Warren Buffett's Berkshire Hathaway executed the complete divestment of its massive stake in PetroChina during the second half of 2007, selling off its entire portfolio of H-shares across multiple open-market transactions. Berkshire initially acquired its significant position in PetroChina back in 2002 and 2003 at relatively low valuations, ultimately realizing a staggering multi-billion-dollar profit as international crude oil prices and the company's market valuation surged. At the time of the sale, Buffett publicly noted that the company had achieved full valuation based on his long-term price assessments, prompting the conglomerate to lock in its historic gains and redeploy capital elsewhere.