Jane Street Holds More Than $1 Billion in Bitcoin ETFs, Led by BlackRock IBIT

Highlights:

• Jane Street reported more than $1 billion in U.S. spot Bitcoin ETF holdings for the second quarter.
• BlackRock’s IBIT was Jane Street’s largest Bitcoin ETF holding, valued at $828 million as of June 30.
• Jane Street also held Fidelity and Grayscale Bitcoin ETFs, taking its total reported exposure above $1 billion.

Jane Street reported more than $1 billion in U.S. spot Bitcoin ETF holdings at the end of the second quarter of 2026. The trading firm disclosed the positions in a Form 13F filed with the U.S. Securities and Exchange Commission (SEC) on August 14.

The filing shows Jane Street’s holdings as of June 30. Its largest Bitcoin ETF position was BlackRock’s iShares Bitcoin Trust (IBIT), valued at about $828 million. Jane Street also reported positions in other major Bitcoin ETFs, including Fidelity’s Wise Origin Bitcoin Fund and Grayscale’s Bitcoin Trust. These holdings took its total reported Bitcoin ETF exposure above $1 billion.

Jane Street Discloses Over $1 Billion in Bitcoin ETF Holdings, Led by BlackRock’s IBIT

Quant trading giant Jane Street disclosed more than $1 billion in U.S. spot Bitcoin ETF holdings as of June 30, with roughly $828 million invested in BlackRock’s IBIT and the remainder spread… pic.twitter.com/Kisz27i9XL

— Wu Blockchain (@WuBlockchain) August 18, 2026

BlackRock IBIT Was Jane Street’s Largest Bitcoin ETF Holding

BlackRock’s IBIT made up most of Jane Street’s reported Bitcoin ETF exposure. The roughly $828 million position was much larger than its holdings in other Bitcoin funds. The SEC filing, however, does not explain why Jane Street held these ETF shares. It only shows the securities in its portfolio at the end of the reporting period.

Jane Street is one of the world’s largest trading firms and is active across stocks, bonds, ETFs, and other financial markets. Because of this, the Bitcoin ETF positions could be linked to its trading activity rather than a long-term Bitcoin investment. The filing does not provide enough information to confirm the purpose.

Jane Street submitted the Form 13F on August 14, but the report covers holdings as of June 30. Therefore, the figures do not show the firm’s current Bitcoin ETF positions. Form 13F filings are released after the end of each quarter, meaning firms can change their positions before the information becomes public.

The latest filing nevertheless shows that Jane Street had more than $1 billion in reported U.S. spot Bitcoin ETF holdings at the end of June, with BlackRock’s IBIT accounting for the largest share.

UBS and Harvard Report Large BlackRock IBIT Holdings

UBS also increased its exposure to BlackRock’s iShares Bitcoin Trust during the second quarter. The Swiss banking giant reported about 2.5 million IBIT shares worth nearly $90 million as of June 30. That was up from roughly 549,000 shares at the end of 2025, showing a sharp increase in its reported Bitcoin ETF position. 

🚨HUGE: Swiss banking giant UBS boosts its Bitcoin ETF call exposure 24-FOLD in one quarter, per a new SEC filing.

The $7 TRILLION asset manager grew its bets on BlackRock's IBIT from 80,000 to 1.95 MILLION underlying shares, while also raising direct holdings 12% and cutting… pic.twitter.com/Dzk4hRx017

— Coin Bureau (@coinbureau) August 15, 2026

Harvard Management Company also kept a sizable position in BlackRock’s iShares Bitcoin Trust during the second quarter. Its August 14 SEC filing showed 3,044,612 IBIT shares worth about $101.4 million as of June 30. The share count was unchanged from March 31, when Harvard reported the same 3,044,612 shares valued at about $117 million.