The Colorado-based Bitcoin miner purchased an additional 0.35 per cent of common shares of its Toronto-based rival Thursday, the latest in a series of share purchases following a rejected US$950-million takeover bid. (The Logic)

Talking point: Bitfarms has called Riot’s accumulation of shares “an attempt to undermine the integrity” of a strategic review the Canadian firm launched in late May after rejecting Riot’s offer. Earlier this week, Bitfarms implemented what Riot called a “poison pill,” granting other shareholders rights to purchase discounted stock that would dilute the stake of anyone who attempts to buy 15 per cent or more of the company. Riot has called for a special meeting of shareholders to shake up Bitfarms’ board, which Riot said has a “track record of poor corporate governance.” Bitfarms has called Riot’s governance concerns “hypocritical” and “a thinly veiled ploy.” Shares of Bitfarms rose nearly three per cent on the Toronto Stock Exchange.