Bitcoin ETFs log $105M outflows as mystery IBIT buyer surfaces

US spot Bitcoin ETFs continue to see slowing outflows as investors and analysts examine Q4 2025 filings showing which institutions bought and sold crypto ETFs.

US spot Bitcoin exchange-traded funds (ETFs) posted $104.9 million in net outflows on Tuesday in the first trading session this week.

Total trading volume in spot Bitcoin (BTC) ETFs fell to just over $3 billion, down nearly 80% from a record $14.7 billion on Feb. 5, reflecting a continued slowdown in trading activity, according to SoSoValue data.

The outflows came as another round of institutions reported their Bitcoin ETF holdings for the fourth quarter of 2025, with Jane Street ranking as the second-largest buyer of BlackRock’s iShares Bitcoin ETF (IBIT) in Q4, buying $276 million.

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