Jane Street, the Wall Street market maker, reduced Bitcoin ETF holdings by 60-71% in Q1 2026 while simultaneously adding $82 million in Ether ETF exposure, according to a 13F filing published May 13. The firm held 5.9 million shares of BlackRock’s iShares Bitcoin Trust (IBIT)—worth approximately $225 million—and 2 million shares of Fidelity’s Wise Origin Bitcoin Fund (FBTC) at $115 million, representing sharp declines from the prior quarter. The move signals a strategic rebalancing among institutional investors toward Ethereum-based products.
Dramatic Reversal From Bitcoin Momentum
Jane Street’s repositioning marks a sharp reversal from just one quarter prior. In Q4 2025, the firm increased its MicroStrategy (MSTR) position by 473%, accumulating 968,000 shares worth $145.9 million. By Q1 2026, that position collapsed 78% to 210,000 shares valued at $27 million. The conflicting signals within consecutive quarters suggest tactical profit-taking rather than conviction-based allocation. Despite cutting MSTR and Bitcoin ETF exposure, Jane Street did increase holdings in Riot Platforms (RIOT) mining stock from 5 million to 7.4 million shares, worth $91 million, indicating selective Bitcoin sector positioning.
Ether Emerges as Institutional Preference
The $82 million addition to Ether ETF holdings—split between Grayscale’s ETHA and Fidelity’s FETH—reflects a broader institutional migration away from Bitcoin spot products. Jane Street also expanded positions in crypto infrastructure plays: Coinbase (COIN) holdings increased from 778,000 to 888,000 shares at $155 million, while Galaxy Digital (GLXY) surged from 17,000 shares ($380,000) to 1.5 million shares ($28 million). These moves coincide with Wells Fargo similarly increasing Ether ETF exposure during the same quarter, suggesting coordinated institutional repricing of Ethereum’s relative value.
Institutional Rotation Amid Market Volatility
Jane Street reported record Q1 2026 trading revenue of $16.1 billion, driven partly by volatile markets and AI-related gains. The firm’s crypto rebalancing occurs as institutional investors reassess Bitcoin’s dominance relative to Ethereum’s application layer growth. The 13F filing captures only long holdings and does not reflect Jane Street’s full trading book, short positions, or net crypto exposure. Broader shifts toward Ethereum by major institutions suggest changing risk-reward calculations, though no official rationale from Jane Street has been disclosed.
What Comes Next for Bitcoin Dominance
The filing provides no insight into Jane Street’s future strategy or whether these moves represent a sustained shift or tactical adjustment. The conflicting directional signals within back-to-back quarters—MSTR up 473% then down 78%—suggest the firm is actively trading rather than building long-term conviction. Market participants will monitor whether other major institutions follow with similar Ethereum-favoring reallocations in coming quarters.
