Constellation Energy Corporation is a Fortune 200 company headquartered in Baltimore and is the largest private-sector power producer in the world. The company is the nation’s largest producer of clean and reliable energy and the largest nuclear energy company in the U. S. With 55 gigawatts of capacity from nuclear, natural gas, oil, geothermal, hydro, wind and solar facilities, its fleet has the generating capacity to power the equivalent of 27 million homes, providing…
Constellation Energy Corporation is a Fortune 200 company headquartered in Baltimore and is the largest private-sector power producer in the world. The company is the nation’s largest producer of clean and reliable energy and the largest nuclear energy company in the U. S. With 55 gigawatts of capacity from nuclear, natural gas, oil, geothermal, hydro, wind and solar facilities, its fleet has the generating capacity to power the equivalent of 27 million homes, providing about 10% of the nation’s clean energy. Constellation Energy Corporation also serves as a leading competitive retail supplier, serving approximately 2.5 million customer accounts nationwide, including 80% of the Fortune 100. The company is committed to investing in innovation and new technologies to drive the transition to a reliable, sustainable and secure energy future.
Constellation Energy Corporation generates revenue primarily through the production and sale of electricity from its diverse generation fleet. The company earns income from wholesale and retail sales of electricity, capacity payments, and ancillary services across multiple regional grids. Revenue is also derived from its competitive retail electric supplier operations, which serve residential, commercial, and industrial customers. Additional revenue streams include the sale of natural gas, renewable energy credits, and energy-related products and services. The company’s revenue is supported by long-term power purchase agreements, market-based sales, and regulated contracts.
The company operates through the following segments: Mid-Atlantic, Midwest, New York, ERCOT, Other Power Regions, and Calpine.
- Mid-Atlantic: This segment operates nuclear, natural gas, and renewable energy facilities in the PJM region, including the Brandon Shores, Perryman, and Riverside generating stations. It provides electricity to wholesale and retail customers across Maryland, Pennsylvania, and New Jersey. The segment benefits from regional demand and participation in PJM capacity and energy markets.
- Midwest: This segment includes nuclear and fossil fuel facilities in the MISO and PJM regions, such as the Byron, Quad Cities, and Zion generating stations. It supplies power to customers in Illinois and surrounding states, leveraging its nuclear fleet for baseload generation. The segment participates in capacity auctions and energy markets to optimize revenue.
- New York: This segment consists of nuclear and fossil fuel plants in New York State, including the James A. FitzPatrick and Nine Mile Point nuclear stations. It delivers electricity to the NYISO market, serving utilities, municipalities, and large industrial users. The segment receives revenue from energy sales, capacity payments, and state-sponsored programs like the Zero-Emission Credit (ZEC) program.
- ERCOT: This segment operates natural gas, wind, and solar facilities in Texas, including the Front Oak Creek Energy Center and other gas-fired peaking units. It provides dispatchable power to the ERCOT grid during periods of high demand and grid stress. The segment earns revenue through energy sales, ancillary services, and participation in ERCOT’s wholesale markets.
- Other Power Regions: This segment encompasses generating facilities in regions outside the company’s primary markets, including New England and the West. It includes hydroelectric, wind, and solar assets, as well as some natural gas units. The segment contributes to the company’s renewable portfolio and provides grid support in diverse geographic areas.
- Calpine: This segment comprises the natural gas, geothermal, battery storage, and solar assets acquired from Calpine Corporation in January 2026. It includes approximately 23 gigawatts of generation capacity and a competitive retail electric supplier platform serving approximately 62 terawatt-hours of load annually. The segment operates facilities such as the Thad Hill Energy Center and supports data center developments through agreements with CyrusOne. It also includes the Pastoria Solar Project and Pastoria Power Bank in California.
Constellation Energy Corporation holds a leading position in the U. S. power generation industry as the largest producer of clean energy and the largest nuclear operator. The company competes with other major utilities and independent power producers such as NextEra Energy, Duke Energy, and Vistra Corp. Its competitive advantages include a diversified generation mix, significant scale following the Calpine acquisition, and a strong presence in key wholesale markets. The company’s nuclear fleet provides low-carbon baseload power, while its natural gas assets offer flexibility and reliability.
Constellation Energy Corporation serves a broad customer base that includes residential households, commercial businesses, and industrial facilities across the United States. The company’s retail operations serve approximately 2.5 million customer accounts, including 80% of the Fortune 100 corporations. Specific customers referenced in the filing include CyrusOne, a data center developer and operator, and Pacific Gas and Electric Company, which has a power purchase agreement for the Pastoria Power Bank. The company also supplies power to utilities, municipalities, and large energy consumers in regional markets such as PJM, MISO, NYISO, ERCOT, and others.