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.
Constellation Energy and Southern Company are similar in size by market cap; Southern Company trades at the lower P/E (21.2 vs 30.5); year to date, Southern Company leads (−1.2% vs −19.3%).
Side by side
| CEG | SO | |
|---|---|---|
| Market cap | $106B | $98.8B |
| Price | $298.07 | $86.17 |
| Today | +4.6% | +0.0% |
| Return YTD | −19.3% | −1.2% |
| Return 1Y | −23.2% | −10.4% |
| Since June 26, 2026 | +12.9% | −11.3% |
| P/E | 30.5 | 21.2 |
| P/S | 3.4 | 3.4 |
| P/B | 3.3 | 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
Constellation EnergyCEG
No US company generates more nuclear power. Its carbon-free baseload increasingly goes to data centre operators on long-term contracts, the clearest case being Microsoft's deal to restart Three Mile Island.
Full CEG 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 CEG & SO comparisons
Other head-to-heads in the Utilities & power producers segment.