
Bitcoin spot ETFs experienced substantial net inflows between September 15 and 19, with BlackRock’s IBIT dominating the gains, while Grayscale’s GBTC faced notable outflows.
From September 15 to 19, 2025, Bitcoin spot ETFs saw $887 million in net inflows. BlackRock’s IBIT accounted for $867 million, raising its total historical inflows to $60.64 billion. Grayscale’s Bitcoin Mini Trust (BTC) added $39.59 million, while GBTC experienced outflows of $86.14 million. The total net asset value of Bitcoin spot ETFs now stands at $152.31 billion, representing 6.63% of Bitcoin’s market cap.