US spot Bitcoin ETFs recorded $462.7 million in net outflows during the four trading sessions from Tuesday through Friday, ending a three-week streak of inflows. Ether ETFs moved in the opposite direction, attracting $196.9 million over the same period.
The Bitcoin outflows followed the strongest three-week inflow run of 2026. Funds lost $166.8 million during the first two sessions of the shortened week, before withdrawals accelerated on Thursday. That day produced $282.7 million in net outflows, the largest single-day withdrawal since July. Friday added another $13.2 million in outflows.
ARKB leads Bitcoin ETF withdrawals
The ARK 21Shares Bitcoin ETF posted the largest weekly outflow at $234.2 million. Grayscale’s Bitcoin Trust ETF followed with $129.1 million, while BlackRock’s iShares Bitcoin Trust ETF saw $52.5 million leave the fund. Fidelity’s Wise Origin Bitcoin Fund recorded $50.7 million in net outflows.
Despite the weekly reversal, spot Bitcoin ETFs remained in positive territory for September, with approximately $307.3 million in cumulative net inflows through Friday.
Ether funds finish the week strongly
Spot Ether ETFs experienced mixed flows earlier in the week. They recorded $24.3 million in outflows on Tuesday, followed by $34.7 million in inflows on Wednesday and $29.9 million in outflows on Thursday.
A strong Friday performance pushed the group into positive territory for the week, with $216.4 million in net inflows on that day alone. BlackRock’s iShares Ethereum Trust ETF led Friday’s activity with $148.8 million, while the 21Shares Core Ethereum ETF attracted $29.1 million.
