Bitcoin miner Riot Platforms has strengthened its acquisition strategy against competitor Bitfarms by purchasing an additional approximately 10 million shares this month. As per the SC 13D/A filing submitted to the US Securities and Exchange Commission (SEC) on July 31, Riot currently holds 71.56 million of Bitfarms' outstanding shares, worth $159.1 million, equivalent to a 15.9% stake in the Canadian miner. This acquisition comes shortly after the Ontario Securities Commission ruled the initial shareholder rights plan of Bitfarms invalid, which stipulated that if any entity acquires over 15% of the company's shares, it would dilute the outstanding shares. Prior to this ruling, Riot held a 14.9% stake in Bitfarms.