Exxon Mobil overtakes Wal-Mart to top Fortune 500

Exxon Mobil Corp. unseated Wal-Mart Stores Inc. in the 2009 Fortune 500 list, shrugging off the oil price bubble and weathering what the magazine called the worst year ever for the country's largest publicly traded companies.

 Wal-Mart had held the top spot for six of the last seven years but fell to No. 2 this year. Still, the retail giant's 2008 revenue climbed 7 percent to $405.6 billion, as the battered economy sent more consumers searching for bargains. The world's largest retailer took in $13.4 billion in annual profit, an increase of about 5 percent.