Global trading firm Jane Street significantly reshaped its Bitcoin ETF portfolio during the third quarter of 2026, sharply increasing its reported holdings of the Fidelity Wise Origin Bitcoin Fund (FBTC) and cutting back on BlackRock’s iShares Bitcoin Trust (IBIT) shares, according to a newly filed Form 13F with the US Securities and Exchange Commission (SEC).
Major portfolio adjustment in Q3
Jane Street, a prominent market maker and quantitative trading firm, reported owning 7,010,005 shares of FBTC as of September 30, 2026. This marks a dramatic increase from the 886,657 shares listed for the previous quarter, raising its reported FBTC holdings by almost eightfold in one quarter. The total value of this FBTC position stood at $509.2 million.
At the same time, Jane Street decreased its IBIT holdings to 20,221,140 shares, valued at approximately $957.3 million. In the previous quarter, Jane Street reported 24,878,191 IBIT shares, split between two management entries. This reflects a 19% drop in the reported IBIT share count from Q2, even though the total dollar value of the stake increased due to market appreciation.
The firm’s position in the ARK 21Shares Bitcoin ETF (ARKB) also grew sharply. The Q3 filing lists 11,689,039 ARKB shares, representing a value of $323.7 million. In contrast, the earlier quarter showed 2,727,101 ARKB shares across two entries.
These disclosures come from the firm’s Form 13F for Q3, submitted to the SEC on November 12. The figures reflect Jane Street’s ETF holdings at the end of September and do not provide a real-time picture of its current positions.
Mini dictionary: Jane Street is a leading global proprietary trading firm known for its active role in exchanges and financial markets, including cryptocurrencies and ETFs, mainly operating as a liquidity provider with a focus on high-frequency trading strategies.
Jane Street’s reported ETF holdings shifted sharply in Q3 with a near-eightfold rise in FBTC shares and a simultaneous reduction in IBIT shares. This change signals significant portfolio rebalancing between major Bitcoin-backed funds.
Interpreting the data
The filings do not clarify why Jane Street increased its FBTC and ARKB holdings or reduced IBIT. Whether these changes indicate a shift in strategy, response to ETF liquidity, tracking error, or execution efficiency is not specified. Jane Street has not commented on the reasoning behind these trades, and the filings do not reveal activity that occurred after September 30.
Additionally, reported share counts do not equate to total economic risk or exposure; they represent a snapshot of registered ETF positions rather than a comprehensive picture of the firm’s trading activity or intent regarding Bitcoin’s price direction.
Comparison with other institutions
The Q3 institutional reports show notable differences among major players. While Jane Street shifted toward Fidelity’s FBTC, JPMorgan increased its IBIT holdings by 9.6% to 11.41 million shares. Conversely, Laurore reduced its IBIT position by 33%, now holding 3.25 million shares. These divergent moves point to an absence of consensus among institutions regarding the best-performing Bitcoin ETF or preferred allocation.
| Institution | FBTC Shares | IBIT Shares | ARKB Shares |
|---|---|---|---|
| Jane Street (Q3) | 7,010,005 | 20,221,140 | 11,689,039 |
| Jane Street (Q2) | 886,657 | 24,878,191 | 2,727,101 |
| JPMorgan (Q3) | – | 11,410,000 | – |
| Laurore (Q3) | – | 3,250,000 | – |
BlackRock’s iShares Bitcoin Trust, the largest of these funds by assets, reported net assets of $56.32 billion as of November 12. The size of IBIT underlines its prominence in institutional portfolios even as individual firms adjust their stakes.
Broader market and ETF outlook
Market conditions around the filing period reflected significant volatility. On November 13 at 10:37 UTC, Bitcoin traded at $69,275, down 5.73% over 24 hours, while Ether fell 4.75% to $1,951.22. The Crypto Fear & Greed Index was at 20, classed as Extreme Fear. Still, these price movements are not directly linked to Jane Street’s portfolio disclosures.
| Asset or indicator | Value | Date |
|---|---|---|
| Bitcoin (BTC) | $69,275, down 5.73% | November 13, 2026 |
| Ether (ETH) | $1,951.22, down 4.75% | November 13, 2026 |
| Crypto Fear & Greed Index | 20 (Extreme Fear) | November 13, 2026 |
Looking ahead, investors and market observers are waiting to see whether Jane Street’s next 13F filing will confirm a lasting portfolio shift or reveal further adjustments in ETF allocations. The quarterly filings remain a key source of information, providing insight into institutional ETF positioning, but do not serve as a real-time indicator of market sentiment or forecasts.
Share count disclosures are a backward-looking indicator, offering transparency into institutional ETF positions at quarter-end. However, these numbers do not necessarily reflect current risk or intended strategies for market direction.
