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Being the biggest oil company in Russia, Rosneft is also the largest publicly traded company in the world based on its hydrocarbon production volume. BP holds a 19.75 % share in Rosneft which makes it a beneficiary to a broad range of existing and future projects in Russia, a country that has huge hydrocarbon resources.
Today, PetroChina is one of the world's largest companies by market capitalization. It is also China's largest producer of oil and natural gas. Last year, the company's output from production included 932.9 million barrels of oil, as well as 2.8 trillion cubic feet of natural gas.