Gazprom neft' OAO ( Gazprom neft OJSC) formerly Siberian Oil Company OAO or Sibneft' OAO, is a Russia-based vertically integrated oil company. Its core activities include the oil and gas exploration, production and development of oil and gas fields, as well as the production and sale of refined outlets, distribution and marketing operations through its numerous retail filling stations. The export trade is conducted through a wholly owned Gazprom Neft Trading GmbH. The oil is exported through a pipeline system of AK Transneft'. It operates through one representative office in Yamal, one branch in Moscow, several representative offices, as well as a number of subsidiaries and affiliated companies located across the Russian Federation and abroad. The Company operates oil and gas deposits in Khanty-Mansiysk, Yamalo-Nanetsl and Chukotka Autonomous Districts and in Tomsk and Omsk Regions. As of December 31, 2011, the Company�s major shareholder was Gazprom OAO with a stake of 90%.