[Riot increases stake in Bitfarms, currently holds nearly 16% of shares] Golden Finance reported that according to a filing with the U.S. Securities and Exchange Commission (SEC) on July 31, Bitcoin miner Riot Platforms strengthened its acquisition strategy for rival Bitfarms this month by purchasing an additional approximately 10 million shares. SC 13D/A documents show that Riot currently holds 71.56 million of all outstanding shares of Bitfarms, worth $159.1 million, equivalent to a 15.9% stake in the Canadian miner. The acquisition was made shortly after the Ontario Capital Markets Tribunal ruled that Bitfarms' initial shareholder rights plan was invalid, which provided that if any entity acquired more than 15% of the company's shares, it would dilute the outstanding shares. Prior to this ruling, Riot held a 14.9% stake in Bitfarms.