Facebook Chief Operating Officer Sheryl Sandberg had approximately 91 million reasons to say, “Thank God it’s Friday,” last week, as her filings with the Securities and Exchange Commission last Friday showed that she netted some $91 million from selling off some of her shares in the social network.

According to Sandberg’s Form 4 filing, she disposed of 2,274,095 class-A common shares at $38.3909 apiece, as well as 91,500 at $38.8364 each, leaving her with a total of 12,632,775 shares in the company.

The Sheryl K. Sandberg 2008 Annuity Trust was also active, selling 6,496 at $38.3826 each, and 200 at $38.925, leaving it with a total of 1,698,022.