Constellation Energy Corporation

AI data centers have a power requirement that is uniquely suited to nuclear: they run 24 hours a day, 365 days a year, cannot tolerate outages, consume gigawatts of electricity, and operate under corporate sustainability mandates that make coal or gas politically difficult for hyperscalers to sign long-term contracts with. Nuclear capacity factors above 90% — meaning the plant runs at full output 90% of the time — match perfectly with data center demand profiles. When Microsoft, Google, and Amazon began signing nuclear-specific power purchase agreements (PPAs) in 2024-2025, Constellation, as the largest US nuclear operator, was the most logical counterparty.

Constellation's $16.4 billion acquisition of Calpine in early 2026 expanded its fleet to 60 gigawatts of generating capacity, adding natural gas peakers that complement nuclear baseload with dispatchable capacity. The combined entity can offer hyperscalers a full power solution: nuclear for always-on baseload, gas for peak demand response. Management projects the Calpine deal to be 20% accretive to earnings per share by end of 2026 and guided to 20%+ EPS growth annually through 2029.

CEG trades as a hybrid between a utility and a growth stock, which creates both opportunity and risk. Utility stocks are typically valued on dividend yield and earnings stability; Constellation is valued on PPA contract wins, nuclear fleet uptime, and AI demand growth — a fundamentally different framework. When the market rotates into defensive utilities, CEG often underperforms regulated utilities like NextEra because its premium is tied to AI capex growth, not dividend yield. When AI infrastructure optimism runs hot, CEG often outperforms the broader utility sector by 2-3x.

The key catalysts to track: new hyperscaler PPA announcements, nuclear plant uptime reports (unplanned outages create immediate earnings risk), regulatory decisions around nuclear capacity payments, and quarterly EPS guidance updates. CEG and VST frequently trade as a pair — when one announces a new data center power deal, traders often buy both on the thesis that hyperscaler demand is broadening. Comparing the two on valuation (CEG typically trades at a premium given larger nuclear fleet) helps identify which offers better entry.