U.S. Ethereum spot ETFs experienced a significant net inflow of $84.59 million on December 22, 2025, according to crypto analyst Trader T. Grayscale's ETHE led the inflows with $53.7 million, while the Grayscale mini ETH ETF contributed $30.89 million. This surge in investment reflects robust demand in the Ethereum market, as indicated by on-chain data.