Core Insights - Warren Buffett made significant stock transactions last quarter, buying over $521 million in shares while selling more than $4.1 billion in stock, including 20 million shares of his largest holding, Apple [2][5] - The recent selling activity raises questions about Buffett's confidence in the stock market and his long-term investment strategy [2][5] Company Analysis - Berkshire Hathaway's initial investment in Apple began in early 2016, attributed to investment managers Todd Combs and Ted Weschler rather than Buffett himself, who traditionally avoids tech stocks [3][4] - From 2016 to 2018, Berkshire consistently increased its Apple holdings, but the company sold shares in 2019 and 2020, indicating a selective approach to holding the stock [4] - In 2024, Berkshire has begun to sell Apple shares at a rapid pace, offloading approximately 600 million shares last year and 20 million shares in Q2 2025, reducing its stake to about 280 million shares, which now represents over 24% of its publicly traded portfolio [5][6]