UBS increased its holding in Strategy shares to 6.31 million MSTR shares with a total value of about $1.12 billion, according to its latest 13F filing with the U.S. Securities and Exchange Commission (U.S. markets regulator). The filing shows the Swiss bank recently purchased 551,121 additional shares worth about $98 million. Strategy, the company formerly known as MicroStrategy and widely tracked for its Bitcoin-focused treasury strategy, is often used by investors as an equity-market proxy for Bitcoin exposure.