Constellation Energy to supply nuclear power to Walmart facility under 15-year deal

Key facts

• Walmart and Constellation Energy have entered into a long-term nuclear power purchase agreement.
• Constellation will supply nuclear power from its Dresden Clean Energy Center in Illinois.
• The agreement covers approximately 176 megawatts of electricity, including 30 megawatts from planned upgrades.
• The contracts are for 15 years, beginning in 2029 and 2030.
• The deal supports efficiency upgrades at the Dresden Clean Energy Center.

Walmart has entered into a long-term nuclear power purchase agreement with Constellation Energy for electricity from Constellation's Dresden Clean Energy Center in Illinois. The agreement, announced on June 23, 2026, will provide approximately 176 megawatts of wholesale supply, including 30 megawatts from planned efficiency upgrades, known as uprates, at the existing nuclear plant. These uprates will increase the plant's output without requiring new generation capacity. Walmart will purchase the energy, environmental attributes, and capacity through two 15-year contracts, with terms beginning in 2029 and 2030. This deal is significant as it is among the first between a major U.S. retailer and a nuclear energy provider, highlighting a growing corporate interest in reliable, baseload clean power that can operate around the clock. The agreement is specifically tied to supporting Walmart's previously announced high-tech perishable distribution center under development in Belvidere, Illinois, and is expected to strengthen local energy infrastructure and support jobs. The Dresden Clean Energy Center, one of Constellation's largest nuclear facilities, has operating licenses extending through 2049 and 2051.