Five companies have submitted bids for the upgrade of the Bulgarian army's MiG-29 fighter aircraft: MiG Russian Aircraft Corporation, Israel Aircraft Industries, Elbit Systems of Israel, the European Aeronautic Defence and Space Company, and 558th Baranovichi Aircraft Repair Plant of Belarus.
Pet kompanija predalo je ponude za unapređivanje lovaca tipa MiG-29 Bugarske vojske, i to su: Ruska avionska korporacija MiG, Izraelska avio-industrija, Elbit sistemi iz Izraela, Evropska aero-nautička vojna i svemirska kompanija i fabrika za popravku aviona iz Belorusije, 558. Baranovići.