X4 Pharmaceuticals, Inc - XFOR

Detailed investor-level table based on 13F positions.

Shareholders (13F)

Quarter: Q1 2026 · Compare: Q4 2025
13D/13G major owners: Ownership tab.
Methodology: Market value and % of portfolio use SEC reported VALUE ($000). For PUT/CALL positions this reflects reported underlying exposure, not premium cash paid/received. Details.
Rows: 0
Investor History Status Shares held Market value ($000) % of portfolio Previous % Rank Change in shares % change in shares Source Date reported
MORGAN STANLEY History Added to 9,466,992 39,098 0.0% 0.0% 1 +1,258,977 15.34% Q1 2026 May 15, 2026
Empery Asset Management, LP History Reduced 8,944,118 36,939 44.5% 31.57% 2 -6,987 -0.08% Q1 2026 May 08, 2026
FMR LLC History Reduced 8,103,400 33,467 0.0% 0.0% 3 -395,700 -4.66% Q1 2026 May 15, 2026
Bain Capital Life Sciences Investors, LLC History No change 7,967,454 32,905 2.97% 2.44% 4 0 0.0% Q1 2026 May 15, 2026
PERCEPTIVE ADVISORS LLC History Added to 6,737,648 27,826 0.54% 0.45% 5 +423,196 6.7% Q1 2026 May 29, 2026
Saturn V Capital Management LP History Added to 6,456,646 26,665 4.83% 4.26% 6 +656,116 11.31% Q1 2026 May 15, 2026
Deep Track Capital, LP History Added to 6,339,535 26,182 0.43% 0.36% 7 +1,325,874 26.45% Q1 2026 May 15, 2026
Kalehua Capital Management LLC History No change 3,722,840 15,375 12.96% 14.73% 8 0 0.0% Q1 2026 May 15, 2026
VANGUARD CAPITAL MANAGEMENT LLC History New 3,497,612 14,445 0.0% 9 +3,497,612 New Q1 2026 May 15, 2026
VANGUARD GROUP INC History No change 3,423,662 13,694 0.0% 0.0% 10 0 0.0% Q4 2025 Jan 29, 2026
BRAIDWELL LP History Reduced 3,272,954 13,517 0.45% 0.43% 11 -95,950 -2.85% Q1 2026 May 15, 2026
Rosalind Advisors, Inc. History Added to 3,214,766 13,276 5.33% 3.66% 12 +608,846 23.36% Q1 2026 May 14, 2026
Blackstone Inc. History No change 2,681,922 11,076 0.04% 0.04% 13 0 0.0% Q1 2026 May 15, 2026
Trails Edge Capital Partners, LP History No change 2,571,478 10,620 2.43% 2.54% 14 0 0.0% Q1 2026 May 15, 2026
Nantahala Capital Management, LLC History No change 2,449,468 10,116 0.37% 0.32% 15 0 0.0% Q1 2026 May 15, 2026
BVF INC/IL History No change 2,233,742 9,225 0.29% 0.3% 16 0 0.0% Q1 2026 May 15, 2026
Samsara BioCapital, LLC History Reduced 1,832,566 7,568 0.74% 0.81% 17 -127,434 -6.5% Q1 2026 May 15, 2026
BlackRock, Inc. History Reduced 1,211,794 5,004 0.0% 0.0% 18 -15,014 -1.22% Q1 2026 May 13, 2026
MILLENNIUM MANAGEMENT LLC History Added to 1,210,514 4,999 0.0% 0.0% 19 +1,154,536 2062.48% Q1 2026 May 15, 2026
Woodline Partners LP History Added to 1,001,095 4,134 0.02% 0.02% 20 +240 0.02% Q1 2026 May 15, 2026
GEODE CAPITAL MANAGEMENT, LLC History Reduced 939,726 3,883 0.0% 0.0% 21 -721 -0.08% Q1 2026 May 15, 2026
GOLDMAN SACHS GROUP INC History Added to 882,134 3,643 0.0% 0.0% 22 +50,244 6.04% Q1 2026 May 15, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 856,222 3,536 0.0% 0.0% 23 +706,187 470.68% Q1 2026 May 15, 2026
STEMPOINT CAPITAL LP History Reduced 850,742 3,513 0.68% 0.62% 24 -47,723 -5.31% Q1 2026 May 15, 2026
VANGUARD FIDUCIARY TRUST CO History New 480,733 1,985 0.0% 25 +480,733 New Q1 2026 May 08, 2026
STATE STREET CORP History Added to 403,534 1,666 0.0% 0.0% 26 +205,300 103.56% Q1 2026 May 15, 2026
MARSHALL WACE, LLP History Added to 336,834 1,391 0.0% 0.0% 27 +256,378 318.66% Q1 2026 May 14, 2026
Stonepine Capital Management, LLC History Reduced 335,309 1,384 0.55% 1.73% 28 -258,264 -43.51% Q1 2026 May 14, 2026
Venrock Adviser, LLC History New 330,525 1,365 0.05% 29 +330,525 New Q1 2026 May 15, 2026
UBS Group AG History Added to 267,340 1,104 0.0% 0.0% 30 +263,211 6374.69% Q1 2026 May 05, 2026
Qube Research & Technologies Ltd History Added to 218,954 904 0.0% 0.0% 31 +151,207 223.19% Q1 2026 May 15, 2026
NORTHERN TRUST CORP History No change 178,235 736 0.0% 0.0% 32 0 0.0% Q1 2026 May 14, 2026
Pale Fire Capital SE History No change 167,590 692 0.06% 0.04% 33 0 0.0% Q1 2026 May 14, 2026
BANK OF AMERICA CORP /DE/ History Added to 150,676 622 0.0% 0.0% 34 +114,915 321.34% Q1 2026 May 15, 2026
Affinity Asset Advisors, LLC History No change 145,000 598 0.03% 0.03% 35 0 0.0% Q1 2026 May 14, 2026
Palumbo Wealth Management LLC History Added to 131,014 541 0.13% 0.11% 36 +17,657 15.58% Q1 2026 May 12, 2026
Brevan Howard Capital Management LP History New 127,321 525 0.0% 37 +127,321 New Q1 2026 May 15, 2026
Susquehanna Portfolio Strategies, LLC History Added to 102,599 423 0.01% 0.0% 38 +59,340 137.17% Q1 2026 May 15, 2026
Dynamic Technology Lab Private Ltd History New 36,221 384 0.06% 39 +36,221 New Q1 2026 May 15, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History Reduced 66,749 275 0.0% 0.0% 40 -39 -0.06% Q1 2026 May 15, 2026
OMERS ADMINISTRATION Corp History Reduced 57,300 236 0.0% 0.0% 41 -51,900 -47.53% Q1 2026 May 15, 2026
Hudson Bay Capital Management LP History Added to 50,287 207 0.0% 0.0% 42 +18,048 55.98% Q1 2026 May 13, 2026
Catalyst Funds Management Pty Ltd History New 47,383 195 0.03% 43 +47,383 New Q1 2026 May 11, 2026
JANE STREET GROUP, LLC History Reduced 37,143 153 0.0% 0.0% 44 -54,270 -59.37% Q1 2026 May 12, 2026
CITIGROUP INC History Added to 35,765 147 0.0% 0.0% 45 +3,433 10.62% Q1 2026 May 11, 2026
Vanguard Global Advisers, LLC History New 32,977 136 0.0% 46 +32,977 New Q1 2026 May 08, 2026
Diametric Capital, LP History New 28,973 119 0.03% 47 +28,973 New Q1 2026 May 15, 2026
STIFEL FINANCIAL CORP History Added to 21,789 89 0.0% 0.0% 48 +1,293 6.31% Q1 2026 May 12, 2026
Invesco Ltd. History New 19,968 82 0.0% 49 +19,968 New Q1 2026 May 12, 2026
Schonfeld Strategic Advisors LLC History New 19,514 80 0.0% 51 +19,514 New Q1 2026 May 15, 2026
Jefferies Financial Group Inc. History Reduced 19,474 80 0.0% 0.0% 50 -6,644 -25.44% Q1 2026 May 07, 2026
CAXTON CORP History No change 15,557 64 1.59% 1.45% 52 0 0.0% Q1 2026 May 14, 2026
ExodusPoint Capital Management, LP History Reduced 14,703 60 0.0% 0.0% 53 -64,369 -81.41% Q1 2026 May 14, 2026
TWO SIGMA INVESTMENTS, LP History Reduced 13,868 57 0.0% 0.0% 54 -3,378 -19.59% Q1 2026 May 15, 2026
Creative Planning History Reduced 13,819 57 0.0% 0.0% 55 -2,608 -15.88% Q1 2026 May 12, 2026
Virtu Financial LLC History Reduced 12,730 53 0.0% 0.0% 56 -9,759 -43.39% Q1 2026 May 14, 2026
Jump Financial, LLC History New 12,317 50 0.0% 57 +12,317 New Q1 2026 May 14, 2026
Vanguard Personalized Indexing Management, LLC History New 11,525 47 0.0% 58 +11,525 New Q1 2026 May 14, 2026
SummitTX Capital, L.P. History New 11,200 46 0.0% 59 +11,200 New Q1 2026 May 15, 2026
WINTON GROUP Ltd History New 10,600 43 0.0% 60 +10,600 New Q1 2026 May 12, 2026
Indivisible Partners History No change 10,000 37 0.0% 0.0% 61 0 0.0% Q1 2026 Apr 30, 2026
BNP PARIBAS FINANCIAL MARKETS History Added to 4,756 19 0.0% 0.0% 62 +4,245 830.72% Q1 2026 May 12, 2026
BARCLAYS PLC History Reduced 2,814 11 0.0% 0.0% 63 -54,686 -95.11% Q1 2026 May 14, 2026
SIGNATUREFD, LLC History Reduced 1,996 8 0.0% 0.0% 65 -758 -27.52% Q1 2026 Apr 07, 2026
CIBC Private Wealth Group LLC History No change 2,166 8 0.0% 0.0% 64 0 0.0% Q4 2025 Feb 12, 2026
PNC FINANCIAL SERVICES GROUP, INC. History No change 1,759 7 0.0% 0.0% 66 0 0.0% Q1 2026 May 08, 2026
State of Wyoming History New 1,065 4 0.0% 67 +1,065 New Q1 2026 May 13, 2026
ACADIAN ASSET MANAGEMENT LLC History New 802 3 0.0% 69 +802 New Q1 2026 May 13, 2026
Russell Investments Group, Ltd. History No change 729 3 0.0% 0.0% 68 0 0.0% Q1 2026 May 08, 2026
GROUP ONE TRADING LLC History Reduced 712 2 0.0% 0.0% 70 -187,386 -99.62% Q1 2026 May 13, 2026
Bleichroeder LP History No change 595 2 0.0% 0.0% 71 0 0.0% Q1 2026 May 14, 2026
Allworth Financial LP History Reduced 310 1 0.0% 0.0% 72 -405 -56.64% Q1 2026 May 14, 2026
Blue Trust, Inc. History No change 284 1 0.0% 0.0% 73 0 0.0% Q1 2026 Apr 20, 2026
Farther Finance Advisors, LLC History No change 331 1 0.0% 0.0% 74 0 0.0% Q1 2026 Apr 07, 2026
Siren, L.L.C. History Closed out 0 0 0.18% -1,500,000 -100.0% Q1 2026 May 14, 2026
Point72 Asset Management, L.P. History Closed out 0 0 0.0% -808,154 -100.0% Q1 2026 May 15, 2026
SILVERARC CAPITAL MANAGEMENT, LLC History Closed out 0 0 0.2% -357,387 -100.0% Q1 2026 May 14, 2026
CITADEL ADVISORS LLC History Closed out 0 0 0.0% -128,675 -100.0% Q1 2026 May 15, 2026
BALYASNY ASSET MANAGEMENT L.P. History Closed out 0 0 0.0% -64,505 -100.0% Q1 2026 May 15, 2026
Man Group plc History Closed out 0 0 0.0% -24,187 -100.0% Q1 2026 May 15, 2026
Lighthouse Investment Partners, LLC History Closed out 0 0 0.0% -22,200 -100.0% Q1 2026 May 14, 2026
Squarepoint Ops LLC History Closed out 0 0 0.0% -12,518 -100.0% Q1 2026 May 15, 2026
Tower Research Capital LLC (TRC) History Reduced 180 0 0.0% -10,266 -98.28% Q1 2026 May 15, 2026
JPMORGAN CHASE & CO History Reduced 33 0 0.0% -4,548 -99.28% Q1 2026 May 13, 2026
Fortitude Family Office, LLC History Closed out 0 0 -137 -100.0% Q1 2026 Apr 15, 2026
QUADRANT CAPITAL GROUP LLC History New 128 0 +128 New Q1 2026 May 13, 2026
Parallel Advisors, LLC History New 116 0 +116 New Q1 2026 May 07, 2026
NewEdge Advisors, LLC History Closed out 0 0 -33 -100.0% Q1 2026 May 15, 2026
ROYAL BANK OF CANADA History Added to 115 0 +11 10.58% Q1 2026 May 15, 2026
SBI Securities Co., Ltd. History Added to 54 0 +4 8.0% Q1 2026 Apr 27, 2026
JONES FINANCIAL COMPANIES LLLP History No change 38 0 0 0.0% Q1 2026 May 15, 2026
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO History No change 5 0 0 0.0% Q1 2026 May 07, 2026
Rockefeller Capital Management L.P. History No change 33 0 0 0.0% Q1 2026 May 14, 2026
HighMark Wealth Management LLC History No change 6 0 0 0.0% Q1 2026 May 05, 2026