Federal Service on

Financial Markets

9 Leninsky prospect,

GSP-1, Moscow, V-49, 117939

Disclosure of a material fact

“Information on the inclusion in the Issuer’s share register of the holder of at least
5 per cent of the Issuer’s ordinary shares,
as well as on any change as a result of which the shares held by such shareholder
represent more or less than 5, 10, 15, 20, 25, 30, 50
or 75 per cent of the placed ordinary shares”

1. General information
1.1.Full corporate name of the Issuer / Open Joint Stock Company of Energy and Electrification Mosenergo
1.2.Abbreviated corporate name of the Issuer / АОMOSENERGO
1.3.Location of the Issuer / 8 Raushskaya Naberezhnaya, Moscow, Russian Federation, 115035
1.4. Principal state registration number of the Issuer / 1027700302420
1.5.Taxpayer Identification Number of the Issuer / 7705035012
1.6.The Issuer’s unique code assigned by the registration authority / 00085-А
1.7.Web page address used by the Issuer for the disclosure of information /
2. Subject matter of the disclosure
2.1.Full corporate name (for legal entities – commercial organizations) or name (for legal entities – non-commercial organizations), full name (for individuals) of the Issuer’s shareholder: Limited liability company Gazoenergeticheskaya kompaniya
2.2.Percentage of the Issuer’s ordinary shares held by such person before the change: no information is available.
2.3.Percentage of the Issuer’s ordinary shares held by such person after the change: 53.49%
2.4.Date on which the Issuer became aware of the change of the percentage of the Issuer’s ordinary shares held by such person, or, if such percentage changed as a result of placement of its additional ordinary shares, the date on which the Issuer received a written notice from the registration authority on the state registration of the report on the results of the additional issuance of the Issuer’s ordinary shares, or, if pursuant to the Federal Law “On the Securities Market” or other federal laws, the issuance of additional ordinary shares is carried out without a state registration of the report on the results of their additional issuance, the date of submission (delivery) by the Issuer of a notice on the results of the additional issuance of the Issuer’s ordinary shares to the registration authority:
May 26, 2009 – date of receipt of the list of persons entitled to participate in the annual general shareholders’ meeting of АО MOSENERGO; date of receipt of information on the fulfillment of the instruction to transfer securities registered on the securities account between ОАО Gazprom and OOO Gazoenergeticheskaya kompaniya on the basis of the decision of the sole founder of OOO Gazoenergeticheskaya kompaniya - ОАО Gazprom to contribute the ordinary shares of АО MOSENERGO held by ОАО Gazprom to the charter capital of OOO Gazoenergeticheskaya kompaniya
2.5.Reason for the change in the percentage of the Issuer’s ordinary shares held by the above person (acquisition or disposal by such person of the Issuer’s ordinary shares; placement by the Issuer of additional ordinary shares; decrease by the Issuer of its charter capital by redemption of a portion of the placed ordinary shares): contribution to the charter capital of OOO Gazoenergeticheskaya kompaniya of ordinary shares of АО MOSENERGO held by ОАО Gazprom on the basis of the decision of the sole founder of OOO Gazoenergeticheskaya kompaniya - ОАО Gazprom.
2.6.If the percentage of the Issuer’s ordinary shares held by the above person has changed as a result of acquisition or disposal by such person of the Issuer’s ordinary shares (with the exception of acquisition of additional ordinary shares of the Issuer in the course of their placement) – date on which the respective entry was made on such person’s personal account (securities account): April 23, 2009.
3. Signature
3.1. Investor Relations Director ______A.N. Zharikov
(signature)
acting on the basis of Power of Attorney No. 12-07/031-15
dated May 8, 2009
3.2. Date: May 26, 2009 [seal]

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