Shell Is Closing In on Exxon's Crown

Even in the dynamic world of business, some things always hold true: the Big Mac outsells the Whopper, Google gets more searches than Bing, and Exxon Mobil Corp. is the world’s biggest public oil company. Or perhaps not. Royal Dutch Shell Plc is the closest it’s ever been to attaining the long-coveted prize of overtaking its American rival.

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