Jane Street’s XBiotech XBIT Stock Holding History

Jane Street’s Portfolio XBIT Stock Details XBIT Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2019 Q4	–	Sell	-10,000	Closed	-$105K	–	5864
2019 Q3	$105K	Buy	+10,000	New	+$81.4K	﹤0.01%	4790

Other funds holding XBIT

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

RBF Capital San Francisco, California $2.05B AUM 29.64% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

BCM

Bridgeway Capital Management Houston, Texas $4.97B AUM 44.96% 1-Year Est. Return

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Jane Street's XBIT Position: Q1 2026 in Review

Jane Street reduced its XBiotech (XBIT) stake by 14% in Q1 2026, selling an estimated $23.3K and leaving 60,100 shares worth $141K. The position accounts for ﹤0.01% of the portfolio, ranked #10432.

Jane Street first reported a position in XBIT in Q1 2020 and has held it in 11 quarters since. The position peaked at $1.58M in Q2 2020. 37 funds tracked by Wall St. Rank hold XBIT as of Q1 2026.

Jane Street held 60,100 shares of XBiotech worth $141K as of Q1 2026.
Jane Street sold 9,638 XBiotech shares in Q1 2026, an estimated $23.3K.
XBiotech made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10432 holding.
Jane Street first reported a position in XBiotech in Q1 2020 and has held it in 11 quarters since.
Jane Street's XBiotech position peaked at $1.58M in Q2 2020.
37 funds tracked by Wall St. Rank held XBiotech as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.