Comfort Systems USA, Inc., together with its subsidiaries, provides mechanical and electrical installation, renovation, maintenance, repair, and replacement services for the mechanical and electrical services industry in the United States. It operates through two segments, Mechanical and Electrical. The company offers heating, ventilation, and air conditioning systems, as well as plumbing, electrical, piping and controls, off-site construction, monitoring, and fire protection. It also engages in the design, engineering, integration, installation, and start-up of mechanical, electrical, and plumbing (MEP) and related systems in new buildings; and renovation, expansion, maintenance, monitoring, repair, and replacement of MEP systems in existing buildings. In addition, the company provides remote monitoring of power usage, temperature, pressure, humidity and air flow for MEP and other building systems. It serves building owners and developers, general contractors, architects, consulting engineers, and property managers in the commercial, industrial, and institutional MEP markets. Comfort Systems USA, Inc. was founded in 1917 and is headquartered in Houston, Texas.

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.

Thermon Group Holdings, Inc. provides engineered industrial process heating solutions for process industries in the United States and Latin America, Canada, Europe, the Middle East, Africa, and the Asia-Pacific. It offers heat tracing products, such as electric heat tracing cables, steam heating solutions, controls, monitoring and software, instrumentation, project services, industrial heating and filtration solutions, temporary electrical power distribution and lighting, and other products and services. The company also provides controls, monitoring, and software systems for the control and management of a heat trace system; environmental heating solutions under the Ruffneck, Norsemen, and Catadyne brands; process heating solutions under the Caloritech brand name; filtration solutions under the 3L Filters brand; rail and transit solutions under the Hellfire, Velocity, ArcticSense, and other brand names; and boilers under the Vapor Power, Precision Boilers, and Caloritech brands. In addition, it offers project services; transportation heating products, including track and switch heaters, accessories, control panels, rail heaters, gas blower accessories, and air curtains; transit heaters; and velocity heat products. Further, the company offers temporary power solutions; heating systems, such as engineered electric heat, explosion proof gas catalytic heaters, heaters for harshest environments, methane abatement, and engineered filtration system; electrically, steam, and fluid heated tubing bundles; and pre-insulated tubing and system accessories tubing bundles. It serves chemical and petrochemical, oil and gas, power generation, rail and transit, commercial, energy transition/decarbonization, mining and mineral processing, maritime/shipbuilding, semiconductors, pharmaceutical and biotechnology, food and beverage, data centers, and renewables industries through a network of sales and service professionals, and distributors. Thermon Group Holdings, Inc. was founded in 1954 and is headquartered in Austin, 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.

Matrix Service Company provides engineering, fabrication, construction, and maintenance services to support critical energy infrastructure and industrial markets in the United States, Canada, and internationally. The company's Storage and Terminal Solutions segment undertakes work related to aboveground crude oil and refined product storage tanks and terminals; engineering, procurement, fabrication, and construction services related to cryogenic, specialty tanks, and terminals for LNG, NGLs, hydrogen, ammonia, propane, butane, liquid nitrogen/liquid oxygen, and liquid petroleum; and provides plant work, truck and rail loading/offloading facilities, and marine structures, as well as storage tank and terminal maintenance and repair. This segment offers engineered specialty tank products, including geodesic domes, aluminum internal floating roofs, floating suction and skimmer systems, roof drain systems, and floating roof seals. Its Utility and Power Infrastructure segment offers power delivery services, including construction of new substations, upgrades of existing substations, transmission and distribution line installations, and upgrades and maintenance, and emergency and storm restoration services. This segment provides engineering, fabrication, and construction services for LNG utility peak shaving facilities; and construction and maintenance services to power generation facilities, including natural gas fired facilities. The company's Process and Industrial Facilities segment offers plant maintenance and turnarounds for refining and processing of crude oil, fractionating, and marketing of natural gas and natural gas liquids; engineering, procurement, fabrication, and construction for refinery upgrades and retrofits for hydrogen processing, production, loading, and distribution facilities; and constructs thermal vacuum test chambers for aerospace and defense, and other industries. The company was founded in 1984 and is headquartered in Tulsa, Oklahoma.

Mistras Group, Inc. provides technology-enabled asset protection solutions in the United States, other Americas, Europe, and the Asia-Pacific. The company offers non-destructive testing services; inline inspection for pipelines; and plant condition management software. It also provides maintenance and light mechanical services, such as corrosion removal, mitigation and prevention, insulation installation and removal, electrical, heat tracing, industrial cleaning, pipefitting, and welding; engineering consulting services primarily for process equipment, technologies, and facilities; and utilizes scaffolding and rope access to access at-height and confined assets. In addition, the company offers certified divers for subsea inspection and maintenance; unmanned aerial, land-based, and subsea systems for inspection applications; online condition-monitoring solutions; quality assurance and quality control solutions for new and existing metal and alloy components, materials, and composites. Further, it builds monitoring systems, as well as provides inspection, maintenance, monitoring and data services; and Web-based solutions. Additionally, the company designs, manufactures, and sells acoustic emission sensors, instruments, and turnkey systems for monitoring and testing materials, pressure components, processes, and structures; and ultrasonic testing equipment. It serves oil and gas, aerospace and defense, fossil and nuclear power, power generation and transmission, civil infrastructure, manufacturing, industrial, public infrastructure, petrochemical, transportation, and other process industries, as well as infrastructure, research, and engineering industries. Mistras Group, Inc. was founded in 1978 and is headquartered in Princeton Junction, New Jersey.

Oil States International, Inc., through its subsidiaries, provides engineered capital equipment and products for the energy, industrial, and military sectors worldwide. The company operates through three segments: Well Site Services, Downhole Technologies, and Offshore/Manufactured Products. The Well Site Services segment offers a range of equipment and services that are used to drill for, establish, and maintain the flow of oil and natural gas from a well throughout its lifecycle. It also provides wireline support, frac stacks, isolation tools, downhole and extended reach activity, well testing and flowback operations, sand control, and land drilling services. The Downhole Technologies segment provides oil and gas perforation systems, and downhole tools in support of completion, intervention, wireline, and well abandonment operations. This segment also designs, manufactures, and markets its consumable engineered products to oilfield service, and exploration and production companies. The Offshore/Manufactured Products segment designs, manufactures, and markets capital equipment utilized on floating production systems, subsea pipeline infrastructure, and offshore drilling rigs and vessels. Its products include flexible bearings, advanced connector systems, high-pressure riser systems, managed pressure drilling systems, deepwater mooring systems, cranes, subsea pipeline products, and blow-out preventer stack integration products. This segment also provides short-cycle products, such as valves, elastomers, and other specialty products that are used in the land-based drilling and completion markets; and other products for use in industrial, military, alternative energy, and other applications. In addition, it offers specialty welding, fabrication, cladding and machining, offshore installation, and inspection and repair services. The company was incorporated in 1995 and is headquartered in Houston, Texas.

Trio-Tech International, together with its subsidiaries, offers manufacturing, testing, and distribution services to the semiconductor industry in the United States, Singapore, Malaysia, Thailand, and China. It operates through four segments: Manufacturing, Testing Services, Distribution, and Real Estate. The company develops and manufactures test equipment used in front-end and back-end manufacturing processes of semiconductors. It also offers equipment, which includes leak detectors, autoclaves, centrifuges, burn-in systems and boards, HAST testers, temperature-controlled chucks, wet benches, and others; and develops team integrated device manufacturers and fabless semiconductor companies in the testing process. In addition, the company provides electrical, environmental, and burn-in testing services to semiconductor manufacturers in testing laboratories, and end users of semiconductors and electronic components; support the asset-light strategy of customers by setting up test facilities; and providing component level, package level and system level testing services. Further, it distributes environmental chambers, mechanical shock and vibration testers, and other semiconductor equipment; components, such as connectors, sockets, cables, LCD displays, and touch screen panels; and invests in and rents real estate properties; as well as offers design consultancy and value-added services. The company serves automotive, avionics, defense, medical, research, and OEM/ODM manufacturers. Trio-Tech International was incorporated in 1958 and is headquartered in Van Nuys, California.