After buying $1.07 billion of Apple stock in March, Berkshire Hathaway has boosted its total stake in the company to $1.46 billion, Reuters reports. Regulatory filings from the Omaha, Nebraska-based conglomerate showed the company had expanded its Apple holdings by 55 percent as of June 30, doubling down on the investment as other notable investors like George Soros and Carl Icahn are bailing on the company over concerns about Apple’s future…
