 Old-economy outfits top Fortune's annual Global 500 list, thanks to rising oil prices and a slew of mergers that drove record profits. (more)  Wal-Mart retakes the lead as the world's biggest company. See which other outfits top our list. (more)  Exxon Mobil leads our list of top earners this year. Which other companies are among the most profitable on the planet? (more) | |
