COMPANIES · ENERGY & GRID
Constellation Energy
Operates the largest fleet of nuclear power plants in the United States and sells electricity to large commercial customers.
Operates the largest fleet of nuclear power plants in the United States and sells electricity to large commercial customers.
Its agreement to restart a shuttered nuclear reactor to power Microsoft data centers became the signature example of AI demand reviving retired power generation.
Sells electricity, largely from nuclear, hydro, wind and solar generation, including long-term contracts to large corporate buyers.
United States
Energy and the electrical grid. The companies that generate, distribute and manage the electricity AI infrastructure runs on. AI data centers use enormous amounts of power, so the companies producing and delivering that electricity are just as critical to the AI economy as the chip makers.
Connections (3)
Every connection below is tied to a readable source, date, classification and statement of its limits. A company source establishes what that company stated; it does not necessarily provide independent confirmation.
Dated or announced (2)
Source: 2025-06-03 · reviewed 2026-09-20
Evidence: Primary-source statement · Agreement signed June 2025; deliveries scheduled to begin June 2027
Limits: This is a virtual PPA covering energy attributes/credits rather than confirmed physical delivery to a specific Meta facility; deliveries are scheduled to begin June 2027, so this is not a currently operating physical supply arrangement. Constellation's release states 1,121 MW; a prior version of this record said 1,092 MW -- the discrepancy is not fully reconciled and may reflect a base-capacity-vs-including-uprate distinction (the deal includes a ~30 MW uprate).
Constellation and Meta Sign 20-Year Deal for Clean, Reliable Nuclear Energy in Illinois ↗Source: 2024-09-20 · reviewed 2026-09-17
Evidence: Primary-source statement · Contract announced
Limits: The restart was targeted for 2027-2028 at signing; this is a long-term supply contract, not evidence of power currently flowing.
Constellation to launch Crane Clean Energy Center, restoring carbon-free power to the grid ↗Comparisons (1)
Source: 2026-09-16 · reviewed 2026-09-22
Evidence: Analytical comparison · Reported operating
Limits: Reflects investor commentary comparing the two as investment options, not a claim by either company; does not establish relative market share or financial performance.
Vistra vs. Constellation vs. Talen Energy: Which Nuclear-Heavy Stock Is the Better AI-Power Bet? ↗Inclusion in this database is not an endorsement of a company or its securities. Nothing here is a recommendation to buy or sell anything, and none of it is individualized investment advice. See the disclosures. Data: AI Map v3.22, released .