BlackRock Moves $122M in Bitcoin to Coinbase in IBIT Custody Transfer
BlackRock moved 1,587 Bitcoin (BTC), worth approximately $122.55M, to Coinbase (COIN) in a 24-hour window ending May 22, alongside 17,815 Ethereum (ETH) valued at roughly $37.79M. On-chain analysts tied the transfers to BlackRock’s iShares Bitcoin Trust, known as IBIT, the largest spot Bitcoin exchange-traded fund by assets under management.
The combined transfer totals more than $160M. Movements of this scale from IBIT’s on-chain addresses to Coinbase custody wallets are a recurring topic worth monitoring as spot cryptocurrency ETF assets under management grow.
What the Transfer Signals
BlackRock’s IBIT uses Coinbase Prime as its primary custodian.
Transfers from IBIT’s on-chain Bitcoin addresses to Coinbase custody wallets are standard operational flows linked to ETF share creation and redemption cycles, not discretionary asset sales. On-chain analyst data, reported by CryptoRank on May 22, identified the specific wallet movements and matched them to known IBIT-affiliated addresses.
The 1,587 BTC figure represents roughly 0.01% of IBIT’s total holdings.
The Ethereum (ETH) portion is a separate data point. IBIT is a Bitcoin-only product, so the 17,815 ETH transfer likely corresponds to BlackRock’s iShares Ethereum Trust, or ETHA, which also custodies assets through Coinbase Prime.
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Background
Spot Bitcoin ETFs launched in the United States in January 2024, with BlackRock’s IBIT quickly becoming the dominant product by net inflows and assets.
IBIT surpassed $50B in assets under management faster than any ETF in history, a milestone that underscored the depth of institutional demand for regulated Bitcoin exposure. Coinbase secured the custodian role for IBIT from the outset, making large on-chain transfers between BlackRock’s identified wallets and Coinbase Prime a routine but closely watched indicator of ETF activity.
On-chain monitoring of IBIT addresses gained wider attention in 2025 after analysts demonstrated that wallet-level data could forecast net flow disclosures before official filings.
That dynamic has made transfers of this size a recurring signal for traders attempting to read institutional positioning in Bitcoin in near real time.
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What to Watch
Bitcoin held near $77,400 on May 22 as the broader cryptocurrency market traded sideways.
The BlackRock transfer does not on its own indicate a directional bet. Custody flows become more meaningful when correlated with subsequent ETF net flow disclosures, which BlackRock files daily.
If Thursday’s official IBIT flow data shows outsized creation activity, this transfer would confirm the on-chain read. Investors tracking IBIT positioning should watch the next disclosure for confirmation.
Any divergence between on-chain transfer volume and reported net flows would be a separate story worth examining.
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