TechnipFMC plc engages in the energy projects, technologies, and systems and services businesses in Europe, Central Asia, North America, Latin America, the Asia Pacific, Africa, the Middle East, and internationally. It operates through two segments: Subsea and Surface Technologies. The Subsea segment engages in the design, engineering, procurement, manufacturing, fabrication, installation, and life of field services for subsea systems, subsea field infrastructure, and subsea pipe systems used in oil and gas production and transportation. It provides subsea production and processing system; flexible pipe; subsea umbilicals, risers, and flowlines; vessels; robotics; well and asset services; and Subsea Studio for optimizing the development, execution, and operation of current and future subsea fields. The Surface Technologies segment designs, manufactures, and services products and systems used in land and shallow water exploration and production of crude oil and natural gas. This segment offers drilling; surface wellheads and production trees systems; iComplete, a pressure control system; fracturing tree and manifold systems; flexible pipes; safety and integrity systems, multiphase meter modules, in-line separation and processing systems, and standard pumps; well control and integrity systems; separation and processing systems; skid systems; and flow measurement and automation solutions. It also offers planning, testing and installation, commissioning, operations, replacement and upgrade, maintenance, storage, preservation, intervention, integrity, decommissioning, and abandonment; and supplies flowline products and services. TechnipFMC plc was founded in 1884 and is headquartered in Houston, Texas.

Enerflex Ltd. offers energy infrastructure and energy transition solutions to natural gas markets in North America, Latin America, and the Eastern Hemisphere. The company provides natural gas compression infrastructure, processing, and treated water infrastructure under contract to oil and natural gas customers; power generation rental solutions; custom and standard compression packages for reciprocating and screw compressor applications; re-engineering, re-configuration, and re-packaging of compressors for various field applications; integrated turnkey power generation, gas compression, processing facilities, natural gas compression, processing, and electric power solutions; after-market mechanical services and parts distribution, as well as maintenance solutions to the oil and natural gas industry, operations, and overhaul services; and equipment supply, parts supply, and general asset management. It also designs, engineers, manufactures, constructs, and installs modular natural gas processing equipment, low-carbon solutions, cryogenic systems, electric power solutions, and treated water solutions; and engages in the engineering, design, procurement, project management, and construction services for compression, process, treated water, and power generation equipment, as well as after-market service, parts, and operations and maintenance services for gas compression, processing, and treated water facilities in the region. The company was formerly known as Enerflex Systems Income Fund and changed its name to Enerflex Ltd. in January 2010. Enerflex Ltd. was founded in 1980 and is headquartered in Calgary, Canada.

ProFrac Holding Corp. operates as a technology-focused energy services holding company in the United States. It operates through three segments: Stimulation Services, Manufacturing, and Proppant Production. The company offers hydraulic fracturing, well stimulation, in-basin frac sand, and other completion services and complementary products and services to upstream oil and natural gas companies engaged in the exploration and production of unconventional oil and natural gas resources. It also manufactures and sells high horsepower pumps, valves, piping, swivels, large-bore manifold systems, and fluid ends. ProFrac Holding Corp. was founded in 2016 and is headquartered in Willow Park, Texas.

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.

Forum Energy Technologies, Inc. designs, manufactures, and distributes products serving the oil, natural gas, industrial, and renewable energy industries in the United States and internationally. It operates through three segments: Drilling & Downhole, Completions, and Production. The Drilling & Downhole segment designs, manufactures, and supplies products, and provides related services to the drilling, well construction, artificial lift, and subsea energy construction and services markets, including applications in oil and natural gas, renewable energy, defense, and communications. This segment offers drilling technologies consisting of capital equipment and a line of products consumed in the drilling process; well construction casing and cementing equipment, and products for artificial lift equipment and cables; and subsea remotely operated vehicles and trenchers, submarine rescue vehicles, specialty components and tools, and technical services. The Completions segment offers hydraulic fracturing pumps, cooling systems, high-pressure flexible hoses, and flow iron for pressure pumping markets; wireline cable and pressure control equipment for well completion and intervention service markets; and coiled tubing strings and coiled line pipe and related services. The Production segment designs, manufactures, and supplies products, and provides related equipment and services for production and infrastructure markets. This segment offers engineered process systems, production equipment, specialty separation equipment, and various industrial valves for oil and natural gas customers, power generation, renewable energy, and other general industrial applications. The company was formerly known as Forum Oilfield Technologies, Inc. and changed its name to Forum Energy Technologies, Inc. in August 2010. Forum Energy Technologies, Inc. was incorporated in 2005 and is headquartered in Houston, Texas.

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.

ClearSign Technologies Corporation designs and develops products and technologies to enhance emission and operational performance, energy efficiency, emission reduction, safety, and overall cost-effectiveness of industrial and commercial systems in the United States, the People's Republic of China, and Hong Kong. The company's technologies include ClearSign core burner technology consists of an industrial burner body and a downstream porous ceramic or metal flame stabilizing structure; ClearSign core process burner technology that provides a direct burner replacement for traditional refinery process heaters; ClearSign core boiler burner technology; ClearSign core flaring burners that can be used individually, or in combination, to provide a flare product with extremely low nitrogen oxide emissions; and ClearSign eye flame sensor, an electrical flame sensor for industrial applications. It serves energy, institutional, commercial and industrial boiler, chemical, and petrochemical industries. The company was formerly known as ClearSign Combustion Corporation and changed its name ClearSign Technologies Corporation in November 2019. ClearSign Technologies Corporation was incorporated in 2008 and is headquartered in Tulsa, Oklahoma.

Camber Energy, Inc. provides custom energy and power solutions to commercial and industrial clients in North America. The company operates through two segments, Power Generation and Oil and Gas Exploration. It manufactures and supplies power generation products, services, and custom energy solutions; clean-tech energy systems, including combined heat and power, tier 4 final diesel, and natural gas industrial engines, solar, wind, and storage; designs and assembles electrical control equipment, such as switch gear, synchronization and paralleling gear, distribution, bi-fuel, and complete power generation production controls; and clean energy and carbon-capture systems to generate clean electricity. The company also engages in developing, patent pending, electric transmission, and distribution of open conductor detection systems to detect a break in a transmission line, distribution line, or coupling failure. In addition, it engages in the exploration and production of properties in central and southern United States. Camber Energy, Inc. is headquartered in Houston, Texas.