According to @FarsideUK, Grayscale’s GBTC posted a net daily outflow of 22.4 million dollars on September 4, 2025, based on the Farside Investors Bitcoin ETF flow tracker, which compiles issuer-reported data (source: Farside Investors X post on Sep 4, 2025; source: Farside Investors bitcoin ETF flows dashboard at farside.co.uk/btc). This figure reflects GBTC-specific net flows and does not represent aggregate U.S. spot Bitcoin ETF flows for the day, which are listed separately on the same dashboard for cross-ETF comparison (source: Farside Investors bitcoin ETF flows dashboard at farside.co.uk/btc). For trading context, the dashboard provides per-ETF and total flow tables that traders can use to assess U.S. spot BTC ETF demand and GBTC’s share of flows on the date referenced (source: Farside Investors bitcoin ETF flows dashboard at farside.co.uk/btc).

According to @FarsideUK, U.S. spot Bitcoin ETFs recorded a weekly net inflow of $440.8 million. According to @FarsideUK, fund-level flows were IBIT $247.9m, ARKB $78.6m, BITB $46.2m, FBTC $33.5m, HODL $10.2m, BTCO $6.7m, EZBC $6.5m, BTCW $2.3m, BRRR $0, and GBTC -$15.3m. According to @FarsideUK, the concentration of net creations in IBIT and ARKB alongside continued GBTC net redemptions highlights where primary market demand and supply persisted this week.

According to @lookonchain, an SEC EDGAR filing shows a Harvard-affiliated portfolio reporting a $116.67M position in BlackRock’s U.S. spot Bitcoin ETF, surpassing a $101.51M gold holding and ranking as the 5th largest position in the reported portfolio (source: @lookonchain; source: SEC EDGAR filing linked by @lookonchain). For traders, this publicly disclosed institutional allocation provides a concrete data point to benchmark BTC exposure via U.S. spot ETFs when assessing demand and positioning (source: U.S. SEC, Form 13F public disclosure overview).