JSC RusHydro (ticker symbol: MICEX-RTS, LSE: HYDR; OTCQX: RSHYY) announces that on September 6, 2012 TheFederal Financial Markets Service of Russia registered additional issue of RusHydro’s common shares placed through a public subscription(state registration number 1-01-55038-Å-040D of August 16, 2011).

The placement of 89 bn shareswith par value of RUR 1 per share at a price of RUR 1.65was underway from August 2011 through August 13, 2012.

As a result, RusHydro placed 27,334,817,715 shares, or 30.71% of the total approved amount. The shares have been paid both non-cash and cash assets. The government of the Russian Federation has acquired shares worth RUR 39,397,711,485.35, having contributed to the charter capital of RusHydro shares of JSC RAO Energy Systems of the East, JSC Kolymaenergo, JSC Ust-Srednekanskaya HPP, JSC KamGEK, JSC Yakutskenergo and shares of a number of other companies, as well as dams of Bratskaya, Ust-Ilimskaya and Irkutskayahydropower plantson Angara river. Also, the Government of the Russian Federation has contributed RUR 4,631,375,697.30 of budget funds tofinancethe construction of Gotsatlinskayahydropower plantas provided by the federal budget of the Russian Federation.

The decision toincrease RusHydro’s charter capital was approvedby the AGM on June 29, 2012. For more detailed information please visit our website: http://www.rushydro.ru/investors/disclosure/securities/shares