Description of Constellation Energy's Business Segments

Constellation Energy Corporation operates a comprehensive suite of products and services in the energy sector, focusing on both merchant energy and nonregulated businesses. The companys operations can be broadly segmented into two primary categories: the merchant energy business and other nonregulated businesses.

Merchant Energy Business

1. Generation Operations:
- Fossil Fuel Generation: Constellation owns and operates natural gas and coal-fired power plants, contributing to a significant portion of its installed generation capacity. These facilities utilize advanced technologies to ensure efficient and environmentally responsible energy production.
- Nuclear Generation: The company holds interests in nuclear power facilities, which provide a substantial and stable source of carbon-free electricity. These facilities benefit from high capacity factors and are integral to meeting the energy demands of the regions they serve.
- Hydroelectric Generation: Constellations hydroelectric plants harness renewable water flow for energy generation, contributing to the companys sustainability initiatives and diversifying its energy portfolio.
- Qualifying Facilities: The company has stakes in a variety of qualifying facilities under the Public Utility Regulatory Policies Act (PURPA) that promote the generation of renewable energy.

2. Marketing and Risk Management:
- Constellation Power Source: This division focuses on wholesale marketing and risk management of energy-related commodities, allowing the company to hedge against energy price fluctuations while leveraging its generation capacity. This operation plays a vital role in dispatching energy from generating assets and managing risks associated with fuel procurement and energy sales.
- Customer-Centric Risk Solutions: The marketing team structures tailored transactions to meet the specific energy and risk management needs of wholesale customers across various geographic regions.

3. Electric and Gas Retail Services:
- Constellation NewEnergy: This retail operation delivers electric and natural gas services to commercial and industrial clients. It provides energy supply options that include fixed-price contracts, variable pricing, and renewable energy solutions.
- Energy Management Services: The retail segment also offers energy management strategies, enabling customers to optimize their energy usage, reduce costs, and minimize environmental impact.

4. Generation and Consulting Services:
- Besides generating energy, Constellation provides consulting services related to energy efficiency, sustainability planning, and regulatory compliance. This includes assisting customers in navigating complex energy markets and developing strategies for renewable energy adoption.

Other Nonregulated Businesses

1. District Energy Systems:
- Constellation designs, constructs, and operates district heating and cooling systems as well as cogeneration facilities that are tailored for commercial, industrial, and municipal clients. These systems utilize production efficiencies to supply thermal energy and improve overall energy efficiency.
- Sustainability Focus: Many district energy projects incorporate renewable energy technologies, further enhancing their environmental benefits.

2. Home Services and Improvements:
- The company provides a variety of home improvement services, which include the installation and maintenance of heating, air conditioning, plumbing, electrical systems, and indoor air quality solutions. This suite of services is aimed at enhancing comfort, efficiency, and safety in residential properties.
- Natural Gas Retail Marketing: In central Maryland, Constellation offers natural gas marketing services to residential customers, providing them with competitive pricing options and energy plans.

Conclusion

Constellation Energy Corporation presents a diverse array of energy products and services, serving both wholesale and retail markets. The company’s robust merchant energy operations provide a reliable backbone of generation capacity, while its nonregulated businesses foster innovation and sustainability across North America. Through continuous investment in technology and customer solutions, Constellation remains a key player in the evolving energy landscape.

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Composition of Constellation Energy Corporation Revenues by Segments


Power and Power-related	54.28 %	of total Revenue
Capacity	3.74 %	of total Revenue
Other	41.98 %	of total Revenue
Total Power revenues	58.02 %	of total Revenue
Total Power revenues Power and Power-related	54.28 %	of total Revenue
Total Power revenues Capacity	3.74 %	of total Revenue
Total Power revenues PJM	31.11 %	of total Revenue
Total Power revenues PJM Power and Power-related	29.94 %	of total Revenue
Total Power revenues PJM Capacity	1.17 %	of total Revenue
Total Power revenues MISO	2.32 %	of total Revenue
Total Power revenues MISO Power and Power-related	2.27 %	of total Revenue
Total Power revenues MISO Capacity	0.05 %	of total Revenue
Total Power revenues ERCOT	4.13 %	of total Revenue
Total Power revenues ERCOT Power and Power-related	3.24 %	of total Revenue
Total Power revenues ERCOT Capacity	0.89 %	of total Revenue
Total Power revenues NYISO	6.82 %	of total Revenue
Total Power revenues NYISO Power and Power-related	6.7 %	of total Revenue
Total Power revenues NYISO Capacity	0.12 %	of total Revenue
Total Power revenues ISO-NE	9.15 %	of total Revenue
Total Power revenues ISO-NE Power and Power-related	9.12 %	of total Revenue
Total Power revenues ISO-NE Capacity	0.04 %	of total Revenue
Total Power revenues West	2.95 %	of total Revenue
Total Power revenues West Power and Power-related	1.51 %	of total Revenue
Total Power revenues West Capacity	1.44 %	of total Revenue
Total Power revenues SERC SPP	0.57 %	of total Revenue
Total Power revenues SERC SPP Power and Power-related	0.53 %	of total Revenue
Total Power revenues SERC SPP Capacity	0.04 %	of total Revenue
Total Power revenues International Power	0.98 %	of total Revenue
Total Power revenues International Power Power and Power-related	0.98 %	of total Revenue
Gas revenues	8.48 %	of total Revenue
Gas revenues Other	8.48 %	of total Revenue
Other revenues	1.3 %	of total Revenue
Other revenues Other	1.3 %	of total Revenue
Mid-Atlantic	16.61 %	of total Revenue
Midwest	15.57 %	of total Revenue
New York	5.12 %	of total Revenue
ERCOT	3.33 %	of total Revenue
Other Power Regions	13.37 %	of total Revenue
Calpine	21.53 %	of total Revenue
Reconciling Items	24.47 %	of total Revenue

Q1 three months ended (Mar 31 2026)
Revenues by Business Segments	Revenues (in millions $)	% (of total Revenues)
Power and Power-related	6,037.00	54.28 %
Capacity	416.00	3.74 %
Other	4,669.00	41.98 %
Total Power revenues	6,453.00	58.02 %
Total Power revenues Power and Power-related	6,037.00	54.28 %
Total Power revenues Capacity	416.00	3.74 %
Total Power revenues PJM	3,460.00	31.11 %
Total Power revenues PJM Power and Power-related	3,330.00	29.94 %
Total Power revenues PJM Capacity	130.00	1.17 %
Total Power revenues MISO	258.00	2.32 %
Total Power revenues MISO Power and Power-related	252.00	2.27 %
Total Power revenues MISO Capacity	6.00	0.05 %
Total Power revenues ERCOT	459.00	4.13 %
Total Power revenues ERCOT Power and Power-related	360.00	3.24 %
Total Power revenues ERCOT Capacity	99.00	0.89 %
Total Power revenues NYISO	758.00	6.82 %
Total Power revenues NYISO Power and Power-related	745.00	6.7 %
Total Power revenues NYISO Capacity	13.00	0.12 %
Total Power revenues ISO-NE	1,018.00	9.15 %
Total Power revenues ISO-NE Power and Power-related	1,014.00	9.12 %
Total Power revenues ISO-NE Capacity	4.00	0.04 %
Total Power revenues West	328.00	2.95 %
Total Power revenues West Power and Power-related	168.00	1.51 %
Total Power revenues West Capacity	160.00	1.44 %
Total Power revenues SERC SPP	63.00	0.57 %
Total Power revenues SERC SPP Power and Power-related	59.00	0.53 %
Total Power revenues SERC SPP Capacity	4.00	0.04 %
Total Power revenues International Power	109.00	0.98 %
Total Power revenues International Power Power and Power-related	109.00	0.98 %
Gas revenues	943.00	8.48 %
Gas revenues Other	943.00	8.48 %
Other revenues	145.00	1.3 %
Other revenues Other	145.00	1.3 %
Mid-Atlantic	1,847.00	16.61 %
Midwest	1,732.00	15.57 %
New York	569.00	5.12 %
ERCOT	370.00	3.33 %
Other Power Regions	1,487.00	13.37 %
Calpine	2,395.00	21.53 %
Reconciling Items	2,722.00	24.47 %
Total	11,122.00	100 %

Q1 three months ended (Mar 31 2026)
Revenue Growth rates by Segment	Y/Y Revenue %	Q/Q Revenue %
Power and Power-related	15.52 %	-
Capacity	3366.67 %	-
Other	201.23 %	-
Total Power revenues	23.2 %	-
Total Power revenues Power and Power-related	15.52 %	-
Total Power revenues Capacity	3366.67 %	-
Total Power revenues PJM	27.86 %	-
Total Power revenues PJM Power and Power-related	23.42 %	-
Total Power revenues PJM Capacity	1525 %	-
Total Power revenues MISO	20.56 %	-
Total Power revenues MISO Power and Power-related	17.76 %	-
Total Power revenues MISO Capacity	-	-
Total Power revenues ERCOT	52.49 %	-
Total Power revenues ERCOT Power and Power-related	19.6 %	-
Total Power revenues ERCOT Capacity	-	-
Total Power revenues NYISO	12.3 %	-
Total Power revenues NYISO Power and Power-related	10.37 %	-
Total Power revenues NYISO Capacity	-	-
Total Power revenues ISO-NE	-8.21 %	-
Total Power revenues ISO-NE Power and Power-related	-8.57 %	-
Total Power revenues ISO-NE Capacity	-	-
Total Power revenues West	123.13 %	-
Total Power revenues West Power and Power-related	15.07 %	-
Total Power revenues West Capacity	15900 %	-
Total Power revenues SERC SPP	65.79 %	-
Total Power revenues SERC SPP Power and Power-related	68.57 %	-
Total Power revenues SERC SPP Capacity	33.33 %	-
Total Power revenues International Power	127.08 %	-
Total Power revenues International Power Power and Power-related	127.08 %	-
Gas revenues	20.59 %	-
Gas revenues Other	20.59 %	-
Other revenues	68.6 %	-
Other revenues Other	68.6 %	-
Mid-Atlantic	10.93 %	-
Midwest	23.36 %	-
New York	1.25 %	-
ERCOT	-7.04 %	-
Other Power Regions	-4.43 %	-
Calpine	-	-
Reconciling Items	126.27 %	-
Total	-	-56.44 %

Q1 three months ended (Mar 31 2026)
Income by Business Segments	Income (in millions $)	% (Profit Margin)
Total	1,603.00	14.41 %

Q1 three months ended (Mar 31 2026)
Income Growth rates by Segment	Y/Y Income %	Q/Q Income %
Total	-	-30.99 %

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