Warren Buffett's Berkshire Hathaway has sold nearly $7 billion worth of Bank of America shares since mid-July, including $760 million between September 3 and September 5, reducing its stake to approximately 11.1%. Despite these sales, Berkshire remains the largest shareholder in Bank of America. Concurrently, Buffett celebrated his 94th birthday as Berkshire Hathaway reached a market capitalization of $1 trillion, becoming the first non-tech company to achieve this milestone. Under Buffett's leadership, the company has maintained a long-term, consistent investment strategy, achieving an annualized return of 19.8% since 1965. However, Buffett has recently reduced share buybacks as Berkshire's stock has surged 29.4% year to date, suggesting a cautious approach to valuation.