Constellation Energy and Amazon sign 20‑year nuclear power purchase agreement for Calvert Cliffs

Constellation Energy Corp. and Amazon announced a 20‑year power purchase agreement for the Calvert Cliffs nuclear plant in Maryland. The deal provides Amazon with 690 MW of electricity, including a 190 MW uprate, and commits more than $3 billion to plant upgrades and new emissions‑free capacity expected between 2030 and 2032. Constellation said the contract gives revenue certainty to re‑license the plant for another 20 years. The announcement lifted Constellation shares by roughly 2‑4% in after‑hours and pre‑market trading.

The agreement secures a long‑term revenue stream for Constellation, supporting its earnings outlook and the plant’s relicensing. Amazon gains a stable, carbon‑free power source for its data‑center operations in the PJM market, helping it manage energy costs. Analysts note the deal as a company‑specific catalyst that reversed a prior session decline caused by unrelated regulatory news.

  • 1The agreement covers 690 MW of power, including a 190 MW uprate.
  • 2More than $3 billion will be invested in infrastructure upgrades at Calvert Cliffs.
  • 3The new emissions‑free capacity is expected to come online between 2030 and 2032.
  • 4Constellation expects the deal to provide revenue certainty for a 20‑year plant relicensing.
  • 5Constellation shares rose 2.7% in overnight trading after the announcement.
  • 6Constellation shares rose 3.9% in pre‑market trading following the news.

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