NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION IN OR INTO THE UNITED STATES, AUSTRALIA, CANADA OR JAPAN

JSC RusHydro (ticker symbol: MICEX-RTS, LSE: HYDR; OTCQX: RSHYY) announces prolongation of the date of open subscription to shares of new issue (state registration no. 1-01-55038-Å-040D dated August 16, 2011) through June 29, 2012 (inclusive of this date). The prolongation of subscription is determined by specifics of procedure for receipt of budget funds and property, specified in the issuance documents.

Offers to purchase shares (hereinafter - offers) could be submitted daily from 10:00 to 17:00 Moscow time, other than on Saturdays, Sundays and public holidays at the address: JSC RusHydro, 51, Architect Vlasov Street, Moscow, 117393,  or at the address of the broker JSC IK EVROFINANSY, 10 block 2 Shabolovka Street, Moscow, 119049. In accordance with resolution on the additional issue of securities and prospectus, RusHydro reserves the right to accept or decline received offers at its own discretion.

The Annual General Meeting of shareholders of RusHydro approved an increase of the Company's authorized share capital by issuing 89,000,000,000 additional ordinary shares with a par value of RUR 1 per share on June 30th, 2011 Detail information on the additional share issue is available at http://www.eng.rushydro.ru/investors/disclosure/securities_issue/shares/2011.

For more information:

JSC RusHydro, Investor Relations Department

Tel. +7 (495) 225-3232 ext. 1319, 1394, 1607

ir@rushydro.ru

This announcement does not contain or constitute an offer of, or the solicitation of an offer to buy or subscribe for, securities to any person in the United States, Australia, Canada or Japan or in any jurisdiction to whom or in which such offer or solicitation is unlawful. The securities referred to herein may not be offered or sold in the United States absent registration under the US Securities Act of 1933, as amended (the "Securities Act") or another exemption from, or in a transaction not subject to, the registration requirements of the Securities Act. Subject to certain exceptions, the securities referred to herein may not be offered or sold in Australia, Canada or Japan or to, or for the account or benefit of, any national, resident or citizen of Australia, Canada or Japan.  The offer and sale of the securities referred to herein has not been and will not be registered under the Securities Act or under the applicable securities laws of Australia, Canada or Japan.  There will be no public offer of the securities in the United States.

This announcement does not contain or constitute an invitation, inducement or solicitation to invest. This announcement is directed only at and is for distribution only to persons who (i) are outside the United Kingdom, (ii) are "investment professionals" falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (as amended) (the "Order"), (iii) are persons falling within Article 49(2)(a) to (d) ("high net worth companies, unincorporated associations etc.") of the Order or (iv) are other persons to whom an invitation or inducement to engage in investment activity (within the meaning of the Financial Services and Markets Act 2000) in connection with the issue or sale of any shares may otherwise lawfully be communicated or caused to be communicated (all such persons in (i), (ii), (iii) and (iv) together being referred to as "Relevant Persons"). This announcement is directed only at Relevant Persons and must not be acted on or relied on by persons who are not Relevant Persons. Any investment or investment activity to which this announcement relates is available only to Relevant Persons and will be engaged in only with Relevant Persons.

In the European Economic Area ("EEA"), This announcement is only directed at persons who are "qualified investors" within the meaning of Article 2(1)(e) of the Prospectus Directive (Directive 2003/71/EC) ("Qualified Investors"). This announcement must not be acted upon in any member state of the EEA by persons who are not Qualified Investors.