"CONCERNING THE ACQUISITION BY THE JOINT-STOCK COMPANY OF A STAKE IN THE AUTHORIZED (SHARE) CAPITAL (UNIT TRUST) OF THE OTHER PROFIT-MAKING ORGANIZATION WHICH CONSTITUTES AT LEAST 5 PERCENT OR A BLOCK OF ORDINARY SHARES IN THE OTHER JOINT-STOCK COMPANY WHICH CONSTITUTES AT LEAST 5 PERCENT AS WELL AS CHANGE IN SUCH BLOCK IF IT BECOMES HIGHER OR LOWER THAN 5, 10, 15, 20, 25, 30, 50 AND 75 PERCENT"

1. General Information

1.1. Full company name of the issuer: Unified Energy System of Russia

1.2. Short company name of the issuer: UES of Russia

1.3. Issuer's place of business: 119526, Moscow, pr. Vernadskogo, d. 101, korp. 3.

1.4. Issuer's OGRN (Primary State Registration Number): 1027700043293

1.5. INN (Taxpayer Identification Number): 7705018828

1.6. Issuer's unique code assigned by the registration agency: 00034-A

1.7. Webpage used by the issuer for disclosure of information:
https://www.rao-ees.ru/ru/info/docs/show.cgi?content.htm and https://www.rao-ees.ru/ru/investor/reporting/show.cgi?content.htm

2. Content of Statement

2.1. Full name and place of business of each profit-making organization in which the stake held by the joint-stock company (the percentage of ordinary shares owned by the joint-stock company) changed:

• Arkhangelsk Generation Company (Open Joint-Stock Company) (OAO Arkhangelsk Generation Company) – Russian Federation, 163000, Arkhangelsk, ulitsa Svobody, dom 3.

2.2. Stake held by the joint-stock company in the authorized capital and percentage of ordinary shares in subsidiaries and dependent business entities before and after change:

• stake held by RAO UES of Russia in the authorized capital of OAO Arkhangelsk Generation Company: 49.00%, percentage of ordinary shares: 59.05% before change;
• stake held by RAO UES of Russia in the authorized capital of (percentage of ordinary shares in) OAO Arkhangelsk Generation Company after change: 0.00 %.

2.3. Date of change in the stake held by the joint-stock company in the authorized capital of (percentage of ordinary shares in) the above-mentioned entities:

• Date on which an entry was made in the Unified State Register of Legal Entities about the termination of operation of ??? Arkhangelsk Generation Company: May 3, 2007.

3. Signature

Deputy Head of the Department for Corporate Governance and Shareholder Relations of the Corporate Center of RAO UES of Russia (under Power of Attorney No. 245 of December 19, 2006) I. A. Zenyukov

May 4, 2007 Seal