Facebook Chief Operating Officer Sheryl Sandberg has donated 290,000 shares of company stock, worth about $31 million, to several different charities. The majority of the money will go to women’s empowerment groups and Lean In, Sandberg’s nonprofit supporting women in the workplace, according to CNBC, citing an unnamed source familiar with Sandberg’s plans. The donations were made public in a document filed Thursday with the Securities and Exchange Commission, CNBC reported on Friday.  The stock was sold on November 20, 2015 and transferred to the Sheryl Sandberg Philanthropy Fund