According to Farside Investors, the ARK 21Shares Bitcoin ETF (ARKB) recorded a US$105.7 million net inflow on Sep 30, 2025; source: Farside Investors and farside.co.uk/btc. The figure is reported on Farside Investors' Bitcoin ETF Daily Flow tracker for U.S. spot BTC ETFs, where full methodology and disclaimers are provided; source: farside.co.uk/btc.