BlackRock, the world’s largest asset manager, transferred around 49,607 Ethereum and 340 Bitcoin to Coinbase Prime, the institutional trading and custody platform.

BlackRock holds around $86 billion in Bitcoin and over $16 billion in Ethereum through its spot ETF activities as of Sept. 25.

On September 17, 2025, BlackRock executed a similar transaction, depositing 4,538 ETH worth $20.4 million to Coinbase Prime while receiving 293.6 BTC worth $34 million, suggesting potential asset swaps or portfolio rebalancing.

BlackRock filed for a Bitcoin Premium Income ETF on September 27, 2025, which would use covered calls to generate yield on spot Bitcoin holdings. The filing builds on the success of its $86 billion IBIT ETF.