Jane Street
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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
2026
Q2 		– Sell
-37,143
Closed -$153K – 13324
2026
Q1 		$153K Sell
37,143
-54,270
-59% -$203K ﹤0.01% 10372
2025
Q4 		$366K Buy
+91,413
New +$332K ﹤0.01% 8391
2025
Q3 		– Sell
-97,344
Closed -$185K – 11907
2025
Q2 		$185K Buy
+97,344
New +$398K ﹤0.01% 8611
2025
Q1 		– Sell
-19,449
Closed -$268K – 10791
2024
Q4 		$428K Buy
19,449
+11,167
+135% +$178K ﹤0.01% 7113
2024
Q3 		$166K Buy
8,282
+4,210
+103% +$87.9K ﹤0.01% 8762
2024
Q2 		$70.8K Buy
4,072
+1,490
+58% +$48.7K ﹤0.01% 8842
2024
Q1 		$108K Sell
2,582
-1,727
-40% -$48K ﹤0.01% 8504
2023
Q4 		$108K Buy
4,309
+3,863
+866% +$93.9K ﹤0.01% 8545
2023
Q3 		$14.6K Sell
446
-11,523
-96% -$503K ﹤0.01% 8343
2023
Q2 		$697K Buy
11,969
+11,250
+1,565% +$578K ﹤0.01% 5798
2023
Q1 		$18.8K Buy
+719
New +$21.1K ﹤0.01% 8660
2022
Q2 		– Sell
-1,228
Closed -$64K – 11064
2022
Q1 		$64K Buy
+1,228
New +$70.4K ﹤0.01% 9616
2021
Q3 		– Sell
-2,389
Closed -$466K – 10852
2021
Q2 		$466K Buy
+2,389
New +$601K ﹤0.01% 7379

Other funds holding XFOR

Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
BCLSI
Bain Capital Life Sciences Investors Boston, Massachusetts $1.68B AUM 126.09% 1-Year Est. Return
PA
Perceptive Advisors New York $6.66B AUM 360.84% 1-Year Est. Return
SVCM
Saturn V Capital Management Austin, Texas $697M AUM 628.57% 1-Year Est. Return
EAM
Empery Asset Management New York $86.5M AUM
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
KCM
Kalehua Capital Management Dallas, Texas $174M AUM
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Jane Street's XFOR Position: Q2 2026 in Review

Jane Street sold out of X4 Pharmaceuticals (XFOR) in Q2 2026, closing a stake of 37,143 shares — an estimated $153K sold.

Jane Street first reported a position in XFOR in Q2 2021 and held it in 13 quarters. The position peaked at $697K in Q2 2023. 89 funds tracked by Wall St. Rank hold XFOR as of Q2 2026.

  • Jane Street reported no remaining X4 Pharmaceuticals position as of Q2 2026 after selling out during the quarter.
  • Jane Street sold 37,143 X4 Pharmaceuticals shares in Q2 2026, an estimated $153K.
  • Jane Street first reported a position in X4 Pharmaceuticals in Q2 2021 and held it in 13 quarters.
  • Jane Street's X4 Pharmaceuticals position peaked at $697K in Q2 2023.
  • 89 funds tracked by Wall St. Rank held X4 Pharmaceuticals as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.