Group 1 - Berkshire Hathaway's total U.S. stock holdings decreased to $259 billion as of March 31, down from $267 billion in the previous quarter, with no new positions added and adjustments made to 15 stocks [2] - Bridgewater Associates significantly increased its position in Alibaba by 5.4 million shares, a 21-fold increase, making it the fourth-largest holding, while also building positions in gold ETFs and other Chinese stocks [2][3] - Hillhouse Capital's HHLR Advisors increased its total holdings from $2.887 billion to $3.539 billion, a nearly 23% increase, while continuing to invest in Chinese assets [4] Group 2 - Berkshire Hathaway completely exited its positions in Citigroup and Nu Holdings, while maintaining its 300 million shares in Apple [6] - Alibaba reduced its stake in XPeng by 3.08 million shares, representing an 8.13% decrease [8] - New positions were established in companies like Baidu and Li Auto, while Alibaba and BeiGene saw reductions in holdings [7]