Lookonchain
BlackRock transferred 4,577 BTC, worth roughly $272 million, and 41,996 ETH, worth about $65.2 million, to Coinbase Prime in a single deposit. The move was flagged by on-chain trackers monitoring the asset manager's known wallet cluster.
Why it matters
Coinbase Prime is the primary custodian and creation/redemption counterparty for BlackRock's spot BTC ETF (IBIT) and spot ETH ETF (ETHA). Large inbound deposits from BlackRock to that venue typically line up with in-kind creation flows, where authorized participants deposit underlying tokens to mint new ETF shares. The pairing of BTC and ETH in one transaction suggests coordinated share issuance across both funds rather than a one-off rebalance.
Market impact
Combined exposure moved in the move totals roughly $337 million at the time of the transfer. For BlackRock, which already runs the largest spot BTC ETF by assets, repeated Coinbase Prime deposits have become a routine signal of ETF demand still outpacing redemptions. The ETH leg is the more telling beat: spot ETH ETFs have trailed their BTC counterparts in cumulative inflows, and any signal that the issuer is sizing up ETH inventory alongside BTC carries weight for the demand narrative on the second-largest asset.
Traders will watch whether the next day's ETF flow print confirms the deposit with matching net inflows, or whether the transfer was internal treasury reshuffling without new share creation.
Frequently asked questions
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Why is BlackRock sending BTC and ETH to Coinbase Prime?
Coinbase Prime is the primary custodian and creation/redemption counterparty for BlackRock's spot BTC ETF (IBIT) and spot ETH ETF (ETHA). Large inbound deposits from the issuer typically align with in-kind creation flows, where authorized participants deposit underlying tokens to mint new ETF shares.
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Does this deposit mean new ETF shares were minted?
Not necessarily. The transfer is consistent with creation activity, but the confirmation comes from the next day's net inflow print for IBIT and ETHA. Without that confirmation, the move could also be internal treasury reshuffling.
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How much in total did BlackRock move in this transaction?
On-chain trackers flagged 4,577 BTC worth roughly $272 million and 41,996 ETH worth about $65.2 million, for a combined transfer of approximately $337 million at the time of the deposit.
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Why is the ETH portion of the deposit notable?
Spot ETH ETFs have lagged their BTC counterparts in cumulative inflows since launch, so any signal that the issuer is sizing up ETH inventory alongside BTC carries weight for the demand narrative on the second-largest asset.
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What should traders watch next?
The next daily ETF flow print for IBIT and ETHA is the key confirmation. Matching net inflows would confirm share creation; flat or negative prints would suggest the deposit was internal treasury reshuffling rather than new demand.
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