Fortune 500 rank: 5 (Previous rank: 6)
2006 Revenues (millions): $172,451
Headquarters: Houston, TX
Get quote: COP
The company managed to boost profits by 15%, to $15.5 billion, on only 4% revenue growth. But with corroded pipes and bad weather disrupting production and transportation at its drilling operations in Alaska, the company struggled to replenish reserves. Of the 2.5 billion barrels that it added, all but 100 million of them were from acquisitions.
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