Jane Street Cuts Bitcoin ETF Holdings by 70% While Doubling Down on Ether Funds in Q1 2026
Jane Street cut its Bitcoin ETF holdings by 70% in the first quarter of 2026 while simultaneously doubling its exposure to Ether ETFs, according to 13F filings reviewed by Blockchain News. The shift is one of the largest institutional rotations between the two leading cryptocurrency ETF categories recorded in a single quarter.
Jane Street is one of the world’s most active market makers and a significant participant in exchange-traded fund liquidity provision. The firm’s positioning changes are closely watched by traders because they often reflect structural views on asset liquidity and fee economics rather than short-term price speculation.
The Filing Details
A Blockchain News report published May 14 cited Jane Street’s Q1 2026 13F disclosure as the source of the rotation data. 13F filings are quarterly SEC disclosures required of institutional investment managers with more than $100 million in assets under management.
They show long positions in US-listed securities, including ETFs, at the end of each quarter. The filings do not capture short positions or derivatives exposure, which means the 70% cut in Bitcoin ETF holdings reflects long-side repositioning only and may not represent Jane Street’s net view on Bitcoin price direction.
The firm did not issue a public statement explaining the rationale for the shift.
Jane Street regularly acts as a market maker and authorized participant for ETFs, meaning some of its ETF holdings may reflect inventory positions rather than proprietary directional bets.
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Background
Jane Street became prominent in cryptocurrency markets through its role as an authorized participant for spot Bitcoin ETFs when they launched in January 2024. Authorized participants are the institutional intermediaries that create and redeem ETF shares by delivering or receiving the underlying assets.
The firm’s deep involvement in both Bitcoin and Ether ETF mechanics gives its 13F data added significance compared to a typical asset manager’s filing.
In Q4 2025, most large market makers increased their Bitcoin ETF inventory as BTC rallied from $60,000 toward $79,000, driven by post-election macro Optimism (OP) and sustained institutional inflows. The Q1 2026 reversal, in which Jane Street cut Bitcoin ETF exposure by 70%, coincides with a period when Bitcoin (BTC) stalled near $79,000 and profit-taking from large holders weighed on price.
The doubling of Ethereum (ETH) ETF exposure in the same quarter aligns with a period of Ethereum ecosystem activity, including renewed DeFi volume and growing interest in restaking protocols.
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What the Rotation Suggests
Jane Street’s move does not mean the firm is bearish on Bitcoin. As a market maker, its ETF inventory is driven partly by client demand flow.
If retail and institutional clients have been net sellers of Bitcoin ETF shares and net buyers of Ether ETF shares, Jane Street’s inventory will reflect that imbalance. The 70% reduction in Bitcoin ETF long positions could indicate that client demand for BTC ETF shares softened in Q1 2026, requiring less authorized participant inventory to manage redemptions.
The Ether ETF doubling is a more distinct signal.
Spot Ether ETFs launched in the US in July 2024 and have attracted slower cumulative inflows than Bitcoin ETFs. If a major market maker is building Ether ETF inventory, it may be anticipating a pickup in client demand that has not yet materialized fully in public flow data.
Ethereum’s price has lagged Bitcoin through most of 2025 and early 2026, which some traders read as a setup for outperformance once the ETH/BTC ratio finds a floor.
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What to Watch
The next 13F cycle, covering Q2 2026 and due for public filing by mid-August 2026, will show whether Jane Street’s Ether ETF build continued or reversed. A sustained increase in Ether ETF long positions across multiple major market makers would be a stronger structural signal than a single quarter’s data.
Watch also for any public commentary from the firm at industry conferences, and for Ethereum ETF inflow data from fund issuers, which are disclosed weekly and would corroborate or contradict the directional shift implied by Jane Street’s Q1 repositioning.
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