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Argan, Inc., through its subsidiaries, provides engineering, procurement, construction, commissioning, maintenance, project development, technical, and consulting services to the power generation market. The company operates through Power Industry Services, Industrial Fabrication and Field Services, and Telecommunications Infrastructure Services segments. The Power Industry Services segment offers engineering, procurement, and construction contracting services to the owners of alternative energy facilities, such as biomass plants, wind farms, and solar fields; and design, construction, project management, start-up, and operation services for projects with approximately 16 gigawatts of power-generating capacity. This segment serves independent power project owners, public utilities, power plant equipment suppliers, and other commercial firms. The Industrial Fabrication and Field Services segment provides construction and field services and vessel fabrication services for fertilizer, lithium technology, engineering and construction, forest products, industrial gas, mining, and other companies in southeast region of the United States. The Telecommunications Infrastructure Services segment offers trenchless directional boring and excavation for underground communication and power networks, as well as aerial cabling services; and installs buried cable, high and low voltage electric lines, and private area outdoor lighting systems. It also provides structured cabling, terminations, and connectivity that offers the physical transport for high-speed data, voice, video, and security networks. This segment serves electricity cooperative, state and local government agencies, regional communications service providers, and other commercial customers, as well as contractors, other commercial firms, and federal government facilities in the mid-Atlantic region of the United States. Argan, Inc. was incorporated in 1961 and is headquartered in Rockville, Maryland.

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.

Concrete Pumping Holdings, Inc. provides concrete pumping and waste management services in the United States and the United Kingdom. The company offers concrete pumping services to general contractors and concrete finishing companies in the commercial, infrastructure, and residential sectors under the Brundage-Bone and Capital Pumping brands; and industrial cleanup and containment services primarily to customers in the construction industry under the Eco-Pan brand. It leases and rents concrete pumping equipment, pans, and containers. As of October 31, 2023, the company owned a fleet of approximately 930 boom pumps, 90 placing booms, 20 telebelts, 300 stationary pumps, and 115 waste management trucks. Concrete Pumping Holdings, Inc. was founded in 1983 and is headquartered in Thornton, Colorado.

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. It operates through three segments: Utility and Power Infrastructure; Process and Industrial Facilities; and Storage and Terminal Solutions. The 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 also 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 Process and Industrial Facilities segment engages in the refining and processing of crude oil; fractionating and marketing of natural, gas and natural gas liquids; and offers plant maintenance, turnarounds, engineering, industrial cleaning services, and capital construction services. The 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 and other 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 also manufactures and sells precision engineered specialty tank products, including geodesic domes, aluminum internal floating roofs, floating suction and skimmer systems, roof drain systems, and floating roof seals. Matrix Service Company was founded in 1984 and is headquartered in Tulsa, Oklahoma.

Vallourec S.A., through its subsidiaries, provides tubular solutions for the oil and gas, industry, and energy markets in Europe, North America, South America, Asia, the Middle East, and internationally. It operates through Tubes; Mine & Forests; and Holding Companies & Other segments. The company offers seamless tubes for refineries, petrochemical facilities, and floating liquefied natural gas plants, as well as production, storage, and offloading units; VAM connections; rigid subsea line pipes and onshore rigid line pipes; and carbon steel and steel alloy tubes, hollow bars, and connections. It also provides assistance in lowering tubes, inspecting connections, and supervising assembly; thread tubes inventory management; tube inspection, maintenance, and repair services; on-site services; preparation for drilling operations; well coordination and supply services based on the drilling programs; and integrated solutions for the subsea line pipe market comprising welding, coating, insulation, bending, logistics, project management, and service agreements. In addition, the company offers tubular products for geothermal; carbon capture, utilization, and storage; and hydrogen industries. Further, it provides tubes and hollow bars, as well as circular, square, rectangular, and octagonal sections for the manufacture of cranes, construction machinery, agricultural machinery, and hydraulic cylinders; and infrastructure construction, as well as axle tubes and gearbox applications for the automotive industry. Additionally, the company is involved in the iron ore and charcoal production businesses. It serves oil service, engineering, and construction companies; distributors and industrial equipment manufacturers; and energy companies, and carbon capture and storage specialists, as well as geothermal, green hydrogen, and solar developers. Vallourec S.A. was founded in 1895 and is based in Meudon, France.