U.S. spot ETFs holding ether recorded $140 million in net outflows during the week ending Sept. 18, 2026, according to SoSoValue data. The outflow was the first since mid-August and interrupted four consecutive weeks of inflows totaling $1.94 billion. BlackRock’s ETHA posted the largest weekly outflow at $56.0456 million, while Bitwise’s ETHW saw $33.0821 million leave the fund. Grayscale’s Ethereum Mini Trust recorded the largest weekly inflow, at $16.2324 million. As of publication, total net assets in Ethereum spot ETFs stood at $16.720 billion, equal to 5.20% of Ethereum’s total market capitalization, while cumulative historical net inflows reached $13.250 billion.