Facebook Inc. Chief Operating Officer Sheryl Sandberg sold 946,588 shares, netting about $26.2 million.

The shares were sold in multiple transactions at prices ranging from $27.30 to $27.90 apiece, Menlo Park, California-based Facebook reported in a filing with the U.S. Securities and Exchange Commission. Facebook, operator of the world’s largest social network, closed at $27.49 on Friday and has lost 28 percent since selling shares for $38 each in an initial public offering in May.

With the sale, Sandberg reduced her stake to 18.7 million shares, according to the filing.