The products launched on July 23, 2024, and required 216 US trading sessions to accumulate their first $3 billion by May 30.
Following the $3 billion mark, spot Ethereum ETFs added the next $1 billion in just 15 trading days, lifting lifetime net subscriptions to $4.01 billion by the close of June 23.
Those 15 sessions represent 6.5% of the 231-day trading history but account for 25% of all cash committed so far.
Daily flow data show the inflection. ETHA absorbed more than $160 million on June 11 alone, and the complex booked five separate days above $100 million between May 30 and June 23.
Grayscale’s redemptions slowed during the same window, allowing aggregate flows to turn sharply higher.
ETHA and FETH charge 0.25% management fees, matching the sector median and undercutting ETHE’s 2.5% rate.
Lastly, larger rebalancing orders from multi-asset allocators, treating ETH as a portfolio extension rather than a standalone speculative bet, contributed to the surge in inflows.
The next quarterly Form 13F deadline in mid-July will reveal whether professional managers joined the late-spring push.
Through March 31, those firms accounted for less than 33% of spot Ethereum ETF assets, suggesting room for broader institutional uptake even as retail flows concentrate on low-fee vehicles.
