PRESENTATION OF INFORMATION THAT MAY HAVE A MATERIAL EFFECT ON THE VALUE OF SECURITIES OF THE JOINT-STOCK COMPANY

"ON 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 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 RAO UESR

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 ? 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 profit-making organization in which the stake held by the joint-stock company in the authorized capital (the percentage of ordinary shares owned by the joint-stock company) changed:

- Open Joint Stock Company "Kuban Power Sales Company" (JSC "Kuban Power Sales Company") – Russian Federation, 350000, Krasnodar, Gimnazicheskaya ul. , 55

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

- stake held by RAO UES of Russia in the authorized capital of JSC "Kuban Power Sales Company" – 49,00%, percentage of ordinary shares – 49,00% before change;

- stake held by RAO UES of Russia in the authorized capital of (percentage of ordinary shares in) JSC "Kuban Power Sales 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 entity:

- The operation related to the debiting of the client account of RAO UES of Russia for shares in JSC "Kuban Power Sales Company" was performed on June 29, 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

June 29, 2007