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Aspen Aerogels, Inc. designs, develops, manufactures, and sells aerogel insulation products primarily for use in the energy infrastructure and sustainable insulation materials markets in the United States, Asia, Canada, Europe, and Latin America. It operates in two segments, Energy Industrial and Thermal Barrier. The company offers PyroThin thermal barriers for use in lithium-ion batteries in electric vehicles and energy storage industries; Pyrogel XTE that reduces the risk of corrosion under insulation in energy infrastructure operating systems; and Pyrogel HPS for applications within the power generation market. It also offers Pyrogel XTF to provide protection against fire; Cryogel Z for sub-ambient and cryogenic applications in the energy infrastructure market; Spaceloft Subsea for use in pipe-in-pipe applications in offshore oil production; and Cryogel X201, which is used in designing cold systems, such as refrigerated appliances, cold storage equipment, and aerospace systems. The company was founded in 2001 and is headquartered in Northborough, Massachusetts.

Quanex Building Products Corporation, together with its subsidiaries, provides components for the fenestration industry in the United States, rest of Europe, Canada, Asia, the United Kingdom, and internationally. The company operates through three segments: North American Fenestration, European Fenestration, and North American Cabinet Components. It offers flexible insulating glass spacers, extruded vinyl profiles, window and door screens, and precision-formed metal and wood products, as well as cabinet doors and other components for original equipment manufacturers (OEMs) in the kitchen and bathroom cabinet industry. In addition, the company provides various non-fenestration components and products, including solar panel sealants, trim moldings, vinyl decking, fencing, water retention barriers, and conservatory roof components. It sells its products to OEMs in the building products industry through sales representatives, direct sales force, distributors, and independent sales agents. Quanex Building Products Corporation was founded in 1927 and is based in Houston, Texas.

VSE Corporation operates as a diversified aftermarket products and services company in the United States. The company operates through two segments, Aviation and Fleet. The Aviation segment provides aftermarket parts supply and distribution; maintenance, repair, and overhaul services for components and engine accessories supporting commercial, business, and general aviation operators. This segment serves commercial airlines, regional airlines, cargo transporters, MRO integrators and providers, aviation manufacturers, corporate and private aircraft owners, and fixed-base operators. The Fleet segment offers parts supply, inventory management, e-commerce fulfillment, logistics, supply chain support, and other services to support the commercial aftermarket medium- and heavy-duty truck market. This segment also provides sale of vehicle parts and supply chain services to support client truck fleets, as well as sustainment solutions and managed inventory services to government and commercial truck fleets. VSE Corporation was incorporated in 1959 and is headquartered in Alexandria, Virginia.

Willdan Group, Inc., together with its subsidiaries, provides professional, technical, and consulting services primarily in the United States. It operates in two segments, Energy, and Engineering and Consulting. The Energy segment offers comprehensive audit and surveys, program design and implementation, master planning, demand reduction, grid optimization, benchmarking analyses, design engineering, construction management, performance contracting, installation, alternative financing, measurement and verification services, and software and data analytics, as well as energy consulting and engineering, turnkey facility and infrastructure projects, and customer support services. The Engineering and Consulting segment provides building and safety, city engineering and code enforcement, development plan review and inspection, disaster recovery, geotechnical and earthquake engineering, planning and surveying, contract staff support, program and construction management, structural engineering, transportation and traffic engineering, and water resources services. This segment also offers district administration, financial consulting, and federal compliance services. It serves public and governmental agencies, including cities, counties, redevelopment agencies, water districts, school districts, and universities; investor and municipal owned energy utilities; state and federal agencies; and commercial and industrial firms, as well as various other special districts and agencies. The company was founded in 1964 and is headquartered in Anaheim, California.