Key Takeaways:
Walmart's first nuclear power purchase agreement marks one of the largest corporate commitments to atomic energy by a US retailer, securing 176 megawatts of carbon-free electricity from Constellation's Dresden Clean Energy Center in Illinois.
Constellation Energy Corp. and Walmart Inc. entered a long-term nuclear power purchase agreement that will provide emissions-free electricity from the Dresden Clean Energy Center in Morris, Illinois, the companies said Tuesday. The deal includes approximately 176 megawatts of wholesale supply, with 30 megawatts coming from efficiency upgrades known as uprates that increase output from existing nuclear reactors without building new generating units.
"This agreement reflects long-term stewardship of critical infrastructure, the communities it serves, and the energy system that powers American growth," said Jim McHugh, Senior Executive Vice President and Chief Commercial Officer at Constellation.
Walmart will purchase energy, capacity and associated environmental attributes through two separate 15-year contract periods beginning in 2029 and 2030. The additional power from the plant upgrades will support Walmart's previously announced high-tech perishable distribution center under development in Belvidere, Illinois, strengthening the retailer's supply chain operations in the state.
The deal highlights growing corporate appetite for nuclear power as electricity demand rises from data centers, artificial intelligence infrastructure and electrification goals. Walmart's commitment provides Constellation with long-term revenue visibility for the Dresden facility, which remains licensed to operate through 2049 and 2051 following a license renewal in December 2025. The plant supports more than 1,100 jobs and plays a significant role in Illinois' electricity supply.
Corporate Demand for Nuclear Is Accelerating
Walmart joins a growing list of large corporations turning to nuclear energy to meet sustainability targets while securing reliable baseload power. The agreement is believed to be among the first long-term nuclear PPAs between a major US retailer and a nuclear generation facility. Technology companies including Microsoft Corp., Amazon.com Inc. and Alphabet Inc.'s Google have also pursued nuclear power agreements in recent years to power their expanding data center fleets.
Shayne Wahlmeier, SVP Energy at Walmart US, said the agreement "allows us to support new operations in Illinois while advancing our strategy in a way that prioritizes affordable, reliable, and clean energy for our business and the communities we serve."
Nuclear power provides carbon-free electricity around the clock, unlike intermittent sources such as solar and wind. The uprates at Dresden — efficiency improvements that boost reactor output — offer a lower-cost path to additional capacity compared with constructing new nuclear plants, which face long timelines and regulatory hurdles.
Investment Implications
Constellation shares benefit from the long-term contracted revenue stream, which strengthens earnings visibility through the next decade and beyond. The deal validates the nuclear industry's ability to attract corporate offtakers beyond the traditional utility customer base, potentially opening a new demand channel for existing US nuclear plants. For Walmart, the agreement supports its sustainability strategy while securing power for a major distribution center expansion — a dual benefit that may encourage other retailers to pursue similar arrangements.
This article is for informational purposes only and does not constitute investment advice.
