Enphase Energy, Inc., together with its subsidiaries, designs, develops, manufactures, and sells home energy solutions for the solar photovoltaic industry in the United States and internationally. The company offers semiconductor-based microinverter, which converts energy at the individual solar module level and combines with its proprietary networking and software technologies to provide energy monitoring and control. It also provides microinverter units and related accessories, an IQ gateway; IQ batteries; the cloud-based Enlighten monitoring service; storage solutions; and electric vehicle charging solutions, as well as design, proposal, permitting, and lead generation services. The company sells its solutions to solar distributors; and directly to large installers, original equipment manufacturers, strategic partners, and homeowners, as well as through its legacy product upgrade program or online store. Enphase Energy, Inc. was incorporated in 2006 and is headquartered in Fremont, California.

Watts Water Technologies, Inc., together with its subsidiaries, supplies products and solutions that manage and conserve the flow of fluids and energy into, through, and out of buildings in the commercial, industrial, and residential markets in the Americas, Europe, the Asia-Pacific, the Middle East, and Africa. The company offers residential and commercial flow control and protection products, including backflow preventers, water pressure regulators, temperature and pressure relief valves, thermostatic mixing valves, leak detection and protection products, commercial washroom solutions, and emergency safety products and equipment for plumbing and hot water applications. It also provides heating, ventilation, and air conditioning and gas products comprising commercial boilers; water heaters and heating solutions; hydronic and electric heating systems for under-floor radiant applications; custom heat and hot water solutions; hydronic pump groups for boiler manufacturers and alternative energy control packages; and flexible stainless-steel connectors for natural and liquid propane gas in commercial food service and residential applications. In addition, the company offers drainage and water re-use products, such as drainage products, engineered rainwater harvesting solutions for commercial, industrial, marine, and residential applications; connected roof drain systems; and water quality products that include point-of-use and point-of-entry water filtration, conditioning, and scale prevention systems for commercial, marine, and residential applications. The company sells its products to plumbing, heating, and mechanical wholesale distributors and dealers; original equipment manufacturers; specialty product distributors; and do-it-yourself and retail chains, as well as wholesalers and private label accounts. Watts Water Technologies, Inc. was founded in 1874 and is headquartered in North Andover, Massachusetts.

Ormat Technologies, Inc. engages in the geothermal and recovered energy power business in the United States, Indonesia, Kenya, Turkey, Chile, Guatemala, Guadeloupe, New Zealand, Honduras, and internationally. It operates in three segments: Electricity, Product, and Energy Storage. The Electricity segment develops, builds, owns, and operates geothermal, solar photovoltaic, and recovered energy-based power plants; and sells electricity. The Product segment designs, manufactures, and sells equipment for geothermal and recovered energy-based electricity generation; and provides services relating to the engineering, procurement, construction, operation, and maintenance of geothermal and recovered energy-based power plants. This segment serves contractors; and owners and operators of interstate natural gas pipelines, gas processing plants, and cement plants, as well as companies in other energy-intensive industrial processes. The Energy Storage segment offers battery energy storage systems and related services. Ormat Technologies, Inc. was founded in 1965 and is headquartered in Reno, Nevada.

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.

TETRA Technologies, Inc., together with its subsidiaries, operates as an energy services and solutions company. It operates through two segments, Completion Fluids & Products Division and Water & Flowback Services. The Completion Fluids & Products segment manufactures and markets clear brine fluids, additives, and associated products and services to the oil and gas industry for use in well drilling, completion, and workover operations in the United States, as well as in Latin America, Europe, Asia, the Middle East, and Africa. This segment also markets liquid and dry calcium chloride products; and TETRA PureFlow ultra-pure zinc bromide to battery technology companies. The Water & Flowback Services segment provides water management services for onshore oil and gas operators. This segment also offers frac flowback, production well testing, and other associated services in oil and gas producing regions in the United States, as well as in various basins in Latin America, Africa, Europe, and the Middle East. TETRA Technologies, Inc. was incorporated in 1981 and is headquartered in The Woodlands, Texas.

Hudson Technologies, Inc., through its subsidiary, Hudson Technologies Company, engages in the provision of solutions to recurring problems within the refrigeration industry in the United States. The company engages in the sale of refrigerant and industrial gas; provision of refrigerant management services consisting primarily of reclamation of refrigerants, re-usable cylinder refurbishment, and hydrostatic testing services; and RefrigerantSide services comprising system decontamination and recovery to remove moisture, oils, and other contaminants. It also offers Chiller Chemistry, which integrates several fluid tests of an operating system and the corresponding laboratory results into an engineering report; Fluid Chemistry, an abbreviated version of Chiller Chemistry, which is designed to quickly identify systems that require further examination; SmartEnergy OPS, a web-based real time continuous monitoring system, for measuring, modifying and improving the efficiency of energy systems, including air conditioning and refrigeration systems, in industrial and commercial applications; and ChillSmart, which combines the system optimization with Chiller Chemistry for providing a snapshot of a packaged chiller's operating efficiency and health. In addition, the company participates in the generation of carbon offset projects. It serves commercial, industrial, and governmental customers, as well as refrigerant wholesalers, distributors, contractors, and refrigeration equipment manufacturers. The company was incorporated in 1991 and is headquartered in Woodcliff Lake, New Jersey.

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.

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.