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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.

Broadwind, Inc. manufactures and sells structures, equipment, and components for clean tech and other specialized applications primarily in the United States. It operates through three segments: Heavy Fabrications, Gearing, and Industrial Solutions. The Heavy Fabrications segment provides fabrications to various industrial markets. It offers steel towers and adapters primarily to wind turbine manufacturers. Its Gearing segment provides gearing, gearboxes, and precision machined components to a range of customers in diverse markets, including surface and underground mining, wind energy, steel, material handling, infrastructure, onshore and offshore oil and gas fracking and drilling, marine, and other industrial markets. This segment also offers heat treat services for aftermarket and original equipment manufacturer applications. The Industrial Solutions segment provides supply chain solutions for offering instrumentation and controls, valve assemblies, sensor devices, fuel system components, electrical junction boxes and wiring, energy storage services, and electromechanical devices; light fabrication, inventory management, and kitting and assembly services; packaging solutions; and supply chain solutions, light fabrication, inventory management, and kitting and assembly services for combined cycle natural gas turbine market. It sells its products to the energy, mining, and infrastructure sectors through its direct sales force and independent sales agents. The company was formerly known as Broadwind Energy, Inc. and changed its name to Broadwind, Inc. in May 2020. Broadwind, Inc. is headquartered in Cicero, Illinois.

Paul Mueller Company, together with its subsidiaries, provides manufactured equipment and components in the United States, North America, Asia, the Far East, the Netherlands, EU countries, Europe, and internationally. The company operates through four reportable segments: Dairy Farm Equipment, Industrial Equipment, Field Fabrication, and Transportation. The Dairy Farm Equipment segment offers milk cooling and storage equipment and accessories, refrigeration units, and heat recovery equipment for use on dairy farms to independent dealers for resale, and directly to farmers; and services for farmers, as well as milk coolers for rent to farmers. The Industrial Equipment segment sells food, beverage, chemical, and industrial processing equipment; and biopharmaceutical and pure water equipment, as well as stainless steel, alloy processing, storage tanks, and heat transfer products. The Field Fabrication segment sells large, field-fabricated tanks and vessels, such as stainless steel storage tanks for sanitary and industrial process applications. The Transportation segment offers delivery of products to customers; backhauls of materials and components; and contract carriage for third parties. It serves its products in various industries, including animal health, beverage, brewing, chemical, dairy farm, dairy processing, food, heat transfer, HVAC, industrial construction, oil and gas, personal care, pharmaceutical, pure water, tank fabrication, and wine. The company was founded in 1940 and is headquartered in Springfield, Missouri.

QS Energy, Inc. develops and commercializes energy efficiency technologies in the United States and internationally. The company's energy efficiency technologies assist in meeting energy demands, enhancing the economics of oil transport, and reducing greenhouse gas emissions. Its intellectual properties include a portfolio of domestic and international patents, which have been developed in conjunction with and licensed from Temple University of Philadelphia, Pennsylvania. The company's primary technology comprises Applied Oil Technology, a commercial-grade crude oil pipeline transportation flow-assurance product that reduces crude oil viscosity by applying a high intensity electrical field to crude oil while in transit. It serves upstream and midstream energy sectors. The company was formerly known as Save the World Air, Inc. and changed its name to QS Energy, Inc. in August 2015. QS Energy, Inc. was incorporated in 1998 and is based in Tomball, Texas.