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10. ConocoPhillips
Fortune 500 rank: 5
2007 profit: $11.89 billion

The third-biggest U.S. oil company's earnings fell 24% in 2007.

The chief cause: Conoco recorded a $4.5 billion loss in Venezuela, where President Hugo Chavez started nationalizing foreign oil operations.

Yearly revenue only increased 3.5% to $179 billion.

NEXT: Goldman Sachs Group

Last updated April 24 2008: 11:07 AM ET