Aerostar S.A. is an aerospace and defense manufacturing company with headquarters in Bacău, Romania. The company has a history dating back to 1953 and has undergone several name changes over the years. It was once subordinated to the Ministry of Armed Forces and is currently a subsidiary of IAROM, the former National Centre of the Romanian Aeronautical industry (CNIAR). Aerostar provides maintenance, repair and overhaul (MRO) services and has developed a variety of aircraft, including the IAR-93 twin-engine, tactical ground-attack and reconnaissance aircraft. The company has also produced more than 1,800 Yak-52 trainer aircraft and developed its own range of light civil aircraft for aerobatics and sport aviation. Additionally, Aerostar has been involved in several upgrade programs for military aircraft, including both the MiG-21 and MiG-29, in cooperation with companies such as Elbit Systems and Thales Group. The company has engaged in numerous international projects and partnerships with other aerospace companies.