Duke Energy Corporation, together with its subsidiaries, operates as an energy company in the United States. It operates through two segments: Electric Utilities and Infrastructure (EU&I), and Gas Utilities and Infrastructure (GU&I). The EU&I segment generates, transmits, distributes, and sells electricity in the Carolinas, Florida, and the Midwest. It generates electricity through coal, hydroelectric, natural gas, oil, solar and wind sources, renewables, and nuclear fuel. This segment also engages in the wholesale of electricity to municipalities, electric cooperative utilities, and load-serving entities. The GU&I segment distributes natural gas to residential, commercial, industrial, and power generation natural gas customers; and invests in pipeline transmission projects, renewable natural gas projects, and natural gas storage facilities. The company was formerly known as Duke Energy Holding Corp. and changed its name to Duke Energy Corporation in April 2006. Duke Energy Corporation was founded in 1904 and is headquartered in Charlotte, North Carolina.

Constellation Energy Corporation generates and sells electricity in the United States. It operates through five segments: Mid-Atlantic, Midwest, New York, ERCOT, and Other Power Regions. The company sells natural gas, energy-related products, and sustainable solutions. It has approximately 33,094 megawatts of generating capacity consisting of nuclear, wind, solar, natural gas, and hydroelectric assets. It serves distribution utilities; municipalities; cooperatives; and commercial, industrial, governmental, and residential customers. The company was incorporated in 2021 and is headquartered in Baltimore, Maryland.

Cameco Corporation provides uranium for the generation of electricity. It operates through Uranium, Fuel Services, Westinghouse segments. The Uranium segment is involved in the exploration for, mining, and milling, purchase, and sale of uranium concentrate. The Fuel Services segment engages in the refining, conversion, and fabrication of uranium concentrate, as well as the purchase and sale of conversion services. This segment also produces CANDU reactor fuel bundles and other reactor components. The company offers nuclear fuel processing services. The Westinghouse segment engages in the manufacture of nuclear reactor technology original equipment. This segment provides products and services to commercial utilities and government agencies; and outage and maintenance services, engineering support, instrumentation and controls equipment, plant modification, and components and parts to nuclear reactors. It sells its uranium and fuel services to nuclear utilities in the Americas, Europe, and Asia. Cameco Corporation was incorporated in 1987 and is headquartered in Saskatoon, Canada.

BWX Technologies, Inc., together with its subsidiaries, manufactures and sells nuclear components in the United States, Canada, and internationally. It operates through two segments, Government Operations and Commercial Operations. The Government Operations segment designs and manufactures naval nuclear components, reactors, and nuclear fuel; fabrication activities; and supplies proprietary and sole-source valves, manifolds, and fittings to naval and commercial shipping customers. This segment also involved in manufacture of close-tolerance and equipment for nuclear applications; down blend government stockpiles of uranium; receives, stores, characterizes, dissolves, recovers, and purifies uranium-bearing materials; and supplies research reactor fuel elements for colleges, universities, and national laboratories, as well as components for defense applications. The Commercial Operations segment designs and manufactures commercial nuclear steam generators, heat exchangers, pressure vessels, and reactor components; and other auxiliary equipment, including containers for the storage of nuclear fuel and other high-level nuclear waste. This segment also offers nuclear fuel, fuel handling systems, tooling delivery systems, nuclear grade materials, and precisely machined components, and related services for CANDU nuclear power plants; provides in-plant inspection, maintenance, and modification services, as well as non-destructive examination and tooling/repair solutions; and manufactures medical radioisotopes, radiopharmaceuticals, and medical devices. The company was formerly known as The Babcock & Wilcox Company and changed its name to BWX Technologies, Inc. in June 2015. BWX Technologies, Inc. was founded in 1867 and is headquartered in Lynchburg, Virginia.

The AES Corporation, together with its subsidiaries, operates as a diversified power generation and utility company in the United States and internationally. The company owns and/or operates power plants to generate and sell power to customers, such as utilities, industrial users, and other intermediaries; owns and/or operates utilities to generate or purchase, distribute, transmit, and sell electricity to end-user customers in the residential, commercial, industrial, and governmental sectors; and generates and sells electricity on the wholesale market. It uses various fuels and technologies to generate electricity, such as coal, gas, hydro, wind, solar, and biomass, as well as renewables comprising energy storage and landfill gas. The company owns and/or operates a generation portfolio of approximately 34,596 megawatts and distributes power to 2.6 million customers. The company was formerly known as Applied Energy Services, Inc. and changed its name to The AES Corporation in April 2000. The AES Corporation was incorporated in 1981 and is headquartered in Arlington, Virginia.

Fluor Corporation provides engineering, procurement, and construction (EPC); fabrication and modularization; operation and maintenance; asset integrity; and project management services worldwide. The company operates through Energy Solutions, Urban Solutions, Mission Solutions, and Other segments. The Energy Solutions segment provides solutions to the energy transition markets, including asset decarbonization, carbon capture, renewable fuels, waste-to-energy, green chemicals, hydrogen, nuclear power, and other low-carbon energy sources. It also provides consulting services, including feasibility studies, process assessments, and project finance structuring; and a range of services for small modular reactor technologies, conventional and advanced nuclear reactor technologies. This segment serves the production and fuels, chemicals, LNG, power markets, chemicals and petrochemical industries. The Urban Solutions segment offers EPC and project management services to the infrastructure, advanced technologies, life sciences, and mining and metals industries. This segment also provides staffing services to the company and third-party clients with technical, professional, and craft resources on a contract or permanent placement basis. The Mission Solutions segment offers technical solutions to the U.S. and other governments. It also delivers solutions for nuclear security and operation, nuclear waste management, and laboratory management; and operation and maintenance, logistics, EPC, and life support solutions for mission-critical facilities across U.S. military service organizations. This segment offers site management, environmental remediation, and decommissioning for nuclear remediation at governmental facilities, as well as services to commercial nuclear clients. Fluor Corporation was founded in 1912 and is headquartered in Irving, Texas.

Lightbridge Corporation, together with its subsidiaries, engages in developing nuclear fuel technology. It develops and commercializes metallic nuclear fuels. The company was formerly known as Thorium Power, Ltd. and changed its name to Lightbridge Corporation in September 2009. Lightbridge Corporation is headquartered in Reston, Virginia.

FuelCell Energy, Inc., together with its subsidiaries, manufactures and sells stationary fuel cell and electrolysis platforms that decarbonize power and produce hydrogen. The company provides various configurations and applications of its platform, including on-site power, utility grid support, and microgrid, as well as distributed hydrogen; solid oxide-based electrolysis; solutions for long duration hydrogen-based energy storage and electrolysis technology; and carbon capture, separation, and utilization systems. It also offers technology to produce electricity, heat, hydrogen, and water. In addition, the company provides turn-key solutions, including development, engineering, procurement, construction, interconnection, and operation services. It serves various markets, including utilities and independent power producers, industrial and process applications, education and health care, data centers and communication, wastewater treatment, government, commercial and hospitality, microgrids, manufacturing, industrial hydrogen, port, oil and gas, wind and solar projects, food and beverage, hydrogen for mobility and material handling, and hydrogen fuel for heat, as well as engineering, procurement, and construction firms. The company primarily operates in the United States, South Korea, and Europe. FuelCell Energy, Inc. was founded in 1969 and is headquartered in Danbury, Connecticut.