Facebook shares were involved in some large transactions in recent days, with moves by Chief Operating Officer Sheryl Sandberg, board member Peter Thiel, and Russian Internet company Mail.ru Group making the news.

Sandberg sold $4.9 million in Facebook shares last week, at prices of between $27.49 and $28.28 apiece, Business Insider reported, citing a Securities and Exchange Commission filing.

Business Insider added that the sale represented about 1 percent of Sandberg’s holdings in the social network, and she still owns some $485 million worth of Facebook shares.

Business Insider also reported that Facebook board member and Andreessen Horowitz Co-Founder Marc Andreessen reported in an SEC filing that he received 15,344 Facebook shares from Founder Fund and Lembas, investment vehicles run by Thiel.

According to Business Insider, it is not clear from the SEC filing whether Founder Fund and Lembas still hold Facebook shares, as it only specifies a distribution to limited partners.

Finally, Bloomberg reported that Mail.ru Group will pay $899 million in special dividends, with investors receiving $4.30 per share as of March 20, after reducing its Facebook stake and exiting investments in Groupon and Zynga.