Jane Street Nearly Doubled Its Bitcoin ETF Book In Q3: What The Filing Really Shows

One of Wall Street’s biggest trading firms just showed its Bitcoin hand. But reading it correctly takes more than a glance at the headline numbers.

Jane Street’s latest Form 13F, filed with the SEC on Nov. 12, shows its combined stake in three major spot Bitcoin ETFs rose from about $926 million at the end of June to $1.79 billion by Sept. 30, according to sources.

The headline move is a reshuffle between the two biggest funds. Here is what changed, and what it does and does not tell Bitcoin investors.

From BlackRock To Fidelity

The standout change was in Fidelity’s Wise Origin Bitcoin Fund (FBTC). Jane Street grew its position from 886,736 shares to 7,010,008 shares, an increase of roughly 691%. The stake was worth $509.2 million at quarter-end, up from $45.3 million.

At the same time, it trimmed BlackRock’s iShares Bitcoin Trust (IBIT). Its share count fell about 19%, from 24.88 million to 20.22 million. Even so, the position’s value climbed to around $957 million as the ETF’s price rose.

The firm also held 11.69 million shares of the ARK 21Shares Bitcoin ETF (ARKB), worth about $324 million, sources confirmed.

A Rollercoaster Year For Jane Street’s Bitcoin Book

The Q3 filing caps a year of dramatic swings. In the first quarter, Jane Street cut its IBIT stake by about 71%, from roughly 20.3 million shares to 5.9 million, and reduced FBTC by around 60%.

Then it reversed course. By the end of June, it had rebuilt its IBIT position to 24.9 million shares, worth $828 million, with total spot Bitcoin ETF holdings near $990 million.

Now, after the latest quarter, its exposure across IBIT, FBTC and ARKB is at its highest level of the year.

Why A Market Maker’s Filing Is Different

Here is the catch most headlines skip. Jane Street is an authorized participant for several spot Bitcoin ETFs. It creates and redeems ETF shares as clients buy and sell, and it profits from keeping prices in line.

That means its quarter-end holdings often work more like inventory than a long-term bet. The filing also excludes derivatives, short positions and hedges, so the switch from IBIT to FBTC does not on its own reveal the firm’s net view on Bitcoin.