JSC MMZ (a.k.a. Mariyskiy Machine-Building Plant) is a Russian military-industrial state enterprise that develops control systems for air defence, including the S-300V anti-aircraft missile system, deployed by the Russian Armed Forces. Moreover, JSC MMZ is part of the Joint Stock Company Almaz-Antey air and space defence corporation, a Russian state-owned arms manufacturer that develops anti-aircraft defence and cruise missile systems for the Russian military.
Therefore, JSC MMZ is supporting materially and benefitting from the Government of the Russian Federation, which is responsible for the annexation of Crimea and the destabilisation of Ukraine. Furthermore, JSC MMZ is associated with the Joint Stock Company Almaz-Antey air and space defence corporation.