Natural Gas Services Group, Inc. provides natural gas compression services and equipment to the energy industry in the United States. It fabricates, manufactures, rents, and sells natural gas compressors and related equipment.

Enerflex Ltd. supplies natural gas compression, oil and gas processing, refrigeration systems, energy transition solutions, and electric power generation equipment to the oil and natural gas industry.

NOW Inc. distributes downstream energy and industrial products for petroleum refining, chemical processing, LNG terminals, power generation utilities, and industrial manufacturing operations in the United States, Canada, and internationally.

Bristow Group Inc. provides aviation services to integrated, national, and independent offshore energy companies in the United States. It also offers commercial search and rescue services; and other helicopter and fixed wing transportation services.

Helix Energy Solutions Group, Inc., an offshore energy services company, provides specialty services to the offshore energy industry primarily in Brazil, the Gulf of Mexico, North Sea, the Asia Pacific, and West Africa regions.

Oceaneering International, Inc. provides engineered services, products, and robotic solutions to the offshore energy, defense, aerospace, manufacturing, and entertainment industries worldwide.

RPC, Inc., through its subsidiaries, provides a range of oilfield services and equipment for the oil and gas companies involved in the exploration, production, and development of oil and gas properties.

Geospace Technologies Corporation designs and manufactures instruments and equipment used in the oil and gas industry to acquire seismic data in order to locate, characterize, and monitor hydrocarbon producing reservoirs.

Oil States International, Inc., through its subsidiaries, provides oilfield products and services for the drilling, completion, subsea, production, and infrastructure sectors of the oil and gas industry worldwide.

MRC Global Inc., through its subsidiaries, distributes pipes, valves, fittings, and other infrastructure products and services to the energy, industrial, and gas utility end-markets in the United States, Canada, and internationally.

North American Construction Group Ltd. provides equipment maintenance, and mining and heavy construction services in Canada, the United States, and Australia.