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The desert kingdom has around 16% of the worldâs proven oil reserves and is the biggest global exporter of petroleum liquids. There is little doubt as to why its national oil company, Saudi Aramco, the biggest energy company in the world, generates over $1 billion in revenue every single day.
Saudi Aramco is deservedly #1 on this list. This company generates over $1 billion a day in revenue, produces the most barrels per day of any company and is sitting on the largest proven reserves in the world. This company began with Standard Oil of California striking oil in Saudi Arabia in the 1930s.