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2. China National Petroleum
2008 sales: $181 billion

Otherwise known as PetroChina, the world's largest company by market value boosted oil production this year amid rising oil prices and China's accelerating economy.

Last year marked its seventh straight year of increased output even as China's GDP growth slowed. And 2009 is widely expected to be number eight

In the second quarter, PetroChina earned $4.6 billion as Big Oil competitors like Exxon Mobil and Royal Dutch Shell posted declines. Its stock has risen 35% this year, allowing it to overtake Exxon as the world's biggest company by market cap.

NEXT: State Grid

Last updated October 21 2009: 11:01 AM ET
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