Jane Street’s X4 Pharmaceuticals XFOR Stock Holding History

Jane Street’s Portfolio XFOR Stock Details XFOR Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q2	–	Sell	-1,527	Closed	-$10.8K	–	11092
2025 Q1	$10.8K	Buy	+1,527	New	+$21K	﹤0.01%	9197
2023 Q4	–	Sell	-640	Closed	-$20.9K	–	9910
2023 Q3	$20.9K	Sell	640 -2,243	-78%	-$97.8K	﹤0.01%	8299
2023 Q2	$168K	Buy	+2,883	New	+$148K	﹤0.01%	7750

Other funds holding XFOR

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

EAM

Empery Asset Management New York $83M AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

BCLSI

Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return

Perceptive Advisors New York $5.12B AUM 314.02% 1-Year Est. Return

SVCM

Saturn V Capital Management Austin, Texas $552M AUM 551.78% 1-Year Est. Return

DTC

Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return

KCM

Kalehua Capital Management Dallas, Texas $141M AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Braidwell Stamford, Connecticut $3B AUM 46.72% 1-Year Est. Return

Jane Street's XFOR Position: Q1 2026 in Review

Jane Street reduced its X4 Pharmaceuticals (XFOR) stake by 59% in Q1 2026, selling an estimated $203K and leaving 37,143 shares worth $153K. The position accounts for ﹤0.01% of the portfolio, ranked #10372.

Jane Street first reported a position in XFOR in Q2 2021 and has held it in 13 quarters since. The position peaked at $697K in Q2 2023. 84 funds tracked by Wall St. Rank hold XFOR as of Q1 2026.

Jane Street held 37,143 shares of X4 Pharmaceuticals worth $153K as of Q1 2026.
Jane Street sold 54,270 X4 Pharmaceuticals shares in Q1 2026, an estimated $203K.
X4 Pharmaceuticals made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10372 holding.
Jane Street first reported a position in X4 Pharmaceuticals in Q2 2021 and has held it in 13 quarters since.
Jane Street's X4 Pharmaceuticals position peaked at $697K in Q2 2023.
84 funds tracked by Wall St. Rank held X4 Pharmaceuticals as of Q1 2026.

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