JSC United Aircraft Corporation (UAC) (Russian: Объединённая Авиастроительная Корпорация, Obyedinyonnaya Aviastroitelnaya Korporatsiya (OAK)) is a Russian open joint-stock company. With a majority stake belonging to the Russian Government, it consolidates Russian private and state-owned aircraft construction companies and assets engaged in the manufacture, design and sale of military, civilian, transport, and unmanned aircraft. Its headquarters are in Krasnoselsky District, Central Administrative Okrug, Moscow.