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 →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 CEG and SO sit in the full Energy, grid & critical infrastructure map — every segment from suppliers to end markets.Open the Energy value chain →