Archrock, Inc., formerly Exterran Holdings, Inc., is a natural gas contract operations services company. The Company also provides natural gas compression services to customers in the oil and natural gas industry throughout the United States and supplies aftermarket services to customers that own compression equipment in the United States. The Company's segments include contract operations and aftermarket services. The contract operations segment primarily provides natural gas compression services to meet specific customer requirements. The aftermarket services segment sells parts and components, and provides operation, maintenance, overhaul and reconfiguration services to customers having compression and oilfield power generation equipment. The Company also has equity interest in Archrock Partners, L.P. (the Partnership), a master limited partnership that provides natural gas contract operations services to customers throughout the United States.