MTU Aero Engines AG, formerly Mtu Aero Engines Holding AG, is a Germany-based manufacturer of military aircraft engines in all thrust and power categories and stationary gas turbines. The Company operates in two segments: Commercial Original Equipment Manufacturing (OEM) And Spare Parts and Commercial Maintenance, Repair and Overhaul. The Commercial Original Equipment Manufacturing (OEM) And Spare Parts segment comprises the commercial and military engine businesses and includes the production, development, and miscellaneous other capacities. The Commercial Maintenance, Repair and Overhaul segment provides commercial maintenance activities. The Company operates through numerous subsidiaries in Europe, the Americas, Asia and Australia.