Atlantica Sustainable Infrastructure plc owns, manages, and invests in renewable energy, storage, natural gas and heat, electric transmission lines, and water assets in North America, South America, Europe, the Middle East, and Africa. The company was formerly known as Atlantica Yield plc and changed its name to Atlantica Sustainable Infrastructure plc in May 2020. Atlantica Sustainable Infrastructure plc was incorporated in 2013 and is based in Brentford, the United Kingdom.

Clearway Energy, Inc. operates in the renewable energy business in the United States. The company operates through Conventional and Renewables segments. It has approximately 6,000 net MW of installed wind, solar, and energy generation projects; and approximately 2,500 net MW of natural gas-fired generation facilities. The company was formerly known as NRG Yield, Inc. and changed its name to Clearway Energy, Inc. in August 2018. Clearway Energy, Inc. was incorporated in 2012 and is based in Princeton, New Jersey. Clearway Energy, Inc. operates as a subsidiary of Clearway Energy Group LLC.

Hawaiian Electric Industries, Inc., together with its subsidiaries, engages in the electric utility businesses in the United States. It operates in three segments: Electric Utility, Bank, and Other. The Electric Utility segment engages in the production, purchase, transmission, distribution, and sale of electricity in the islands of Oahu, Hawaii, Maui, Lanai, and Molokai. Its renewable energy sources and potential sources include wind, solar, photovoltaic, geothermal, wave, hydroelectric, municipal waste, and other biofuels. This segment serves suburban communities, resorts, the United States Armed Forces installations, and agricultural operations. The Bank segment operates a federally chartered savings bank that offers banking and other financial services to consumers and businesses, including savings and checking accounts; and loans comprising residential and commercial real estate, residential mortgage, construction and development, multifamily residential and commercial real estate, consumer, and commercial loans. The Other segment invests in non-regulated renewable energy and sustainable infrastructure in the State of Hawaii. Hawaiian Electric Industries, Inc. was founded in 1891 and is headquartered in Honolulu, Hawaii.

Ameresco, Inc., a clean technology integrator, provides a portfolio of energy efficiency and renewable energy supply solutions in the United States, Canada, Europe, and internationally. It operates through U.S. Regions, U.S. Federal, Canada, Europe, Alternative Fuels, and All Other segments. The company offers energy efficiency, infrastructure upgrades, energy security and resilience, asset sustainability, and renewable energy solutions for businesses and organizations. It designs, develops, engineers, and installs projects that reduce the energy, as well as operations and maintenance (O&M) costs of its customers' facilities; and projects primarily include various measures customized for the facility and designed to enhance the efficiency of building systems, such as heating, ventilation, cooling, and lighting systems. In addition, the company offers renewable energy solutions and services, such as the construction of small-scale plants that the company owns or develops for customers that produce electricity, gas, heat, or cooling from renewable sources of energy and O&M services; and electricity, processed renewable gas fuel, and heat or cooling produced from renewable sources of energy. Further, the company sells photovoltaic (PV) solar energy products and systems, as well as provides consulting, and enterprise energy management services; and operates wind farms. It serves the federal, state, local governments, healthcare and educational institutions, airports, public housing authorities and public universities, municipal utilities, and commercial and industrial customers. As of December 31, 2023, the company owned and operated 185 small-scale renewable energy plants and solar PV installations. Ameresco, Inc. was incorporated in 2000 and is headquartered in Framingham, Massachusetts.

Clean Energy Technologies, Inc. designs, produces, and markets clean energy products and integrated solutions that focuses on energy efficiency and renewable energy in the United States. It operates through four segments: Clean Energy HRS and CETY Europe, CETY Renewables Waste to Energy Solutions, engineering and Manufacturing Business, and CETY HK. The company offers Clean Cycle, which generates electricity by recycling wasted heat produced in manufacturing, waste to energy, and power generation facilities. It also converts waste products created in manufacturing, agriculture, wastewater treatment plants, and other industries to electricity, renewable natural gas, hydrogen, and bio char. In addition, the company offers engineering, consulting, and project management solutions. Further, the company is involved in the sourcing and suppling of liquefied natural gas to industries and municipalities located in the southern part of Sichuan Province and portions of Yunnan Province. The company was formerly known as Probe Manufacturing, Inc. and changed its name to Clean Energy Technologies, Inc. in November 2015. Clean Energy Technologies, Inc. was founded in 1993 and is headquartered in Irvine, California. Clean Energy Technologies, Inc. is a subsidiary of MGW Investment I Ltd.

Ellomay Capital Ltd., together with its subsidiaries, engages in the initiation, development, construction, and production of renewable and clean energy projects in Spain, the United States, Italy, the Netherlands, and Israel. The company owns photovoltaic (PV) plants comprising five PV plants in Spain with an aggregate installed capacity of approximately 35.9 megawatts (MW); and one PV plant with an installed capacity of 300 MW in the municipality of Talaván, Spain. It also operates a dual-fuel operated power plant with an installed capacity of approximately 850 MWp in the vicinity of Ashkelon, Israel; and constructs a 156 MW pumped storage hydro power plant in the Manara Cliff, Israel. In addition, the company operates anaerobic digestion plants with a green gas production capacity of approximately 3 million, 3.8 million, and 9.5 million Nm3 per year in the Netherlands. Further, it constructs and develops PV plants with installed capacity of 14.8 MW and 4.95 MW in Lazio, Italy; and PV projects with an installed capacity of 15.06 MW, 87.2 MW, 54.77 MW, 8 MW, and 18 MW in Italy, as well as with installed capacity of 13.44 MW, 6.96 MW, 6.96 MW, 5.2 MW, 5.2 MW, and 9.7 MW in the Dallas metropolitan area, Texas. The company was formerly known as NUR Macroprinters Ltd. and changed its name to Ellomay Capital Ltd. in April 2008. Ellomay Capital Ltd. was incorporated in 1987 and is headquartered in Tel Aviv, Israel.

iSun, Inc., a solar energy services and infrastructure deployment company, provides design, development, engineering, procurement, installation, storage, and electric vehicle infrastructure services for residential, commercial, industrial, and utility customers in the United States. It provides operation, maintenance, and solar; electrical contracting; and data and communication services. The company was formerly known as The Peck Company Holdings, Inc. and changed its name to iSun, Inc. in January 2021. iSun, Inc. was founded in 1972 and is headquartered in Williston, Vermont.

Via Renewables, Inc., through its subsidiaries, operates as an independent retail energy services company in the United States. It operates through two segments, Retail Electricity and Retail Natural Gas. The Retail Electricity segment engages in the transmission and sale of electricity to residential and commercial customers. The Retail Natural Gas segment is involved in the transportation, distribution, and sale of natural gas to residential and commercial customers. It also provides broker services for retail energy customers; and wireless services and equipment to wireless customers. The company offers its services under the Electricity Maine, Electricity N.H., Major Energy, Provider Power Massachusetts, Spark Energy, and Verde Energy brand names. It operates in 104 utility service territories across 20 states and the District of Columbia; and has approximately 335,000 residential customer equivalents. The company was formerly known as Spark Energy, Inc. and changed its name to Via Renewables, Inc. in August 2021. Via Renewables, Inc. was founded in 1999 and is headquartered in Houston, Texas. As of June 13, 2024 Via Renewables, Inc operates as a subsidiary of NuRetailco LLC.