Apple, Microsoft and Google hold 23% of all U.S. corporate cash, as tech sector accumulates wealth by Todd Bishop on May 23, 2016 at 8:15 amMay 23, 2016 at 8:34 am Apple CEO Tim Cook. (Credit: Apple) Apple, Microsoft and Google are the top three cash-rich U.S. companies across all sectors of business, not including banks and other financial institutions — holding a combined $391 billion in cash as