- BlackRock added 667 BTC via Coinbase Prime in under 2 hours, revealing fast-paced ETF inflows and institutional buying precision.
- ETF custody data shows BlackRock holds 665,638 BTC worth $73B, confirming its dominant, accumulation-driven crypto ETF position.
- Ethereum flows show diverging strategy, with 2,148 ETH outflow and $81M inflow indicating reallocation or inter-fund balancing.
BlackRock has acquired 667.076 BTC worth $73.15 million through Coinbase Prime in under two hours, as reported on-chain. The rapid ETF inflows point to coordinated institutional accumulation amid rising Bitcoin market strength and growing ETF demand.
High-Frequency ETF Activity Signals Aggressive BTC Accumulation
According to the report, the transaction timeline began with a 300 BTC transfer, valued at $32.85 million, from Coinbase Prime’s hot wallet to BlackRock’s IBIT Bitcoin ETF. This was followed by another 67.076 BTC moved 20 minutes earlier and another identical 300 BTC transaction two hours before the latest one.
These three synchronized BTC transfers, all directed into BlackRock’s institutional ETF wallet, amount to 667.076 BTC. Collectively, they underscore intensifying BTC inflows into the IBIT structure, signaling precise capital positioning in the crypto ETF ecosystem.
ETF Custody Behavior Confirms Institutional Strategy
The ETF custody pattern was confirmed through blockchain transfer logs, with all transactions originating from Coinbase Prime. BlackRock’s IBIT alone saw an inflow of 3,067 BTC on June 11, contributing to a total daily ETF netflow of 3,880 BTC worth $425.66 million.
BlackRock’s total BTC holdings now stand at 665,638 BTC, with a market value of $73.03 billion. This makes it the leading institutional BTC custodian, emphasizing a long-term, accumulation-driven ETF strategy.
Ethereum Transfers Reflect a Diverging Asset Allocation
While Bitcoin is surging into ETF custody, Ethereum tells a different story. A separate transfer involving 2,148 ETH worth $5.98 million left BlackRock’s ETHA Ethereum ETF wallet and moved into an unlabeled address. The lack of clarity in the recipient suggests a more opaque or strategic ETH reallocation.
Interestingly, this contrasts sharply with BlackRock’s ETHA inflows reported by Lookonchain, where the fund gained 29,056 ETH worth $81.3 million on June 11. This implies a rotation between wallets or inter-ETF balancing within institutional Ethereum portfolios.
On-Chain Intelligence Reveals Deeper Patterns
According to Arkham Intelligence, BlackRock has purchased $570 million in Ethereum over the past two weeks. Their Ethereum wallet has consistently received inflows through Coinbase Prime, forming centralized inflow hubs, while outflows, particularly since April 2025, have fanned out to multiple destinations.
This split inflow-outflow strategy indicates that while accumulation continues, BlackRock may distribute assets across custodians or reallocate within ETF substructures. Such network data confirms not just the scale but also the complexity behind institutional crypto flows.
