Jane Street Nearly Octuples Fidelity Bitcoin ETF Stake, Cuts BlackRock IBIT: 10 outlets compared - NewsCord

Jane Street simultaneously added nearly 9 million shares of the ARK 21Shares Bitcoin ETF (ARKB), worth about $249 million, and more than doubled its stake in BlackRock’s iShares Ethereum Trust ETF (ETHA) with an addition of 7.83 million shares valued at roughly $158 million.

The firm’s moves reflect a strategic reshuffle across competing spot Bitcoin ETF products, with Jane Street moving from a larger IBIT share count toward Fidelity’s FBTC and ARK 21Shares Bitcoin ETF (ARKB).

Investment advisers remained the dominant group at about $3.5 billion, or 66.6% of institutional holdings, while banks held $258 million or 4.9% of the total.

Major Banks Adjust Exposure

JPMorgan Chase increased its IBIT stake by 9.6% to 11.41 million shares, while nearly exiting ETHA by cutting it from 1.17 million shares to just 399.

Barclays expanded Bitcoin ETF exposure, with Barclays holding 3.94 million IBIT shares worth $187 million at the end of September, a 48% increase from the prior quarter.

Citigroup disclosed about $119 million in Fidelity’s FBTC and lifted its IBIT shares to roughly 521,000 from 347,000, an increase of about 50%.

What the Filings Imply

The third-quarter disclosures described the changes as a reshuffle across competing spot Bitcoin ETF products, with the data showing disclosed spot Bitcoin ETF holdings rising to $5.25 billion across 1,389 filers.

The reporting cautioned that IBIT gained about 41% in price during the third quarter, so part of the reported increase in position values could reflect market appreciation rather than fresh buying.

The filing reflected positions as of September 30, 2026, and did not capture any trading Jane Street did afterward.