Trane Technologies plc, together with its subsidiaries, designs, manufactures, sells, and services of solutions for heating, ventilation, air conditioning, custom, and custom and transport refrigeration in Ireland and internationally. It offers air conditioners, exchangers, and handlers; airside and terminal devices; air sourced heat pumps, auxiliary power units; chillers; coils and condensers; gensets; dehumidifiers; ductless; furnaces; home automation products; humidifiers; indoor air quality assessments and related products; large and light commercial unitary products; refrigerant reclamation products; thermostats/controls; transport heater products; variable refrigerant flow products; and water source heat pumps. The company also provides building management, telematic, control, energy efficiency and infrastructure program, geothermal, thermal energy, thermostats, rate chambers, package heating and cooling, temporary heating and cooling, and unitary systems; bus, rail, and multi-pipe heating, ventilation, and air conditioning systems; and container, diesel-powered, truck, industrial, rail, self-powered truck, trailer, and vehicle-powered truck refrigeration and air filtration systems, as well as aftermarket and OEM parts and supplies. In addition, it offers energy and facility management, installation and performance contracting, repair and maintenance, and rental services. It markets and sells its products under the Trane and Thermo King brands through sales offices, distributors, and dealers; and through sales and service companies with a supporting chain of distributors. The company was formerly known as Ingersoll-Rand Plc and changed its name to Trane Technologies plc in March 2020. Trane Technologies plc was founded in 1885 and is headquartered in Swords, Ireland.

Plug Power Inc. develops hydrogen and fuel cell product solutions in North America, Europe, Asia, and internationally. The company offers GenDrive, a hydrogen-fueled proton exchange membrane (PEM) fuel cell system that provides power to material handling electric vehicles; GenSure, a stationary fuel cell solution that offers modular PEM fuel cell power to support the backup and grid-support power requirements of the telecommunications, transportation, and utility sectors; ProGen, a fuel cell stack and engine technology used in mobility and stationary fuel cell systems, and as engines in electric delivery vans; GenFuel, a liquid hydrogen fueling delivery, generation, storage, and dispensing system; GenCare, an ongoing Internet of Things-based maintenance and on-site service program for GenDrive fuel cell systems, GenSure fuel cell systems, GenFuel hydrogen storage and dispensing products, and ProGen fuel cell engines; and GenKey, an integrated turn-key solution for transitioning to fuel cell power. It also provides electrolyzers, a hydrogen generator for clean hydrogen production; liquefaction systems that provides liquid hydrogen to customers; cryogenic equipment for the distribution of liquified hydrogen, oxygen, argon, nitrogen and other cryogenic gases, including trailers and mobile storage equipment; and liquid hydrogen, an alternative fuel to fossil-based energy. The company sells its products through a direct product sales force, original equipment manufacturers, and dealer networks. Plug Power Inc. was incorporated in 1997 and is headquartered in Latham, New York.

ADS-TEC Energy PLC engages in the provision of intelligent and decentralized energy storage systems in Europe and North America. Its portfolio of ecosystem platforms provides DC-based ultra-fast chargers for Electric Vehicles (EVs) on power limited grids; and energy storage and management solutions for commercial and industrial, and residential sector coupling applications. The company offers ChargeBox, which contains the battery and power inverters; ChargePost, a semi-mobile ultra-high-power charger; and ChargeTrailer, a mobile high power charging system in the form of a standard truck trailer, that has various integrated inverters, air-conditioners, an energy management unit, and security firewall, as well as a communication unit through mobile radio and DC-charging technology. It also provides PowerBooster, a battery energy system with an integrated inverter, security, and communication unit, that boosts capacity for the charging process; Container-Systems, a custom battery system for large-scale applications as 20- or 40-foot container solutions; and Storage Rack Systems, that offers power and storage capacities, as well as digital services. In addition, the company is developing MyPowerplant platform for residential applications. Its products are used in private homes, public buildings, commercial enterprises, industrial and infrastructure solutions, and self-sufficient energy supply systems. The company was founded in 2008 and is based in Dublin, Ireland.

Genie Energy Ltd., through its subsidiaries, engages in the supply of electricity and natural gas to residential and small business customers in the United States and internationally. It operates in two segments, GRE and Genie Renewables. The company also develops, constructs, and operates solar energy projects for commercial and industrial customers, as well as its own portfolio; provides energy brokerage and advisory services; markets community solar energy solutions; and manufactures and distributes solar panel, as well as engages in solar installation design and project management activities. Genie Energy Ltd. was incorporated in 2011 and is headquartered in Newark, 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.

OPAL Fuels Inc., together with its subsidiaries, engages in the production and distribution of renewable natural gas for use as a vehicle fuel for heavy and medium-duty trucking fleets. It also designs, develops, constructs, operates, and services fueling stations for trucking fleets that use natural gas to displace diesel as transportation fuel. In addition, it offers design, development, and construction services for hydrogen fueling stations. Further, the company engages in the generation and sale of renewable power to utilities. OPAL Fuels Inc. is based in White Plains, New York.

Hyzon Motors Inc. supplies hydrogen fuel cell systems for decarbonization applications in various industries. The company commercializes its proprietary fuel cell technology through assembling and upfitting heavy duty (HD) hydrogen fuel cell electric vehicles (FCEVs). It also focuses primarily on assembling and converting hydrogen-powered FCEVs; and building and fostering a clean hydrogen supply ecosystem with partners and third parties from feedstock through hydrogen production, dispensing, and financing. In addition, the company's technology focuses on designing and manufacturing of MEAs, BPPs, fuel cell stacks, and fuel cell systems for integration into commercial vehicles. Hyzon Motors Inc. was founded in 2020 and is headquartered in Bolingbrook, Illinois.

Alternus Energy Group Plc operates as an international vertically integrated independent power producer. It owns, develops, installs, and operates midsized utility scale solar parks. The company was incorporated in 2019 and is headquartered in Dublin, Ireland.