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Capstone Green Energy Corporation develops, manufactures, markets, and services microturbine technology solutions for use in stationary distributed power generation and distribution networks applications worldwide. It offers microturbines, components, and accessories for various applications, including cogeneration combined heat and power (CHP), integrated CHP, and combined cooling, heat, and power, as well as renewable energy, natural resources, and critical power supply. The company's microturbines are also used as battery charging generators for use in hybrid electric vehicles. It also provides various accessories, including rotary gas compressors with digital controls; integrated heat recovery modules for CHP applications; dual mode controllers that allow automatic transition between grid connect and stand-alone modes; batteries with digital controls for stand-alone or dual-mode operations; power servers for multipacked installations; protocol converters for Internet access; packaging options; and miscellaneous parts, such as frames, exhaust ducting, backflow dampers, and installation hardware. In addition, the company offers rental solutions and aftermarket spare parts. Further, it provides energy conversion products including hybrid energy stations, baker hughes, and industrial gas turbines; hydrogen energy solutions, such as hydrogen-based combined heat and power products; and energy storage products comprising microgrid storage systems and lithium-ion battery energy storage systems. The company markets and sells its products primarily through distributors and original equipment manufacturers. The company was formerly known as Capstone Turbine Corporation and changed its name to Capstone Green Energy Corporation in April 2021. Capstone Green Energy Corporation was founded in 1988 and is headquartered in Van Nuys, California. On September 28, 2023, Capstone Green Energy Corporation, along with its affiliates, filed a voluntary petition for reorganization under Chapter 11 in the U.S. Bankruptcy Court for the District of Delaware.

China Yuchai International Limited, through its subsidiaries, manufactures, assembles, and sells diesel and natural gas engines for trucks, buses and passenger vehicles, marine, industrial, and agriculture applications in the People's Republic of China and internationally. It operates through two segments, Yuchai and HLGE. The company provides diesel engines comprising 4- and 6-cylinder diesel engines, high horsepower marine diesel engines, and power generator engines, as well as natural gas engines, diesel power generators, diesel engine parts, and remanufacturing services; and generator sets, as well as plug in hybrid engines, range extenders, power generation powertrains, hybrid powertrains, integrated electric drive axel powertrains, and fuel cell systems. It also engages in the hospitality and property development activities; and provision of maintenance and retrofitting services. It distributes its engines directly to auto original equipment manufacturers, agents, and retailers. The company was founded in 1951 and is based in Singapore.

Power Solutions International, Inc. designs, engineers, manufactures, markets, and sells engines and power systems in the United States, North America, the Pacific Rim, Europe, and internationally. The company offers engine blocks integrated with fuel system parts, as well as completely packaged power systems, that include combinations of front accessory drives, cooling systems, electronic systems, air intake systems, fuel systems, housings, power takeoff systems, exhaust systems, hydraulic systems, enclosures, brackets, hoses, tubes, packaging, telematics, and other assembled componentry. It also designs and manufactures large, custom-engineered integrated electrical power generation systems for standby and prime power applications. In addition, it provides mobile and stationary gensets for emergency standby, rental, prime power, demand response, microgrid, oil and gas, data center, renewable energy resiliency, and combined heat and power; forklifts, wood chippers, stump grinders, sweepers/industrial scrubbers, aerial lift platforms/scissor lifts, irrigation pumps, oil and gas compression, oil lifts, off road utility vehicles, ground support equipment, ice resurfacing equipment, pump jacks, and battery packs; and vocational trucks and vans school buses, transit buses, and terminal and utility tractors. Power Solutions International, Inc. was founded in 1985 and is headquartered in Wood Dale, Illinois.

Unrivaled Brands, Inc. cultivates, produces, distributes, and retails medical and adult use cannabis products in California, Oregon, and Nevada. It also operates medical marijuana retail and adult use dispensaries, cultivation, and production facilities. The company was formerly known as Terra Tech Corp. and changed its name to Unrivaled Brands, Inc. in July 2021. Unrivaled Brands, Inc. was founded in 2010 and is based in Santa Ana, California.

Westport Fuel Systems Inc. engages in the engineering, manufacturing, and supplying alternative fuel systems and components for use in transportation applications in Europe, Asia, North America, South America, and internationally. The company operates through two segments, Original Equipment Manufacturers and Independent Aftermarket. It offers alternative fuel systems and components, such as liquefied petroleum gas (LPG), compressed natural gas (CNG), liquefied natural gas (LNG), renewable natural gas or biomethane, and hydrogen; and pressure regulators, injectors, electronic control units, valves and filters, complete bi-fuel, mono-fuel and dual-fuel LPG and natural gas conversion kits and high-pressure hydrogen components. The company provides Westport's LNG high pressure direct injection 2.0 fuel system and bi-fuel products; offers turnkey solutions covering all process phases, including prototyping, development, calibration, validation, homologation, vehicle conversion and logistic services, as well as systems for diesel-powered vehicles; and supplies hydrogen fuel system components for light, medium, and heavy-duty applications. It offers its products under the AFS, BRC, Emer, GFI, HPDI, Stako, Prins, Zavoli, OMVL, TA Gas Technology, Vialle, and Valtek brands. The company was formerly known as Westport Innovations Inc. and changed its name to Westport Fuel Systems Inc. in June 2016. Westport Fuel Systems Inc. was incorporated in 1995 and is headquartered in Vancouver, Canada.