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American Electric Technologies, Inc. supplies power delivery solutions in the United States and internationally. It provides power distribution, power conversion, and automation and control systems that distribute and control the flow of electricity from the source to the mechanical device. The company's power distribution products include low and medium voltage switchgears, medium voltage arc-resistant switchgears, low and medium voltage motor control centers, bus ducts, fuse and switch products, and other related power distribution equipment; and power conversion solutions comprise alternating current variable frequency drive systems, analog systems, and digital silicon controlled rectifier (SCR) products. It also provides automation and control solutions for the management and control of power in a customer's application; power distribution centers that are used to house power distribution and conversion products; variable frequency drive and SCR houses for land drilling; and driller's cabins for land and offshore deployment. In addition, the company offers electrical power infrastructure commissioning and maintenance services; electrical and instrumentation construction, and installation services, including electrical and instrumentation turnarounds, maintenance, renovation, and new construction projects; and low and medium voltage start-up/commissioning, preventative maintenance, emergency call out, and breaker and switchgear refurbishment services. It serves the oil and gas, power generation and distribution, and marine and industrial markets. The company was founded in 1946 and is headquartered in Houston, Texas.

Ampco-Pittsburgh Corporation, together with its subsidiaries, engages in manufacture and sale of specialty metal products and customized equipment to commercial and industrial users worldwide. The company operates through Forged and Cast Engineered Products (FCEG); and Air and Liquid Processing (ALP) segments. The FCEG segment produces forged hardened steel rolls, cast rolls and, forged engineered products that are used in cold rolling mills by producers of steel, aluminum, and other metals; cast rolls for hot strip mills, medium/heavy section mills, roughing mills, and plate mills; and forged engineered products for narrow and wide strip and aluminum mills, back-up rolls for narrow strip mills, and leveling rolls and shafts. The ALP segment produces custom-engineered finned tube heat exchange coils and related heat transfer products for various industries, including OEM/commercial, nuclear power generation, and industrial manufacturing; custom-designed air handling systems for institutional, pharmaceutical, and general industrial building markets; and manufacture centrifugal pumps for the fossil fueled power generation, marine defense, and industrial refrigeration industries. Ampco-Pittsburgh Corporation was incorporated in 1929 and is headquartered in Carnegie, Pennsylvania.

The LGL Group, Inc., together with its subsidiaries, engages in the design, manufacture, and marketing of frequency and spectrum control products in the United States and internationally. The company offers NTP Servers, broadband amplifiers, RF distribution, 1PPS distribution, and fiber optic distribution. It also offers time and frequency instrumentation, including frequency standards, time standards, and time code generators. In, addition it offers wide range of ancillary products, such as RF distribution amplifiers, digital distribution amplifiers, time code distribution amplifiers, and redundancy switches. Its products are used in computer networking, satellite ground stations, electric utilities, metrology, broadcasting, and telecommunication systems. The company was formerly known as Lynch Corporation and changed its name to The LGL Group, Inc. The LGL Group, Inc. was founded in 1917 and is based in Orlando, Florida.

Perma-Fix Environmental Services, Inc., through its subsidiaries, operates as an environmental and technology know-how company in the United States. The company through Treatment and Services segments. The Treatment segment offers nuclear, low-level radioactive, mixed waste, hazardous and non-hazardous waste treatment, and processing and disposal services through treatment and storage facilities. This segment is also involved in the research and development activities to identify, develop, and implement waste processing techniques for problematic waste streams. The Services segment provides technical services, including professional radiological measurement and site survey of government and commercial installations; health physics services; integrated occupational safety and health services; and consulting, engineering, project and waste management, environmental, decontamination and decommissioning (D&D) field, technical and management personnel and services; and waste management services. This segment also offers nuclear services, including D&D of government and commercial facilities, including engineering, technology applications, specialty services, logistics, transportation, processing, and disposal; and license termination support, such as project management, planning, characterization, waste stream identification and delineation, remediation/demolition, compliance demonstration, final status survey, reporting, transportation, disposal and emergency response. In addition, it maintains, services, maintains, calibrates, and sources health physics, IH and customized nuclear, environmental, and occupational safety and health instruments. The company provides its services to research institutions, commercial companies, public utilities, and governmental agencies through direct sales to customers or through intermediaries. Perma-Fix Environmental Services, Inc. was incorporated in 1990 and is headquartered in Atlanta, Georgia.

Vertex Energy, Inc., an energy transition company, that focuses on the production and distribution of conventional and alternative fuels. The company engages in refining and distributing petroleum products comprising the mobile refinery and related operations. It sells ferrous and non-ferrous recyclable metal products, and markets Group III base oils and other petroleum-based products, as well as provides transportation and marine salvage services. Vertex Energy, Inc. was founded in 2001 and is headquartered in Houston, Texas.