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Source: CNN Money. Exxon is the second largest company in the US as far as revenues go. However, its revenues have dropped by more than 7 percent from the previous year along with decreased oil production and increasing exploration expenditures.
Chevron is the worldâs third largest company according to the Fortune Global 500 in 2014. Chevron is the direct descendant of Standard Oil Company and was established after the merging of Standard Oil of California and Gulf Oil in 1984. John S. Watson currently serves as the CEO of the company.