Constellation and Walmart Forge Landmark Nuclear Energy Partnership in Illinois
Constellation and Walmart have entered into a groundbreaking long-term agreement that underscores the growing role of nuclear power in supporting clean energy goals, economic development, and grid reliability across the United States. The two companies announced a new power purchase agreement (PPA) that will provide Walmart with emissions-free electricity generated by Constellation’s Dresden Clean Energy Center in Illinois, marking Walmart’s first-ever nuclear energy procurement arrangement.
The agreement represents a significant milestone for both organizations and highlights the increasing interest among major corporations in securing dependable carbon-free energy sources to meet expanding operational needs. Under the terms of the deal, Walmart will purchase approximately 176 megawatts (MW) of wholesale nuclear energy supply from the Dresden facility, including 30 MW of additional generation capacity that will be created through planned efficiency improvements at the site.
The long-term arrangement will be implemented through two separate 15-year terms beginning in 2029 and 2030. In addition to electricity, Walmart will receive associated environmental attributes and capacity benefits from the facility. The agreement is expected to contribute to the retailer’s sustainability objectives while helping strengthen Illinois’ energy infrastructure and supporting long-term economic growth in the region.
Constellation executives emphasized that the partnership demonstrates the value of investing in existing clean energy assets that can continue providing reliable electricity for decades. The agreement will support planned uprates at the Dresden Clean Energy Center, a process that involves enhancing equipment and operational efficiencies to increase output from existing nuclear reactors. Unlike constructing new generation facilities, uprates enable utilities to expand power production using established infrastructure, making them a cost-effective and efficient method of adding carbon-free electricity to the grid.
Jim McHugh, Senior Executive Vice President and Chief Commercial Officer of Constellation, described the agreement as a commitment to long-term infrastructure stewardship and regional energy security. He noted that Walmart’s support will help drive meaningful investment at the Dresden facility, ensuring continued reliability while maintaining employment opportunities and economic activity in surrounding communities.
According to McHugh, the agreement not only reinforces the importance of dependable nuclear generation but also helps deliver additional emissions-free electricity to Illinois consumers and businesses. By supporting upgrades at Dresden, the partnership contributes to grid stability at a time when electricity demand is increasing due to industrial expansion, electrification initiatives, and the growth of advanced technologies.
The additional power generated through the uprate project is expected to play a role in supporting Walmart’s future operations within Illinois. Specifically, the increased output will help serve the company’s new high-tech perishable distribution center currently being developed in Belvidere. Walmart previously announced plans for the advanced logistics facility as part of a broader modernization strategy designed to strengthen supply chain capabilities and improve efficiency across its grocery and retail operations.
The combination of investments in energy infrastructure and logistics facilities is anticipated to provide substantial economic benefits to local communities. The Belvidere distribution center is expected to create employment opportunities while enhancing regional supply chain networks. Simultaneously, investments in the Dresden nuclear plant will help sustain high-quality jobs associated with nuclear operations and maintenance.
Shayne Wahlmeier, Senior Vice President of Energy for Walmart U.S., highlighted the company’s longstanding commitment to investing in energy solutions that support both business operations and local communities. He stated that the partnership with Constellation aligns with Walmart’s broader strategy of pursuing affordable, reliable, and cleaner energy resources while supporting operational growth.
Wahlmeier emphasized that Walmart continuously evaluates emerging technologies and energy options to ensure access to dependable electricity. As energy demand grows and sustainability expectations evolve, the retailer views partnerships such as this one as an important component of maintaining resilient operations while supporting responsible energy production.
The agreement is particularly notable because it represents one of the first long-term nuclear power purchase agreements between a major retail company and a nuclear energy facility in the United States. While corporate renewable energy procurement has become increasingly common over the past decade, direct agreements involving nuclear generation remain relatively rare.
Industry observers view such arrangements as a sign of growing recognition that nuclear power can play a critical role in achieving decarbonization goals while maintaining around-the-clock reliability. Unlike intermittent renewable resources such as wind and solar, nuclear plants operate continuously and provide stable baseload electricity regardless of weather conditions. This reliability has become increasingly valuable as businesses seek energy solutions capable of supporting large-scale operations and future growth.
The Walmart agreement follows Constellation’s announcement in December 2025 regarding the renewal of operating licenses for the Dresden Clean Energy Center. Regulatory approval allows the facility’s reactors to continue operating through 2049 and 2051, providing long-term certainty for customers and stakeholders.
Located in Illinois, the Dresden Clean Energy Center is one of the state’s most important sources of carbon-free electricity. The facility generates reliable baseload power for the regional grid and supports more than 1,100 family-sustaining jobs. Beyond direct employment, the plant contributes significantly to local tax revenues and economic activity throughout the surrounding area.
For Constellation, the agreement reinforces the value of its extensive nuclear generation portfolio. The company operates one of the largest fleets of carbon-free nuclear facilities in the United States and produces enough electricity to power more than eight million homes. These assets have become increasingly important as utilities, businesses, and policymakers seek solutions that combine reliability, affordability, and emissions reductions.
Both Constellation and Walmart have maintained substantial operations in Illinois for many years. Walmart currently operates approximately 175 stores and club locations throughout the state and employs more than 55,000 associates. Constellation’s extensive energy infrastructure serves millions of customers and supports thousands of jobs across Illinois and neighboring regions.
The new power purchase agreement reflects the shared commitment of both organizations to supporting the communities where they operate while investing in long-term economic and environmental sustainability. By combining clean nuclear generation with strategic business growth initiatives, the partnership demonstrates how private-sector collaboration can help address evolving energy needs while strengthening local economies.
As demand for reliable low-carbon electricity continues to rise nationwide, agreements such as this one may serve as a model for future collaborations between energy providers and large corporate consumers. The Constellation-Walmart partnership highlights the increasingly important role that existing nuclear facilities can play in supporting economic development, grid reliability, and emissions reduction efforts for decades to come.
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