[UBS Group Increases Holdings by 551,100 Shares of MSTR Stock] According to the latest 13F quarterly holdings report disclosed by the U.S. SEC, UBS Group recently purchased 551,100 shares of MicroStrategy stock (MSTR), valued at approximately $98 million. Currently, the group holds a total of 6.31 million shares of MSTR stock, with a total holding value of approximately $1.12 billion.