Wall Street Thinks This Warren Buffett Stock Pick Has 27% Upside Bigc Studio / Shutterstock.com When Warren Buffett and Berkshire Hathaway Inc. (NYSE: BRK-A) part with shares of Apple Inc. (NASDAQ: AAPL), the largest stake in the Berkshire portfolio, it makes headlines. Of course it does. The so-called Oracle of Omaha is probably the best-known investor in the world, certainly one of the most successful. Millions of investors and aspiring investors still hang on his every word. So, is it time to dump Apple ...