https://www.reuters.com/article/us-berkshire-buffet-apple/buffetts-berkshire-hathaway-bought-75-million-more-apple-shares-in-first-quarter-cnbc-idUSKBN1I506R >Berkshire Hathaway Inc bought 75 million additional Apple Inc shares in the first three months of the year, CEO Warren Buffett told CNBC on Thursday, aggressively ramping up its bets on the iPhone maker.