Bitmine Immersion Technologies has boosted its Ethereum reserves by 10,452 ETH over the past week, bringing its total to 6.05 million ETH. The value of its crypto assets, cash, liquid securities, and other investments has now reached $15 billion. In related news, Strategy announced a buyback of preferred shares worth $205 million. As of October 25, the company held 848,517 BTC along with $5.1 billion in dollar-denominated assets.