What to know:
- BlackRock ETF bought $128.33 million Bitcoin, extending IBIT’s weekly accumulation to approximately $478.5 million.
- IBIT captured 76% of roughly $626 million spot Bitcoin ETF inflows during the period.
- Arkham tracking shows IBIT holdings approaching 742,000 BTC, highlighting sustained institutional Bitcoin demand.
BlackRock ETF has purchased another $128.33 million in Bitcoin as institutional demand keeps rising in U.S. spot Bitcoin ETFs. BlackRock’s iShares Bitcoin Trust (IBIT) has continued to lead in such inflows this week, per data from Arkham, indicating around $478.5 million in daily Bitcoin buys.
The latest addition to inflows amounts to $128.33 million, according to crypto analyst Ash Crypto. As per tracking by Arkham, the transfers were made in batches of about 250 to 300 BTC, bringing the total amount of BTC held in the IBIT on-chain portfolio to about 742,000 BTC.
The buying also aligns with broader ETF flow data, establishing further links between blockchain and the actions of the regulated market. In particular, the United States spot Bitcoin ETFs saw a total of $626 million in combined inflows for the period. Out of this figure, IBIT accounts for 76%.
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BlackRock ETF Leads Institutional Bitcoin Demand
On-chain data indicates that investors in BlackRock Inc. may be shifting money from Bitcoin to its altcoin fund, since the company’s cryptocurrency portfolio has grown by more than $3.7 billion since early July.
According to data from Arkham Intelligence, BlackRock’s iShares Bitcoin Trust ETF (IBIT) saw a holding decline of 3,710 BTC, falling from 743,190 BTC on July 1, 2026, to roughly 749,480 coins on August 6. However, within the same time frame, BlackRock’s iShares Ethereum Trust ETF (ETHA) saw a rise of 196,340 Ethereum (ETH).
Spot Bitcoin ETFs provide exposure through brokerage accounts without requiring investors to manage private keys or wallets. BlackRock says IBIT simplifies operational and custody complexities associated with holding Bitcoin directly. The structure can broaden access, while regulated custody and established market infrastructure may appeal to investors seeking simpler Bitcoin exposure.
What Comes Next for Bitcoin ETFs
The immediate focus will be on whether IBIT continues recording daily purchases and whether other Bitcoin ETFs sustain the inflow trend. Continued creations could support demand for Bitcoin, while weaker flows would reduce that pressure. Market participants will also monitor ETF holdings, creations, and transfers for evidence of sustained institutional demand.
For investors, the latest data points to concentration in the BlackRock ETF rather than broad-based evidence across every market segment. The reported 742,000 BTC figure remains Arkham’s tracked estimate. The key takeaway is that institutional Bitcoin exposure continues expanding through regulated vehicles, while future BlackRock ETF flows will determine whether momentum persists.
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