Billion-dollar unicorns you may have missed By: CNBC.com News May 13, 2015 at 11:37 AM EDT Other than high-tech Silicon Valley start-ups, here is a list of private companies that have attracted piles of cash from investors. Read More >> Related Stocks: Amazon.com Facebook First Solar Gopro Inc Cl A Intel Corp Laboratory Corp American Holdings Logitech Int S.A. Microsoft Quest Diagnostics Solaredge Tech Sunpower Corp Trinet Group Inc Vivint Solar Inc