Investment firm D.E. Shaw has built a position in Riot Platforms and may push it to make changes, two sources familiar with the matter said, making it the second activist shareholder to do so at the cryptocurrency mining company.

Reuters could not determine the size of D.E. Shaw’s stake in Riot. Representatives for Riot and D.E. Shaw, which oversees $70 billion in assets, declined to comment.

D.E. Shaw’s purchase of a stake comes after Starboard Value late last year took an undisclosed position in Riot, which processes bitcoin transactions and receives the cryptocurrency as payment. Riot has said that it has held talks with Starboard.

Source: FINANCE.YAHOO