BlockBeats News, August 1st, According to a filing submitted to the U.S. Securities and Exchange Commission (SEC) on Thursday, the publicly traded company with the most Bitcoin holdings globally, MicroStrategy (stock code MSTR), plans to raise up to $4.2 billion through the issuance of a new series of preferred stock. This financing plan comes just days after the company completed a nearly $2.5 billion STRC (Stretch) preferred stock offering.