According to the latest 13F filings, quantitative trading giant Jane Street significantly reduced its positions in several Bitcoin-related assets in the first quarter of 2026, while increasing its holdings in Ethereum ETFs and select crypto stocks.
Specifically, Jane Street's holdings in BlackRock's IBIT fell by approximately 71% quarter-over-quarter to 5.9 million shares, valued at roughly $225 million. Its position in Fidelity's FBTC decreased by about 60% to roughly 2 million shares, worth approximately $115 million.
Furthermore, its Strategy holdings dropped from about 968,000 shares in Q4 2025 to roughly 210,000 shares, with the position value declining from approximately $146 million to around $27 million. The firm also reduced its stakes in Bitcoin mining companies such as IREN, Cipher Mining, TeraWulf, and Core Scientific.
On the other hand, Jane Street significantly increased its Ethereum ETF holdings, with combined new positions in BlackRock's ETHA and Fidelity's ETH funds totaling approximately $82 million. Simultaneously, its positions in Riot Platforms, Coinbase, and Galaxy Digital all increased. Notably, the Galaxy Digital position surged from roughly 17,000 shares to about 1.5 million shares.