Petróleo Brasileiro S.A. - Petrobras explores, produces, and sells oil and gas in Brazil and internationally. The company operates through three segments: Exploration and Production; Refining, Transportation and Marketing; and Gas and Power. The Exploration and Production segment explores, develops, and produces crude oil, natural gas liquids, and natural gas primarily for supplies to the domestic refineries. The Refining, Transportation and Marketing segment engages in the refining, logistics, transport, acquisition, and exports of crude oil; and production of fertilizers, as well as holding interests in petrochemical companies. The Gas and Power segment is involved in the logistic and trading of natural gas and electricity; transportation and trading of LNG; generation of electricity through thermoelectric power plants; renewable energy businesses; low carbon services; and natural gas processing business, as well as production of biodiesel and its co-products. The company also engages in prospecting, drilling, refining, processing, trading, and transporting crude oil from producing onshore and offshore oil fields, and shale or other rocks, as well as oil products, natural gas, and other liquid hydrocarbons. In addition, it engages in research, development, production, transport, distribution, and trading of energy. Petróleo Brasileiro S.A. - Petrobras was incorporated in 1953 and is headquartered in Rio de Janeiro, Brazil.

FirstEnergy Corp., through its subsidiaries, generates, transmits, and distributes electricity in the United States. It operates through Regulated Distribution and Regulated Transmission segments. The company owns and operates coal-fired, nuclear, hydroelectric, wind, and solar power generating facilities. It operates 24,080 circuit miles of overhead and underground transmission lines; and electric distribution systems, including 274,518 miles of overhead pole line and underground conduit carrying primary, secondary, and street lighting circuits. The company serves approximately 6 million customers in Ohio, Pennsylvania, West Virginia, Maryland, New Jersey, and New York. FirstEnergy Corp. was incorporated in 1996 and is headquartered in Akron, Ohio.

Korea Electric Power Corporation, an integrated electric utility company, engages in the generation, transmission, and distribution of electricity in South Korea and internationally. The company operates through Transmission and Distribution, Nuclear Power Generation, Thermal Power Generation, and Others segments. It generates power from nuclear, coal, oil, liquefied natural gas, internal combustion, combined-cycle, integrated gasification combined cycle, hydro, wind, solar, fuel cell, biogas, and other sources. As of December 31, 2023, the company had a total of 794 generation units, including nuclear, thermal, hydroelectric, and internal combustion units with an installed generation capacity of 83,235 megawatts; transmission system consisted of 35,596 circuit kilometers of lines of 765 kilovolts and others, including high-voltage direct current lines, as well as 900 substations with an installed transformer capacity of 353,166 megavolt-amperes; and distribution system included 143,349 megavolt-amperes of transformer capacity and 10,178,243 units of support with a total line length of 542,567 circuit kilometers. The company provides electricity to residential, commercial, educational, industrial, agricultural, street lighting, and overnight power usage. It also provides engineering and construction services for utility plant and others; utility plant maintenance, electric power information technology, resources development, facility maintenance, electric meter reading, and security services; and engages in nuclear fuel, fly ashes recycling, utility plants construction and operation, and wood pellet utilization businesses. Korea Electric Power Corporation was founded in 1898 and is headquartered in Naju-si, South Korea.

Brookfield Infrastructure Corporation, together with its subsidiaries, owns and operates regulated natural gas transmission systems in Brazil. The company also engages in the regulated gas and electricity distribution operations in the United Kingdom; and electricity transmission and distribution, as well as gas distribution in Australia. It operates approximately 2,000 kilometers of natural gas transportation pipelines in the states of Rio de Janeiro, Sao Paulo, and Minas Gerais; 4.3 million gas and electricity connections; and a global fleet of approximately 7 million twenty-foot equivalent units (TEUs) intermodal containers under long-term contracts. The company was incorporated in 2019 and is headquartered in New York, New York. Brookfield Infrastructure Corporation operates as a subsidiary of Brookfield Infrastructure Partners L.P.

Companhia Energética de Minas Gerais - CEMIG, through its subsidiaries, engages in the generation, transmission, distribution, and sale of energy in Brazil. As of December 31, 2023, the company operated 57 hydro plants with a total capacity of 5,010.4 MW, 9 wind farms with a total capacity of 175.7 MW, and 2 photovoltaic power stations with a total capacity of 3.9 MW; 344,006 miles of distribution lines; and 4,653 miles of transmission lines. It is also involved in the acquisition, transportation, and distribution of gas and its sub products and derivatives; sale and trading of energy; construction, implementation, operation and maintenance of electricity transmission; marketing and intermediation of energy-related business; and distributed generation, account services, cogeneration, energy efficiency, and supply and storage management activities. The company was incorporated in 1952 and is headquartered in Belo Horizonte, Brazil.

Companhia Paranaense de Energia - COPEL engages in the generation, transformation, distribution, and sale of electricity to industrial, residential, commercial, rural, and other customers in Brazil. The company operates through Power Generation and Transmission, Power Distribution, GAS, Power Sale, and Holding and Services segments. It is also involved in the piped natural gas distribution. The company operates hydroelectric, wind, and thermoelectric plants; and owns and operates transmission and distribution lines. It holds concessions to distribute electricity in municipalities in the State of Paraná and in the municipality of Porto União in the State of Santa Catarina. Companhia Paranaense de Energia – COPEL was founded in 1954 and is headquartered in Curitiba, Brazil.

Companhia Paranaense de Energia - COPEL engages in the generation, transformation, distribution, and sale of electricity to industrial, residential, commercial, rural, and other customers in Brazil. The company operates through Power Generation and Transmission, Power Distribution, GAS, Power Sale, and Holding and Services segments. It is also involved in the piped natural gas distribution. The company operates hydroelectric, wind, and thermoelectric plants; and owns and operates transmission and distribution lines. It holds concessions to distribute electricity in municipalities in the State of Paraná and in the municipality of Porto União in the State of Santa Catarina. Companhia Paranaense de Energia – COPEL was founded in 1954 and is headquartered in Curitiba, Brazil.

Central Puerto S.A. engages in the electric power generation in Argentina. It operates in four segments: Electric Power Generation from Conventional Sources, Electric Power Generation from Renewable Sources, Natural Gas Transport and Distribution, and Forest Activity. The company generates energy through combined cycle, gas and steam turbines, co-generation, hydroelectric, wind turbines, and solar panels. It also engages in the natural gas transport and distribution; forestry; and mining businesses. Central Puerto S.A. was incorporated in 1992 and is based in Buenos Aires, Argentina.