Sibirtelecom OJSC — (RTS: ENCO/ENCOP, ENCOG/ENCOPG; МCSE: STKM/STKMP, ADR: SBTLY, Frankfurt and Berlin stock exchanges - ISIN: US8257351036, WKN: 260452) - one of the leading telecommunication services providers in Russia carrying out their activities on the territory of Siberian Federal District. At the regional market of telecommunication services the company accounts for 81% of local communication services, 86% of regional communication services, 47% of Internet access services, 17% of mobile communications, The company serves over 4 million subscribers of landline and over 2.3 million subscribers of mobile services. The principal shareholder is Sviazinvest OJSC (50.67% of the company's common shares)