The nation’s leader in reliable, carbon-free energy is working to create a cleaner, more sustainable future for every American.


As the nation’s No. 1 producer of clean, carbon-free energy, Constellation is a company purpose-built to meet the challenges of the climate crisis. Constellation has been the leader in clean energy production for more than a decade. Now, we’re accelerating, speeding our low-carbon or no-carbon power to more people in more places, day and night, providing our customers and communities with options to buy, manage and use energy as part of their decarbonization mission. The race is on to confront the climate crisis and Constellation is ready to meet the challenge.

  • Constellation generates 50% more clean, carbon-free electricity than any other company in America.
  • We’re generating power 24/7 with the nation’s largest emission-free nuclear energy fleet, providing enough clean, reliable energy to power 16 million homes
  • We generate around 10% of all clean, emission-free electricity in the country
  • Nearly 90% of the energy we produce is carbon-free
  • Constellation offers customers a range of clean, zero-carbon energy solutions to help reduce their carbon footprint and achieve their sustainability goals  

Constellation has set an industry-leading 100/100/100 climate pledge:




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Our 2023 Sustainability Report addresses our approach and progress on key environmental, social, and governance (ESG) topics across each of our operations.

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Constellation is the nation’s largest producer of carbon-free energy with Clean Energy Centers across the United States.

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(1) Any emissions that cannot be technologically reduced by that time will be offset.

Note: "Carbon-free” is defined as the percent of MWh that are produced using non-emitting technology in relation to the total MWh that we produce.

About Us

Constellation Energy Corporation (Nasdaq: CEG) is the nation’s largest producer of clean, carbon-free energy and a leading supplier of energy products and services to millions of homes, institutional customers, the public sector, community aggregations and businesses, including three fourths of Fortune 100 companies. Headquartered in Baltimore, our fleet of nuclear, hydro, wind and solar facilities has the generating capacity to power the equivalent of 15 million homes, providing around 10 percent of the nation’s carbon-free electricity. Our fleet is helping to accelerate the nation’s transition to clean energy with more than 32,400 megawatts of capacity and annual output that is nearly 90 percent carbon-free. 

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