BlackRock, the world’s largest asset manager, accumulated over $1 billion worth of Bitcoin (BTC) and Ethereum ($ETH) through its spot ETFs in the first few trading days of May 2026.
Most inflows came via the iShares Bitcoin Trust, which drew $871.3 million across May 1, 4, and 5. The strongest day was May 4, with $335.5 million in inflows, one of the biggest single-day totals this year for any spot Bitcoin ETF.
On May 5, IBIT added another $251.4 million, while Grayscale Bitcoin Trust saw $18.4 million in outflows, underscoring BlackRock’s dominance. Earlier, on May 1, IBIT pulled in $284.4 million, setting the tone for sustained inflows.
Although Fidelity Investments’ FBTC also recorded strong activity, IBIT remained the leading vehicle for daily inflows among Bitcoin spot ETFs.
Beyond Bitcoin, BlackRock has also been steadily building its Ethereum position. Through its two Ethereum ETFs, ETHA and ETHB, the firm accumulated $175.8 million over the same three-day window.
BlackRock Ethereum scoop
ETHA, the larger of the two vehicles, accounted for the lion’s share, with its most notable single-day haul of $69.5 million recorded on May 5. ETHB, the firm’s second Ethereum product, contributed an additional $2.4 million that day.
May 1 saw the two Ethereum funds combine for $49.1 million, followed by $54.8 million on May 4, a figure entirely driven by ETHA, as ETHB recorded no inflows that session.
The steady climb across the week points to growing institutional appetite for Ethereum exposure through regulated ETF wrappers, a market that remains far smaller than Bitcoin’s but is increasingly drawing notable capital.
When combined, BlackRock’s Bitcoin and Ethereum ETF inflows for the first week of May total $1.047 billion, a figure that covers only three trading sessions.
The scale of these cryptocurrency flows reflects a broader shift in how institutional investors are approaching digital assets. Bitcoin ETFs across all providers posted a combined daily total of $467.3 million on May 5, with BlackRock alone accounting for more than half of that figure.
Indeed, the inflows come amid a broader recovery in the cryptocurrency market, with Bitcoin reclaiming the $80,000 level and Ethereum targeting $2,500.