Global 500: The top 25

Wal-Mart retakes the lead on Fortune's annual list of the world's biggest companies. See which other outfits top our list.

China National Petroleum
24. China National Petroleum
Global 500 rank: 24 (Previous rank: 39)
2006 Revenues (millions): $110,520
Headquarters: Beijing
Country: China

CNPC is a Chinese state-owned company responsible for fossil-fuel extraction. While most of its oil is produced domestically, it has been aggressive overseas, especially in Africa. In Sudan, CNPC produces 226,000 barrels per day, or about 3% of China's total demand. Thanks to a 52% increase in foreign production last year, revenues were up 32% to $110.5 billion.

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