Tatneft is a Russian vertically integrated oil and gas company with headquarters in the city of Almetyevsk, Republic of Tatarstan, Russian Federation. It is the fifth largest oil company in Russia and the eighth largest listed company in Russia by market capitalization. In the 2020 Forbes Global 2000, Tatneft was ranked as the 539th-largest public company in the world. Tatneft holds most of the exploration and production licenses and produces substantially all its crude oil in Tatarstan. Out of approximately 581.5 thousand barrels of oil produced daily 35.5% is refined at Tatneft's TANECO refinery. Tatneft is also involved in treatment and refining of associated petroleum gas, petrochemicals', mainly tires, production and marketing, manufacturing of equipment, engineering, procurement, and construction services for oil, gas and petrochemical projects and, from the fourth quarter of 2016 upon obtaining control over Bank ZENIT, in banking activities. Wikipedia