Group 1 - Berkshire Hathaway sold 20 million shares of Apple in Q2, reducing its holdings to 280 million shares valued at $57.4 billion, marking the first sale since Q3 2024 [1] - Apple remains the largest holding in Berkshire's portfolio, accounting for 22.31% of total holdings, despite a significant drop in its stock price, which has fallen over 30% since the end of 2024 [2] - Buffett has been selling Apple shares to lock in substantial profits and bolster a cash reserve exceeding $340 billion [7] Group 2 - Berkshire initiated new positions in several companies, including Anixter, Lamar Advertising, Horton Homes, UnitedHealth, Nucor Steel, and Lennar [10] - The company increased its stakes in Chevron, Pool Corporation, and Constellation Brands, while reducing its position in Bank of America and completely exiting T-Mobile US [10] - Following the disclosure of the 13F filing, shares of UnitedHealth rose over 10% in after-hours trading, with other newly acquired stocks also experiencing gains [11]