Jane Street Nearly Octuples Fidelity Bitcoin ETF Stake to $509 Million in Q3 Filing

Published November 13, 2026, 7:50 PM PKT. Based on Jane Street Group's Form 13F filed with the US Securities and Exchange Commission on November 12, 2026 (primary source), and reporting by crypto.news and Crypto Briefing on November 13, 2026 (secondary sources).

Trading giant Jane Street raised its stake in Fidelity's spot Bitcoin ($BTC) exchange-traded fund nearly eightfold in the third quarter of 2026, to 7.01 million shares worth $509.2 million, according to its Form 13F filed with the US Securities and Exchange Commission on November 12, 2026. The filing shows the firm rotated a large part of its Bitcoin ETF exposure toward Fidelity's fund while trimming its holding in BlackRock's competing product, and it added to its Ethereum ($ETH) ETF position at the same time.

The $509 million Fidelity position, up 691 percent in a quarter

Jane Street held 7,010,008 shares of the Fidelity Wise Origin Bitcoin Fund (FBTC) at September 30, 2026, up from 886,736 shares three months earlier, the filing shows. The position was valued at $509.2 million, compared with $45.3 million at the end of June. The addition of 6,123,272 shares represents an increase of about 691 percent in the number of shares held during the quarter, and the September position was almost 7.9 times the June figure.

The move reverses part of an earlier retreat from the fund. Jane Street had cut its FBTC shareholding by around 60 percent in the first quarter of 2026, crypto.news reported, before rebuilding it in the second quarter and then piling in during the third. The scale of the third-quarter buying also stands out against the firm's own history: it was the largest reported institutional holder of BlackRock's Bitcoin ETF at the end of June, after increasing that share count by 324 percent in the second quarter, according to data from 13F Pro cited by Crypto Briefing.

BlackRock shares fall 19 percent, but the stake is worth more

In BlackRock's iShares Bitcoin Trust (IBIT), Jane Street reported 20,221,140 shares at the end of September, down from 24,878,191 at June 30. The reduction of 4,657,051 shares works out to 18.7 percent of its earlier holding. Despite the smaller share count, the reported value of the position rose to $957.3 million from $828.2 million, because the fund's share price climbed over the quarter.

IBIT remains the largest US spot Bitcoin ETF, with about $56.3 billion in net assets as of November 12, according to BlackRock figures cited by crypto.news. The same 13F filing listed Jane Street's options on IBIT separately from its ordinary shares, reporting call options referencing 34.97 million shares and put options referencing 45.32 million shares.

ARKB nearly quadruples, and Ethereum exposure more than doubles

The rotation was not limited to Fidelity and BlackRock. Jane Street's holding in the ARK 21Shares Bitcoin ETF (ARKB) grew from 2,700,151 shares at the end of June to 11,689,194 shares by September 30, an addition of almost 8.99 million shares that left the position valued at $323.7 million, up from $52.5 million.

The firm also expanded its holding in BlackRock's iShares Ethereum Trust (ETHA). The reported share count rose from 7,606,021 to 15,438,249, a gain of about 7.83 million shares, and the stake was valued at about $310.6 million at the end of September, against $90.4 million at June 30. Across FBTC, IBIT and ARKB, Jane Street's combined reported Bitcoin ETF holdings rose in value from about $926 million in June to approximately $1.79 billion in September.

JPMorgan adds Bitcoin exposure, Laurore cuts by a third

Other large filers moved in different directions in the same quarter. JPMorgan Chase's November 12 filing showed 11.41 million IBIT shares worth about $540 million, up about 1 million shares, or 9.6 percent, from the previous quarter. The bank also raised its stake in Bitcoin treasury company Strategy by 36 percent to nearly 849,000 shares, worth about $131 million at the end of the quarter. At the same time, JPMorgan nearly erased its direct exposure to the iShares Ethereum Trust, cutting it from about 1.17 million shares at the end of June to just 399 shares.

Hong Kong-based Laurore moved the other way on Bitcoin, cutting its IBIT position by 1.6 million shares to 3,246,279, worth about $153.7 million, a 33 percent drop in its share count during the quarter. The disclosures follow earlier third-quarter filings from Barclays, which raised its IBIT stake by 48 percent, and Citigroup, which opened a new position in Fidelity's fund, both reported by MABOnChain on November 11, 2026.

What a September 30 snapshot can and cannot show

The figures carry an important limit. A Form 13F is a quarterly snapshot of what a manager held at the end of the quarter, and this filing reflects positions as of September 30, 2026. It does not capture any trading Jane Street did after that date, and it does not state why the firm increased its reported FBTC and ARKB shares or reduced its IBIT count. The dollar values are also frozen at September 30, before the November selloff that took Bitcoin ($BTC) below $69,000 and Ethereum ($ETH) below $2,000, so the positions would be worth less at today's prices than the filing shows.

The next round of filings is due by Monday, November 16, the quarterly 13F deadline, when the remaining large managers, including Millennium Management and Schonfeld, are expected to disclose their September 30 positions.

This article is news reporting and is not investment advice.

Sources

• US Securities and Exchange Commission, Form 13F-HR, Jane Street Group, LLC, filed November 12, 2026, period of report September 30, 2026 (primary source: 7,010,008 FBTC shares valued at $509.2 million at September 30, up from 886,736 shares at June 30; 20,221,140 IBIT shares valued at $957.3 million, down from 24,878,191 shares; IBIT call options referencing 34.97 million shares and put options referencing 45.32 million shares)
• crypto.news, Jane Street raises Fidelity Bitcoin ETF stake to $509M, cuts BlackRock IBIT shares, November 13, 2026 (secondary source: 691 percent FBTC increase, 6,123,272 shares added, combined FBTC, IBIT and ARKB value of about $1.79 billion versus about $926 million in June; ARKB 11,689,194 shares worth $323.7 million; ETHA 15,438,249 shares worth $310.6 million; JPMorgan 11.41 million IBIT shares worth about $540 million, up 9.6 percent; Laurore cut of 33 percent to 3,246,279 shares; IBIT net assets of about $56.3 billion as of November 12)
• Crypto Briefing, Jane Street boosts Fidelity Bitcoin ETF shares nearly 8x in Q3, November 13, 2026 (secondary source: Jane Street was the largest reported institutional IBIT holder at the end of June after a 324 percent share count increase in the second quarter, according to 13F Pro; the filing reflects positions as of September 30 and does not capture trading afterward; JPMorgan raised its Strategy stake by 36 percent to nearly 849,000 shares worth about $131 million and cut its ETHA position from 1.17 million shares to 399)