Sitroniks OAO : 36.548% OF SITRONICS’ SHARES OFFERED FOR SALE UNDER RTI’s VOLUNTARY TENDER OFFER

MOSCOW, Russia - May 23, 2012 - JSC SITRONICS announces that according to notice received from OJSC RTI, 36.548% of Company's ordinary shares, including shares underlying the Company's Depositary Receipts, have been offered for sale by SITRONICS' minority shareholders under OJSC RTI's Voluntary Tender Offer ("VTO"), which was launched to acquire up to 36.926% of SITRONICS' ordinary shares from minority shareholders, and which was received by the Company on March 13, 2012.

The VTO acceptance period for SITRONICS shareholders expired yesterday, Tuesday, May 22, 2012.

The final results of the VTO will be announced when the shares offered for sale are transferred to OJSC RTI's account at OJSC Reestr.

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SITRONICS is a leading provider of telecommunication solutions, including software, equipment and systems integration, IT solutions and microelectronic solutions in Russia and the Commonwealth of Independent States with a strong presence in Central and Eastern Europe and a growing presence in the Middle East and Africa.

SITRONICS serves over 3,500 clients, maintains offices in 30 countries and exports its products and services to more than 60 countries.

SITRONICS' key Telecommunication Solutions operations are based in Moscow (Russia), Prague (Czech Republic) and Athens (Greece), while the company's IT Solutions and Microelectronics divisions are based in Kiev (Ukraine) and Zelenograd (Russia), respectively.

SITRONICS generated revenues of US$ 1,475.1 million for the full year of 2011 and had US$ 1,863.2 million of assets at the year end. SITRONICS is majority owned by OJSC RTI, which is the subsidiary of Sistema, the largest public diversified corporation in Russia and the CIS.

Some of the information in this press release may contain projections or other forward-looking statements regarding future events or the future financial performance of SITRONICS. You can identify forward-looking statements by terms such as "expect," "believe," "anticipate," "estimate," "intend," "will," "could," "may" or "might" the negative of such terms or other expressions. These statements are only predictions and actual events or results may differ materially. We do not intend to or undertake any obligation to update these statements to reflect events and circumstances occurring after the date hereof or to reflect the occurrence of unanticipated events. Many factors could cause the actual results to differ materially from those contained in our projections or forward-looking statements, including, among others, general economic conditions, our competitive environment, risks associated with operating in Russia, rapid technological and market change in our industries, and other factors specifically related to SITRONICS and its operations.