MTU Aero Engines AG is engaged in the development, manufacture and trade of aviation engine and components. The company is headquartered in Muenchen, Bayern and currently employs 13,211 full-time employees. The company went IPO on 2008-02-25. The firm operates through two segments: the commercial and military engine business (OEM) and the commercial maintenance business (MRO). The commercial and military engine business (OEM) segment covers the development and production of modules, components, and parts for engine programs, including final assembly, as well as maintenance services. The commercial maintenance business (MRO) segment covers all activities relating to the maintenance, repair, and overhaul of commercial engines and associated services. The company operates through numerous subsidiaries in Europe, the Americas, Asia, and Australia.