Jane Street buys $630M in Bitcoin ETFs, total holdings reach $1B

Jane Street, one of the most influential quantitative trading firms on Wall Street, added $630 million worth of Bitcoin ETFs in the second quarter of 2026, pushing its total position to approximately $1.06 billion. For a firm that slashed those same holdings by roughly 71% just one quarter earlier, the reversal is striking. The numbers come from SEC 13F filings, the quarterly disclosures that require institutional managers holding over $100 million in US equities to report their positions. They are a snapshot in time, not a running tally, and Jane Street’s history with Bitcoin ETFs illustrates exactly why that distinction matters. A quarter of whiplash To understand the Q2 rebound, it helps to rewind to Q1 2026, when Jane Street cut its Bitcoin ETF exposure dramatically. The firm trimmed its position in BlackRock’s iShares Bitcoin Trust, ticker IBIT, from roughly 20.3 million shares valued near $790 million down to approximately 5.9 million shares worth $225 million. Its stake in Fidelity’s FBTC fell by about 60%, landing at around 2 million shares valued at $115 million. Jane Street operates as an authorized participant for several Bitcoin ETFs, including products from BlackRock a...