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.

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.

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.

Liberty Energy Inc. provides hydraulic fracturing and wireline services, and related goods to onshore oil and natural gas exploration and production companies in North America.

Ranger Energy Services, Inc. provides onshore high specification well service rigs, wireline completion services, and complementary services to exploration and production companies in the United States.

ProPetro Holding Corp., an oilfield services company, provides hydraulic fracturing and other related services. The company operates through Pressure Pumping and All Other segments.

Nine Energy Service, Inc. operates as an onshore completion services provider that targets unconventional oil and gas resource development across North American basins and internationally.

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.