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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.
Largest company: ChevronRevenue: $212.0 billionHeadquarters: San Ramon, CAOwnership: PublicChevron is one of the largest oil companies in the world. With revenues of $212 billion, Chevron is also the largest company in California, beating out the 52 other California-based Fortune 500 companies.