Warren Buffett's position in PetroChina Ltd. - ADR is currently worth $30.9 Million. That's 0.01% of their equity portfolio (33rd largest holding). The first PetroChina Ltd. - ADR 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%.