BlackRock clients buy $143.57M in Bitcoin through IBIT ETF

BlackRock’s iShares Bitcoin Trust (IBIT) pulled in roughly $143.57 million in net inflows in a single day, adding another data point to what has become a remarkably consistent pattern of institutional Bitcoin buying through the fund.

The purchase, facilitated through authorized participants who create new ETF shares backed by actual Bitcoin held in custody, reinforces IBIT’s position as the dominant vehicle in the US spot Bitcoin ETF landscape.

IBIT’s grip on the spot ETF market

IBIT has maintained its status as the largest US spot Bitcoin ETF by assets under management since launching in early 2024.

The fund captured $693 million out of $853 million in total spot Bitcoin ETF inflows in August 2026. That’s roughly 81% of all money flowing into the entire product category landing in a single fund. The rest of the field, which includes offerings from Fidelity, Ark Invest, and others, is essentially competing for scraps.

Multiple inflows around the $144 million mark have been recorded throughout 2026, suggesting this isn’t a one-off event but rather a recurring rhythm of institutional allocation.

The mechanics behind these flows involve custodians like Coinbase Prime, which holds the actual Bitcoin backing the ETF shares. Every time authorized participants create new IBIT shares to meet demand, real Bitcoin gets purchased and deposited into custody.