Constellation Energy (CEG)
Constellation Energy (CEG)
One-line summary: Largest US nuclear operator; signed Microsoft Three Mile Island PPA (>2x spot, 20-year) and multiple hyperscaler agreements — but faces a material new risk: PJM interconnection delay that could push the Crane Clean Energy Center (TMI Unit 1) from 2027 to 2031.
What it is
Constellation Energy Group (Nasdaq: CEG) is the largest nuclear power operator in the United States, operating 21 nuclear power plants. Following the $21.8B acquisition of Calpine Corp (completed 2026), Constellation also operates significant gas and renewable generation. Headquartered in Baltimore, MD.
Why it matters to stock-market
CEG is the primary listed operator play in nuclear-baseload-for-ai-data-centers. Microsoft's Three Mile Island Unit 1 PPA (835 MW, 20-year, reportedly >2x spot rate) established that hyperscalers will pay a major reliability premium for nuclear. Subsequent hyperscaler PPAs (Meta, others) follow the CEG pattern.
Key facts
Q1 2026 earnings (reported May 11, 2026):
- Revenue: $11.12B (+64% YoY — Calpine acquisition consolidation)
- Adjusted EPS: $2.74 (beat $2.59 consensus)
- Full-year 2026 adjusted EPS guidance midpoint: $11.50 vs. $11.60 consensus → single-day -8% sell-off
- Stock: -11.6% since Q1 earnings; -13% YTD as of late May 2026
- Concern: Calpine integration risk, share dilution, "gas acquirer with nuclear assets" re-rate
Nuclear capacity and PPAs:
- Crane Clean Energy Center (Three Mile Island Unit 1): 835 MW restart; 20-year PPA with Microsoft (reportedly >2x spot). New risk: PJM interconnection delay — potential slip from 2027 to 2031 per Q1 2026 commentary. $1.6B restart investment. See nuclear-baseload-for-ai-data-centers contradictions section.
- Illinois reactors (Braidwood, Byron): Meta 20-year agreement to keep Illinois reactors operating; CEG secured 1 GW of planned nuclear uprates over next decade (announced April 21, 2026, includes 135 MW at Braidwood/Byron).
- 9.8 GW cumulative hyperscaler nuclear commitments across 13 projects (as of May 2026).
Calpine acquisition:
- $21.8B deal adds 23 GW of gas/renewable capacity + retail energy platform
- Integration risk = primary overhang; market re-rating CEG from "nuclear pure-play" to "gas acquirer with nuclear assets"
Stock: ~$11.50 EPS guidance midpoint; -13% YTD as of May 2026. Specific stock price not available (WebFetch 403).
Related
- nuclear-baseload-for-ai-data-centers
- ai-capex-to-power-and-materials-cascade
- nextera-dominion-merger-ai-power-consolidation — NextEra/Dominion merger creates a competing AI DC power play in Dominion's territory