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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.

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.

China Advanced Construction Materials Group, Inc., through its subsidiaries, produces and sells construction materials for large scale infrastructure, commercial, and residential developments primarily in the People's Republic of China. Its products include ready-mixed concrete blends, controlled low-strength materials, high-strength concrete products with customized fibers, and soil cement and foundation concretes; and compound admixture, lightweight aggregate, thermostat, and C100 high performance concrete products. The company sells its products to construction companies. It serves subcontractors, general contractors, property owners and developers, governmental agencies, and home builders. The company was founded in 2002 and is based in Beijing, China.

Limbach Holdings, Inc. operates as a building systems solution company in the United States. It operates through two segments, General Contractor Relationships and Owner Direct Relationships. The company engages in the construction and renovation projects that involve primarily include mechanical, plumbing, and electrical services. It also provides critical system repair, MEP infrastructure projects, maintenance contracts, building automation upgrades, data driven insights, and program management services. In addition, it offers captive engineering capabilities, estimating and virtual design; and professional engineering, energy analysis, estimation, and detail design and three-dimensional building installation coordination services. The company serves research, acute care, and inpatient hospitals; public and private colleges, universities, research centers; sports arenas; entertainment facilities, and amusement rides and parks; data centers; automotive, energy and general manufacturing plants; and life sciences, including organizations and companies, whose work is centered around research and development focused on living things. Limbach Holdings, Inc. was founded in 1901 and is headquartered in Warrendale, Pennsylvania.

Real Goods Solar, Inc. operates as a residential and small business commercial solar energy engineering, procurement, and construction company in the United States. The company's Residential segment installs solar energy systems for homeowners, including lease financing, as well as small business commercial services in the continental United States. Its Sunetric segment installs solar energy systems for homeowners and business owners in Hawaii. The company's POWERHOUSE segment manufactures and sells solar shingles. The company Real Goods Solar, Inc. offers solar energy services, including design, procurement, permitting, build-out, grid connection, financing referrals, and warranty. The company markets its products and services through an outside sales team, inside sales, e-sales, and customer referral programs, as well as an online direct marketing channel. Real Goods Solar, Inc. was founded in 1978 and is headquartered in Denver, Colorado.