HedgeCo.Net — U.S. spot Bitcoin ETFs recorded $999.0 million of total net inflows on September 21, 2026, according to Farside Investors’ daily table and FinanceFeeds coverage of the same session. BlackRock’s IBIT led with $381.4 million, followed by ARK 21Shares’ ARKB at $289.1 million and Fidelity’s FBTC at $238.8 million.
Additional positive prints included Bitwise’s BITB at $21.6 million, Morgan Stanley’s MSBT at $61.7 million, Grayscale’s GBTC at $3.3 million, and Grayscale’s BTC at $3.1 million, per the Farside breakdown. The session follows the September 18 inflow of $433.0 million already noted in HedgeCo’s prior daily and lifts cumulative spot Bitcoin ETF net inflows to roughly $56.23 billion on the Farside series.
For crypto product allocators, the $999.0 million session total and the IBIT / ARKB / FBTC split are the hard marks; fund-level creations beyond the published table, or motives behind the surge, should not be invented. Mark the September 18 contrast and the ~$56.23 billion cumulative print as sourced from Farside.