Core Insights - Warren Buffett is preparing to step down as CEO of Berkshire Hathaway, indicating he will "go quiet" but still communicate through his annual Thanksgiving letter [1][8] - Berkshire Hathaway made a significant investment in Alphabet, purchasing over 17.8 million Class A shares valued at $4.9 billion, marking the largest addition in Q3 [2][5] - The company reduced its positions in Apple and Bank of America, with Apple seeing a nearly 15% cut, amounting to $10.6 billion, while Bank of America was reduced by 6.1%, or around $1.9 billion [5][7] Investment Activity - The purchase of Alphabet shares is notable as Buffett has historically avoided tech stocks, although he acknowledged missing opportunities with Alphabet in the past [3][4] - The increase in Alphabet shares led to a 3.5% rise in its stock during after-hours trading [2] - Despite the reduction in Apple shares, it remains Berkshire's largest equity position at $64.9 billion, constituting 21% of the portfolio [7] Leadership Transition - Greg Abel is set to take over as CEO, with Buffett gradually transferring responsibilities to him [4][9] - Buffett plans to continue engaging with shareholders through his Thanksgiving messages while stepping back from more public roles [9][10] Philanthropic Efforts - Buffett intends to increase lifetime gifts to foundations run by his children, raising the number of Class B shares donated from 300,000 to 400,000 [10] - The total value of gifts increased by 17% to $1.3 billion, reflecting Buffett's ongoing commitment to philanthropy [11]