Revenues (millions): $446,950.0
CEO: Michael T. Duke
slipped to No. 2 in the Fortune 500 in 2011 after holding onto the top spot for two years in a row. The retailer was forced to aggressively cut prices to reverse its declining same store sales in the U.S. That helped push revenues up by 6% during 2011, to $447 billion, but it hurt Wal-Mart's bottom line -- profits declined by 4.6% during the year, to $15.7 billion.
The world's largest retailer has struggled to maintain growth at its U.S. stores, even as the economy has shown signs of recovery. Although the unemployment rate has fallen, the housing market remains unstable and consumer spending hasn't reflected a new attitude for many Americans.
Wal-Mart's international business continues to be a source of growth for the company -- revenues outside the U.S. rose by 13.1% last year, to $35.5 billion. But one key growth market for Wal-Mart, Mexico, recently hit a major roadblock after a sweeping New York Times story reported bribery allegations by the retailer there.