Energia (corporation)

S.P. Korolev Rocket and Space Corporation "Energia" (Russian: Ракетно-космическая корпорация «Энергия» им. С. П. Королёва, romanized: Raketno-kosmicheskaya korporatsiya «Energiya» imeni S. P. Korolyova), commonly known as RSC Energia, is a Russian aerospace manufacturer and spacecraft design bureau. Headquartered in Korolyov, Moscow Oblast, the company is the principal contractor for Russia's human spaceflight program, producing crewed and cargo spacecraft, space station modules, and satellite platforms.

Founded in 1946 as OKB-1 under Sergei Korolev, the group was responsible for pioneering achievements in the Soviet and Russian space programs, including the launch of the first artificial satellite Sputnik 1 and the first human spaceflight, Vostok 1. Over subsequent decades it developed the Soyuz spacecraft, the Progress cargo vehicle, the Energia heavy-lift launch system, and modules for the Salyut, Mir, and the International Space Station (ISS).

In the post-Soviet period the company was reorganized as RSC Energia in 1994, continuing its role as the lead contractor for Russia's crewed spaceflight activities. By the 2020s, however, the company faced mounting financial and organizational problems, culminating in 2025 when internal communications revealed severe debt, declining morale, and warnings of possible bankruptcy.