Ethereum (ETH) treasury firm BitMine Immersion Technologies (BMNR) continued its share buyback spree last week after repurchasing 4.5 million shares of its common stock. This purchase brings the total stock buyback since July 1 to 16.1 million shares, part of a previously authorized $4 billion repurchase plan. The company also acquired 10,399 ETH last week, lifting its total holdings of the top altcoin to 5.797 million ETH. BitMine also reiterated that it has staked 4.917 million ETH from its holdings through its Made in America Validator Network (MAVAN). While BitMine continued share buybacks and ETH acquisition, its total cash and marketable securities fell to $173 million.