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Advent Technologies Holdings, Inc., an advanced materials and technology development company, operates in the fuel cell and hydrogen technology markets in North America, Europe, and Asia. It develops, manufactures, and assembles fuel cell systems and critical components that determine the performance of hydrogen fuel cells and other energy systems. The company offers high-temperature proton exchange membrane (HT-PEM) fuel cells, including membrane electrode assemblies, bipolar plates, and reformers, as well as provides fuel-cell stack assembly and testing services. It serves stationary power, portable power, automotive, aviation, energy storage, and sensor markets. The company is headquartered in Boston, Massachusetts.

Cadiz Inc., together with its subsidiaries, provides water solutions in the United States. The company operates through Land and Water Resources; and Water Filtration Technology segments. It offers water supply, water storage, water conveyance, and water filtration services. In addition, the company is involved in the cultivation of grain crops and alfalfa, as well as provides water filtration solutions for impaired or contaminated groundwater sources. It serves public water systems, government agencies, and other clients. Cadiz Inc. was founded in 1983 and is based in Los Angeles, California.

Companhia Energética de Minas Gerais, through its subsidiaries, engages in the generation, transmission, distribution, and sale of electricity in Brazil. The company generates electricity through renewable energy sources, such as water, wind, sun, and biomass; or non-renewable sources, including fossil and nuclear fuels. As of December 31, 2016, it operated hydroelectric plants, thermoelectric plants, and solar plants with a total installed capacity of approximately 8,000 megawatts in 10 states of Brazil. It is also involved in the telecommunications and energy solutions consulting businesses; exploitation of natural gas; sale and trading of electricity; and acquisition, transport, and distribution of gas and its subproducts and derivatives, as well as provision of technology systems and systems for operational management of public service concessions, including companies operating in electricity, gas, water and sewerage, and other utility companies. The company was founded in 1952 and is headquartered in Belo Horizonte, Brazil.

Companhia Energética de Minas Gerais, through its subsidiaries, engages in the generation, transmission, distribution, and sale of electricity in Brazil. As of December 31, 2017, the company operated 117 hydroelectric, thermoelectric, and wind plants with an installed capacity of 5.7 GW; 38 substations and 4,927 km of transmission lines; and 529,873 km of distribution networks and 17,301 km of distribution lines. It is also involved in the natural gas distribution; sale and trading of electricity; energy and technological solutions businesses; provision of telecommunications and data center service activities; and operation of solar energy plants. The company was founded in 1952 and is headquartered in Belo Horizonte, Brazil.