2. UAL The holding company that controls United Airlines returns to the Fortune 500 after emerging from bankruptcy in February 2006. With net income of $22.9 billion, it's the second-most profitable company on the list. However, UAL's big profits were mostly due to bankruptcy-related accounting. Revenues are up 11.3% over last year. |  Wal-Mart retakes the No. 1 slot on the Fortune 500 this year. See where America's largest corporations rank, and why. (more)  See the 37 companies that made both the Fortune 1000 and Best Companies to Work For lists this year. (more) |
