BitMine Immersion Technologies (NYSE:BMNR) rose 1.5% after BlackRock (NYSE:BLK) disclosed a 165.6% stake increase, adding to the $4.2 million BMNR shares purchase by Cathie Wood’s Ark Invest.

The Institutional Buying

BlackRock’s 13F-HR filing showed ownership jumped from 3.4 million shares to 9 million shares as of December 31, 2025, valued at $245.7 million. 

The asset manager increased its stake despite BitMine’s massive unrealized losses from Ethereum’s crash.

Additionally, Cathie Wood’s Ark Invest bought 212,314 shares across three ETFs on Thursday, expanding crypto exposure as BMNR trades 36.7% lower over the past month. 

The ETH Holdings

BitMine added 40,613 ETH in the past…

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