JY
XFOR icon

Jeff Yass’s X4 Pharmaceuticals XFOR Stock Holding History

Jeff Yass’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 		$65.6K Sell
14,050
-842,172
-98% -$3.46M ﹤0.01% 12725
2026
Q1 		$3.54M Buy
856,222
+834,087
+3,768% +$3.12M ﹤0.01% 4922
2025
Q4 		$88.5K Buy
+22,135
New +$80.4K ﹤0.01% 11518
2025
Q3 		– Sell
-34,821
Closed -$89.8K – 14072
2025
Q2 		$66.2K Sell
34,821
-22,258
-39% -$91.1K ﹤0.01% 12013
2025
Q1 		$405K Sell
57,079
-5,841
-9% -$80.4K ﹤0.01% 9366
2024
Q4 		$1.38M Buy
62,920
+57,160
+992% +$911K ﹤0.01% 6144
2024
Q3 		$116K Buy
5,760
+2,136
+59% +$44.6K ﹤0.01% 10949
2024
Q2 		$63.1K Sell
3,624
-13,132
-78% -$429K ﹤0.01% 11310
2024
Q1 		$699K Buy
16,756
+3,325
+25% +$92.5K ﹤0.01% 7701
2023
Q4 		$338K Buy
13,431
+9,924
+283% +$241K ﹤0.01% 9575
2023
Q3 		$115K Sell
3,507
-4,541
-56% -$198K ﹤0.01% 10805
2023
Q2 		$468K Sell
8,048
-1,370
-15% -$70.4K ﹤0.01% 8470
2023
Q1 		$246K Buy
+9,418
New +$276K ﹤0.01% 10161
2022
Q4 		– Sell
-5,020
Closed -$238K – 13838
2022
Q3 		$258K Buy
+5,020
New +$173K ﹤0.01% 10200
2022
Q2 		– Sell
-1,177
Closed -$62K – 14080
2022
Q1 		$62K Sell
1,177
-1,432
-55% -$82.1K ﹤0.01% 12212
2021
Q4 		$179K Sell
2,609
-1,992
-43% -$252K ﹤0.01% 11583
2021
Q3 		$730K Buy
4,601
+3,304
+255% +$544K ﹤0.01% 8395
2021
Q2 		$253K Buy
+1,297
New +$326K ﹤0.01% 11126
2019
Q4 		– Sell
-680
Closed -$259K – 10784
2019
Q3 		$259K Buy
680
+284
+72% +$112K ﹤0.01% 8623
2019
Q2 		$178K Buy
+396
New +$201K ﹤0.01% 9231

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

Jeff Yass's XFOR Position: Q2 2026 in Review

Jeff Yass reduced its X4 Pharmaceuticals (XFOR) stake by 98% in Q2 2026, selling an estimated $3.46M and leaving 14,050 shares worth $65.6K. The position accounts for ﹤0.01% of the portfolio, ranked #12725.

Jeff Yass first reported a position in XFOR in Q2 2019 and has held it in 20 quarters since. The position peaked at $3.54M in Q1 2026. 88 funds tracked by Wall St. Rank hold XFOR as of Q2 2026.

  • Jeff Yass held 14,050 shares of X4 Pharmaceuticals worth $65.6K as of Q2 2026.
  • Jeff Yass sold 842,172 X4 Pharmaceuticals shares in Q2 2026, an estimated $3.46M.
  • X4 Pharmaceuticals made up ﹤0.01% of Jeff Yass's portfolio in Q2 2026, its #12725 holding.
  • Jeff Yass first reported a position in X4 Pharmaceuticals in Q2 2019 and has held it in 20 quarters since.
  • Jeff Yass's X4 Pharmaceuticals position peaked at $3.54M in Q1 2026.
  • 88 funds tracked by Wall St. Rank held X4 Pharmaceuticals as of Q2 2026.

Based on Susquehanna International Group's 13F filing for Q2 2026, filed 14 Aug 2026.