Jane Street told the SEC it held about $990 million in spot Bitcoin ETFs at the end of June. The 13F filing landed this week, and most of the coverage framed it the same way, as a top trading firm placing a near billion dollar bet on Bitcoin. The filing supports a quieter reading.
Jane Street is one of the anchor market makers for the very funds it disclosed. It has quoted these ETFs since they launched in early 2024, standing on both sides of the trade as an authorized participant. A 13F shows the long side of the book on a single day. It leaves out the shorts and the hedges sitting against that inventory.
Most of it sits in the fund Jane Street trades most
Of the $990 million, $828 million sat in BlackRock's IBIT, roughly 84 percent of the pile. The rest split between Fidelity's FBTC and Grayscale's GBTC. At quarter end that came to around 15,394 BTC of exposure.
| Fund | Value | Share of position |
|---|---|---|
| IBIT (BlackRock) | $828M | 84% |
| FBTC and GBTC | $162M | 16% |
| Total | $990M | about 15,394 BTC |
IBIT carries the deepest volume, and it takes the sharpest swings when ETF flows turn. So it is also where an active market maker parks the most inventory. Read that way, the breakdown looks less like conviction and more like a map of where Jane Street does its business. It lands in the same 13F season that showed institutions trimming while the big banks added.
The $15 billion number belongs to a different month
Plenty of headlines paired the ETF stake with a jarring figure, a roughly $15 billion loss, the firm's first losing month in about a decade. Two things fall out of that pairing. The loss came in July, the snapshot carries a June 30 date, and none of it touched Bitcoin. The money went into a stake in an AI hedge fund called Situational Awareness that ran into margin calls, plus wrong-way positions across Asian equity markets.
The firm still booked more than $40 billion in net trading revenue for the year so far. One rough month, in unrelated books, does not reprice a Bitcoin position held five weeks earlier.
What the filing actually settles
The 13F confirms something narrower than the headlines. Jane Street holds a large, IBIT heavy block of ETF shares, most of it likely tied to its market making rather than a call on price. The side where a firm like this expresses real direction, the derivatives book, never lands on this form. For that, watch the options and the flow, not a long-only snapshot from the last day of June.
