Matrix Service Company (MTRX)
Matrix Service Company provides engineering, fabrication, construction, and maintenance services to support critical energy infrastructure and industrial markets in the United States, Canada, and internationally.
Natural Gas Services Group, Inc. (NGS)
Natural Gas Services Group, Inc. provides natural gas compression services and equipment to the energy industry in the United States.
USA Compression Partners, LP (USAC)
USA Compression Partners, LP provides natural gas compression services.