BlackRock added 27,722 BTC and 385,633 ETH to its spot ETF holdings over eight days, worth roughly $2 billion in Bitcoin and $961 million in Ethereum. The purchases push the firm's total crypto assets under management to $68.48 billion, up $15.11 billion in a single month.
BlackRock has scooped up 27,722 Bitcoin and 385,633 Ethereum over an eight-day stretch, representing roughly $2 billion in BTC and $961 million in ETH acquisitions through its spot ETF products. On-chain analytics firm Arkham Intelligence tracked the buying spree.
The purchases add to what has already been a banner month for BlackRock's digital asset portfolio. By late August 2026, the firm's total crypto assets under management had ballooned to $68.48 billion, up from $53.36 billion earlier in the month. That's a $15.11 billion increase in a single month, driven by a combination of fresh capital inflows and rising asset prices.
Inside the numbers
BlackRock's flagship Bitcoin ETF, IBIT, recorded approximately $1.33 billion in net inflows over a five-day period in mid-August alone. Its Ethereum counterparts, ETHA and ETHB, pulled in roughly $537 million during the same window.
A particularly aggressive 48-hour stretch around August 21 saw BlackRock-affiliated wallets absorb 11,098 BTC and 132,769 ETH, a haul worth approximately $1 billion. Coinbase Prime continues to serve as the primary custodian for these ETF holdings, and the operational machinery behind the scenes involves significant transfers between BlackRock-affiliated wallets and custodian accounts.
What this means for the market
At 27,722 BTC over eight days, BlackRock is absorbing far more than the roughly 450 BTC produced daily through mining. That means the ETF alone is soaking up weeks' worth of new Bitcoin supply in a matter of days, and it's just one of several spot Bitcoin ETFs competing for the same finite asset.
The $15.11 billion increase in BlackRock's crypto AUM during August reflects both new money entering and the price impact of that demand cycle feeding on itself.
Source: Crypto Briefing
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