Core Viewpoint - Berkshire Hathaway, led by Warren Buffett, continues its cautious investment strategy, revealing significant changes in its stock portfolio for Q2, including new positions and reductions in major holdings [1][2][5]. Group 1: Investment Activities - As of June 30, Berkshire's disclosed long positions in U.S. stocks reached $257.5 billion [1]. - Berkshire initiated a new position in UnitedHealth, acquiring 5.039 million shares valued at $1.57 billion, leading to a post-announcement stock price surge of over 10% [1]. - The company increased its holdings in Chevron by 3.45 million shares, raising its market value by $495 million [1]. - New investments included 6.61 million shares of Nucor Steel valued at $857 million, 7.05 million shares of Lennar valued at $780 million, and over 148,000 shares of D.R. Horton valued at $191 million [4]. Group 2: Changes in Major Holdings - Berkshire reduced its stake in Apple by 20 million shares, decreasing its holding by 6.67% and reducing its market value by $4.1 billion, with the holding percentage dropping from 25.76% to 22.31% [2][3]. - The company also sold 26.3 million shares of Bank of America and reduced its positions in DaVita, Charter Communications, and F1 Group, while completely exiting its position in T-Mobile [1]. Group 3: Market Outlook - Buffett's investment approach remains cautious, with Berkshire selling approximately $3 billion worth of stocks in Q2, marking the 11th consecutive quarter of net stock sales [5]. - The company is waiting for more favorable market conditions to make new investments, as U.S. stocks are perceived to be increasingly expensive [5].