Vanguard Group has increased its investment in the Bitcoin mining firms Marathon Digital Holdings and Riot Blockchain in two July 10 filings.
Vanguard now owns 17.5 million shares in Marathon. That number is shown in the line detailing the aggregate amount beneficially owned by each reporting person in a filing submitted to the U.S. Securities and Exchange Commission (SEC).
Another filing shows that Vanguard owns 17.9 million shares of Riot Blockchain, Marathon’s main competitor. Both filings were effective on June 30 but are dated July 10.
