Warren Buffett's position in PetroChina Ltd. is currently worth $30.9 Million. That's 0.01% of their equity portfolio (28th largest holding). The first PetroChina Ltd. trade was made in Q3 2002. Since then Warren Buffett bought shares seven more times and sold shares on three occasions. The investor's estimated purchase price is $92.8 Million, resulting in a loss of 67%.