Investment guru Warren Buffett's Berkshire Hathaway cut its holding in PetroChina again on Sept. 21.
It sold $102 million worth of shares in Asia's top oil and gas producer.
The move marked the fund's fifth reported sale of the stock since July 12.
Berkshire sold 66.6 million shares at an average price of HK$11.99 apiece, trimming its stake in PetroChina to 6.97 from 7.29% of the firm's free-floating shares, according to the Hong Kong stock exchange.
Shares in PetroChina hit a record high at HK$15.28 on Monday but they reversed gains to close down 3.4% at HK$14.1.