Legendary investor Warren Buffett is officially out as the CEO of Berkshire Hathaway Inc (NYSE:BRK)(NYSE:BRK) , ending a multi-decade run leading the conglomerate. After years of outperforming the S&P 500, 2025 was a year to forget for Buffett and marked a miss in his final year leading the company.Buffett Vs. S&P 500The S&P 500, tracked by the SPDR S&P 500 ETF Trust (NYSE:SPY) , set several records in 2025 and ended the year near all-time highs, with record levels reached during the week of Christmas.Overa ...