Wall Street's largest market maker and algorithmic trading firm, Jane Street, has disclosed a $990 million position in a Bitcoin ETF in documents filed with the U.S. Securities and Exchange Commission (SEC). This is a significant signal for the market, especially amid the company's recent financial turmoil.
Position Details: A Bet on BlackRock
According to the report as of June 30, the bulk of the investments are in BlackRock's iShares Bitcoin Trust (IBIT). It is important to understand that the 13F form only reflects a snapshot of long-term positions on a specific date—it does not show current assets or the company's trading strategies in real time.
For Jane Street, such maneuvers are standard practice. In the first quarter of 2026, the firm reduced its stake in IBIT by 71%, while simultaneously increasing investments in Ether ETFs. Such reshuffling is more about inventory management and hedging than an ideological bet on the rise or fall of the crypto market. Sharp changes in a market maker's reports often reflect client demand and risk balancing, rather than the personal expectations of management.
Context: Losses and Record Revenue
News of the position emerged the same week Jane Street confirmed a $15 billion loss in July—its worst result in nearly a decade. Most of the losses are tied to its stake in the AI-driven hedge fund Situational Awareness. Due to margin calls, the fund was forced to urgently sell off stocks in late July, and the situation was compounded by failed bets on Asian stock markets.
Notably, despite the losses, Jane Street's trading revenue for the year has already exceeded $40 billion, beating the record $39.6 billion for all of 2025. This points to high operational activity, but not to long-term investment preferences.
Whether the Bitcoin ETF positions grew after June 30 or were reduced will only become clear in the next 13F report, which the firm will publish in November. For now, $990 million is merely a one-time snapshot that does not prove the largest market maker is betting on BTC's rise.
My expert take: The market often overestimates the significance of 13F filings from market makers. For Jane Street, such positions are a tool for liquidity and hedging, not an investment signal. It is far more important to track the flow of funds into ETFs from retail and institutional investors—that is what determines the medium-term trend, not accounting snapshots.