7. Chevron Earnings of $17.1 billion were up 22% year-over-year, bolstered by Chevron's $16.4 billion acquisition of Unocal. That deal, as well as its 2001 purchase of Texaco, makes the company the second-largest U.S. oil outfit, behind Exxon Mobil. |  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) |
