SIBUR is a Russian petrochemicals company founded in 1995 and headquartered in Moscow.

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.