Jane Street reduced several major Bitcoin-linked holdings in the first quarter of 2026, according to a 13F filing. The Wall Street trading firm cut its BlackRock iShares Bitcoin Trust position by 71% to 5.9 million shares and reduced its Fidelity Wise Origin Bitcoin Fund holding by 60% to about 2 million shares. It also lowered exposure to Strategy and several Bitcoin mining companies. At the same time, Jane Street added about $82 million in positions tied to BlackRock’s ETHA and Fidelity Ethereum ETF, marking a shift in listed crypto exposure from Bitcoin-related holdings toward Ether ETFs.