Jane Street Increases Fidelity ETF Stake While Cutting BlackRock

Trading firm Jane Street increased its holdings in Fidelity’s spot Bitcoin exchange-traded fund nearly eightfold during the third quarter of 2026 while reducing its share count in BlackRock’s competing fund by about 19%, according to BigGo Finance.

According to a Form 13F filing submitted to the U.S. Securities and Exchange Commission on November 12, Jane Street expanded its Fidelity Wise Origin Bitcoin Fund position by 691% to reach 7.01 million shares valued at $509.2 million as of September 30, up from 886,736 shares worth $45.3 million at the end of June.

BlackRock Holdings and Options

At the same time, the trading firm reduced its BlackRock iShares Bitcoin Trust ETF share count by 18.7% to 20.22 million shares. Despite the reduction in shares, the reported value of the BlackRock stake rose to $957.3 million from $828.2 million. The filing also listed separate options related to BlackRock's fund, including call options referencing 34.97 million shares and put options referencing 45.32 million shares.

Jane Street’s broader cryptocurrency ETF portfolio saw expansion across other products. The firm increased its ARK 21Shares Bitcoin ETF position to 11.69 million shares valued at $323.7 million, and more than doubled its holdings in BlackRock’s Ethereum ETF to 15.44 million shares worth approximately $310.6 million. Combined reported holdings in Fidelity, BlackRock, and ARK Bitcoin funds reached approximately $1.79 billion at the end of September.

Key facts

• Jane Street increased Fidelity Bitcoin ETF holdings by 691% to 7.01 million shares worth $509.2 million.
• The trading firm reduced BlackRock IBIT shares by 18.7% to 20.22 million shares, valued at $957.3 million.
• Combined reported holdings in FBTC, IBIT, and ARKB reached approximately $1.79 billion at the end of Q3.
• Jane Street expanded its BlackRock Ethereum ETF holdings to 15.44 million shares valued at about $310.6 million.