In what is now looking like really awkward timing, Mark Zuckerberg has been selling stock in his own company faster than pretty much anyone on the planet as part of a planned divestiture. In September 2017, Mark announced that he would sell 35 million shares over 18 months to fund his philanthropic efforts. Mark sold 228,000 shares in March 8, 220,000 on March 9 and 245,000 shares on March 14. In total he sold 1.14 million shares at an average price of $183 resulting in $210 million. FYI – today Facebook's stock is trading at $163, so Mark's timing (while very planned out) is looking a little strange.