BlackRock’s Crypto ETFs Drew $1.51 Billion in Five Trading Days

BlackRock’s crypto ETFs drew a reported $1.5104 billion over five trading days in September 2026, according to SoSoValue data cited by Finbold. The figure covers its Bitcoin fund, IBIT, and two Ethereum funds, ETHA and ETHB. It describes flows into investor-owned funds—not a $1.51 billion purchase for BlackRock’s own corporate account. 132

Which funds drove the inflows?

IBIT appears to have supplied most of the five-day total. A separate account puts its net inflows at about $1.19 billion and ETHA’s at $320.45 million. Finbold identifies ETHB as the third fund in the $1.5104 billion total, but the available excerpts do not give a reliable five-day figure for ETHB. Because the reported IBIT number is rounded, these figures cannot be used to calculate a precise ETHB contribution. The two reports also describe the period differently: Finbold discusses market changes through September 24, while the separate account says the five trading sessions ended September 23. 120

The clearest daily breakdown is for September 21. Finbold reported net inflows of $381.4 million into IBIT, $110.1 million into ETHA and $12.8 million into ETHB—a combined $504.3 million. ETHA subsequently drew $50.8 million on September 23, according to another report. These daily figures illustrate the pace of demand without supplying a complete five-session ledger. 3221

What do the asset figures establish?

BlackRock’s iShares product page lists $1.147 billion in net assets for ETHB as of September 23, 2026. The supplied evidence does not establish matching end-of-period asset figures for IBIT and ETHA, so it cannot verify the claimed $78.14 billion combined holdings. Net inflows and assets are different measures: an inflow total should not be treated as the funds’ ending asset value. 22

How does the broader market fit in?

Finbold reported that total crypto market capitalization rose by more than $260 billion between September 17 and September 24. That provides context for the ETF inflows, but it does not show that those inflows caused the wider market gain. Nor do the available figures establish BlackRock’s share of all U.S. spot Bitcoin or Ethereum ETF inflows during the five-session period. 1

The supported conclusion is substantial investor demand across BlackRock’s Bitcoin and Ethereum funds, with IBIT the largest reported contributor and a particularly strong day on September 21. Claims about a September 24 ETF inflow streak, precise five-day assets for all three funds, or BlackRock’s share of the broader ETF market require additional dated fund and market data. 12032