OAO RSC Energia is a Russian manufacturer of spacecraft and space station components. The company is the prime developer and contractor of the Russian manned spaceflight program ; it also owns a majority of Sea Launch.
OAO RSC Energia is the successor of OKB-1, TsKBEM and NPO Energia after academician S.P. Korolev.
Its name is derived from Sergei Korolyov, the first chief of its design bureau, and the Russian word for energy. Its name in full is "OAO S.P. Korolyov Rocket and Space Corporation Energia" (Russian: Ракетно-космическая корпорация "Энергия" им. С.П.Королёва Raketno-kosmicheskaya korporatsiya "Energiya" im. S.P.Korolyova), also known as RSC Energia (Ркк Энергия RKK Energiya),