巴菲特，调仓大动作！

Core Insights - Berkshire Hathaway has made significant changes to its investment portfolio in the third quarter, including a new position in Alphabet and further reductions in Apple holdings [1][3]. Group 1: New Investments - Berkshire initiated a position in Alphabet, purchasing approximately 17.85 million shares, valued at around $4.34 billion, making it the tenth largest holding in the portfolio, accounting for 1.62% of total holdings [3][2]. - The investment in Alphabet is believed to have been influenced by investment managers Todd Combs or Ted Weschler, who have previously shown interest in technology stocks [3]. Group 2: Increased Holdings - Berkshire increased its stake in Chubb Limited (formerly known as ACE Limited) by approximately 4.3 million shares, raising its investment by $1.21 billion, with the holding percentage increasing from 3.04% to 3.31% [3]. Group 3: Reduced Holdings - Berkshire further reduced its stake in Apple by approximately 41.79 million shares, a decrease of over 14.92% from the previous quarter, although it still holds over 238 million shares valued at approximately $60.66 billion, making Apple the largest holding [5]. - The company also reduced its position in Bank of America by about 37.2 million shares, with the holding percentage dropping from 11.12% to 10.96% [5]. - Berkshire completely exited its position in D.R. Horton, selling all 1.4854 million shares, which is significant as the company is considered a barometer for the U.S. housing market [5].