OAO RAO UES (OAO Unified Energy System of Russia; Russian: ЕЭС России or Russian: Единая Энергетическая Система) was an electric power holding company in Russia. It controlled about 70% of Russia's installed electric capacity, 96% of its high-voltage grid and over 70% of its transmission lines. In addition to the Russian market, RAO UES exported electricity to Scandinavia and to other members of the CIS. The last head of RAO UES was Anatoly Chubais.