biggest energy companies in the us
The global energy consultancy PFC Energy has published the top 50 energy companies of the world for 2009 based on market cap. PetroChina (NYSE:PTR), the integrated National Oil Company [NOC] of China, is the highest ranked company with a market cap of $353 B. PetroChina beat last yearâs winner of the top spot ExxonMobil (NYSE:XOM) of the U.S.