ARK Invest has expanded its stake in BitMine Immersion Technologies by $15.6 million, bringing its total investment to over $300 million. The firm acquired 339,113 shares across three of its ETFs, maintaining confidence in BitMine's Ethereum-focused strategy, despite a 7.85% drop in its stock. This follows ARK's earlier accumulation of over $200 million in BitMine stock. BitMine now holds the largest corporate Ethereum treasury globally, with 1.71 million ETH, valued at $8 billion.