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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.
Some oil companies utilize patents as tools to negotiate new deals. Some of the largest and most productive oil companies in Canada are Suncor Energy, Inc. (NYSE: SU), Enbridge, Inc. (NYSE: ENB), Imperial Oil, Ltd. (AMEX: IMO), Canadian Natural Resources, Ltd. (NYSE: CNQ) and TransCanada Corp. (NYSE:TRP). Suncor is the largest company, in terms of total revenue, in Canada.