https://www.cnbc.com/2017/08/27/investors-skeptical-about-billion-dollar-unicorns--pitchbook.html >Investors are slowing their roll around so-called unicorns, or privately held companies with a valuation of $1 billion or more on paper. >According to a new report from PitchBook, only 17 U.S. companies have clicked over to unicorn status so far this year. In both 2014 and 2015 -- the peak unicorn years -- more than 40 companies newly hit or surpassed the $1 billion valuation mark.