US spot Bitcoin exchange-traded funds pulled in about $2.65 billion in net inflows in September, based on Farside Investors data. That was down from the roughly $3.54 billion recorded in August. Still, it was the second-strongest month since November 2025, with only August ahead of it. The Block, citing SoSoValue data, reported that same $2.65 billion figure.
IBIT led monthly inflows
Farside’s compiled numbers show BlackRock’s iShares Bitcoin Trust (IBIT) brought in about $1.81 billion in net inflows during September. That was nearly 70% of the full total. Fidelity’s FBTC posted about $680 million in net inflows. Grayscale’s GBTC, by contrast, recorded about $260 million in net outflows.
Flows weakened mid-month before rebounding
September was not a straight line up. Far from it. Most trading days between Sept. 8 and Sept. 16 showed net outflows, including a $450 million outflow on Sept. 15. But flows snapped back hard starting on Sept. 21, when the group logged $999 million in single-day net inflows, the highest daily amount of the month.
Spot Ether ETFs brought in $830 million
Spot Ether ETFs took in about $830 million in net inflows in September. That was less than half of the roughly $1.85 billion posted in August. Farside data showed BlackRock’s ETHA made up about $490 million of that total.
Bitcoin and Ether ETF flows diverged at the start of October
Early October told a different story for the two product groups. On Oct. 1, spot Bitcoin ETFs recorded $103 million in net inflows, while spot Ether ETFs saw $55.4 million in net outflows.
The Block quoted Zeus Research analyst Dominick John as saying that continued inflows show institutional demand “has not faded” and point to “a more sustained recovery.”
According to CoinGecko data, as of 2 p.m. Taiwan time on Oct. 2, Bitcoin traded at $85,990, up about 2% over the previous 24 hours, while Ether stood at $2,725.