This Unstoppable AI Stock Is Up 97% Since Warren Buffett Bought It, and There Could Be More Upside Ahead Warren Buffett is no longer the CEO of Berkshire Hathaway (NYSE: BRKA) (NYSE: BRKB).
However, during his last year at the head of the company he spent decades building and leading, the Oracle of Omaha made several eye-catching investment decisions (or perhaps some members of his team did)
One of them was to purchase shares of Alphabet (NASDAQ: GOOG) (NASDAQ: GOOGL) in the third quarter of 2025. We don’t know the exact date when Berkshire Hathaway invested in Alphabet, but if we assume it did so at the midway point of the period, or Aug. 15, the stock is up about 97% since then (picking different dates throughout the third quarter yields very different performances, although all relatively strong). Here’s the good news: There are solid reasons to think Alphabet still has plenty of upside.
Buffett’s investing philosophy Buffett built and led Berkshire Hathaway with a specific investing philosophy in mind. His strategy has been to buy shares in great companies with strong competitive advantages at fair prices, and hold them for as long as possible. Several of the stocks in the conglomerate’s portfolio have been there for a long time: Coca-Cola is a notable example.