X4 Pharmaceuticals, Inc - XFOR

Detailed investor-level table based on 13F positions.
Early Q1 2026 data: only 2 institutional holders reported so far. The full shareholder list will grow as more funds file with the SEC.

Shareholders (13F)

Quarter: Q4 2025 · Compare: Q3 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
CAXTON CORP History New 15,557 62,227 1.45% 1 +15,557 New Q4 2025 Feb 13, 2026
Empery Asset Management, LP History New 8,951,105 35,804 31.57% 2 +8,951,105 New Q4 2025 Feb 11, 2026
FMR LLC History New 8,499,100 33,996 0.0% 3 +8,499,100 New Q4 2025 Feb 17, 2026
MORGAN STANLEY History Added to 8,208,015 32,832 0.0% 0.0% 4 +8,204,287 220072.08% Q4 2025 Feb 13, 2026
Bain Capital Life Sciences Investors, LLC History Added to 7,967,454 31,869 2.44% 0.55% 5 +5,530,866 226.99% Q4 2025 Feb 17, 2026
PERCEPTIVE ADVISORS LLC History New 6,314,452 25,257 0.45% 6 +6,314,452 New Q4 2025 Feb 17, 2026
Saturn V Capital Management LP History New 5,800,530 23,202 4.26% 7 +5,800,530 New Q4 2025 Feb 17, 2026
Deep Track Capital, LP History Added to 5,013,661 20,054 0.36% 0.11% 8 +3,891,177 346.66% Q4 2025 Feb 13, 2026
Kalehua Capital Management LLC History New 3,722,840 14,891 14.73% 9 +3,722,840 New Q4 2025 Feb 13, 2026
VANGUARD GROUP INC History Added to 3,423,662 13,694 0.0% 0.0% 10 +3,013,177 734.05% Q4 2025 Jan 29, 2026
BRAIDWELL LP History New 3,368,904 13,475 0.43% 11 +3,368,904 New Q4 2025 Feb 17, 2026
Blackstone Inc. History New 2,681,922 10,727 0.04% 12 +2,681,922 New Q4 2025 Feb 17, 2026
Rosalind Advisors, Inc. History Added to 2,605,920 10,423 3.66% 1.81% 13 +1,061,313 68.71% Q4 2025 Feb 12, 2026
Trails Edge Capital Partners, LP History New 2,571,478 10,285 2.54% 14 +2,571,478 New Q4 2025 Feb 17, 2026
Nantahala Capital Management, LLC History Added to 2,449,468 9,797 0.32% 0.26% 15 +221,118 9.92% Q4 2025 Feb 13, 2026
BVF INC/IL History No change 2,233,742 8,934 0.3% 0.31% 16 0 0.0% Q4 2025 Feb 17, 2026
Samsara BioCapital, LLC History New 1,960,000 7,840 0.81% 17 +1,960,000 New Q4 2025 Feb 17, 2026
Siren, L.L.C. History New 1,500,000 6,000 0.18% 18 +1,500,000 New Q4 2025 Feb 13, 2026
BlackRock, Inc. History Added to 1,226,808 4,907 0.0% 0.0% 19 +1,164,874 1880.83% Q4 2025 Feb 12, 2026
Woodline Partners LP History New 1,000,855 4,003 0.02% 20 +1,000,855 New Q4 2025 Feb 17, 2026
GEODE CAPITAL MANAGEMENT, LLC History Added to 940,447 3,763 0.0% 0.0% 21 +860,789 1080.61% Q4 2025 Feb 09, 2026
STEMPOINT CAPITAL LP History Added to 898,465 3,593 0.62% 0.38% 22 +343,054 61.77% Q4 2025 Feb 17, 2026
GOLDMAN SACHS GROUP INC History New 831,890 3,327 0.0% 23 +831,890 New Q4 2025 Mar 25, 2026
Point72 Asset Management, L.P. History Added to 808,154 3,232 0.0% 0.0% 24 +786,488 3630.06% Q4 2025 Feb 17, 2026
Stonepine Capital Management, LLC History Reduced 593,573 2,374 1.73% 2.94% 25 -462,765 -43.81% Q4 2025 Feb 13, 2026
SILVERARC CAPITAL MANAGEMENT, LLC History New 357,387 1,429 0.2% 26 +357,387 New Q4 2025 Feb 12, 2026
STATE STREET CORP History Added to 198,234 792 0.0% 0.0% 27 +159,500 411.78% Q4 2025 Feb 13, 2026
GROUP ONE TRADING LLC History Reduced 188,098 752 0.0% 0.0% 28 -30,100 -13.79% Q4 2025 Feb 12, 2026
NORTHERN TRUST CORP History New 178,235 712 0.0% 29 +178,235 New Q4 2025 Feb 17, 2026
Pale Fire Capital SE History Reduced 167,590 670 0.04% 0.07% 30 -13,261 -7.33% Q4 2025 Feb 13, 2026
SUSQUEHANNA INTERNATIONAL GROUP, LLP History Added to 150,035 600 0.0% 0.0% 31 +22,135 17.31% Q4 2025 Feb 17, 2026
Affinity Asset Advisors, LLC History New 145,000 580 0.03% 32 +145,000 New Q4 2025 Feb 13, 2026
CITADEL ADVISORS LLC History New 128,675 514 0.0% 33 +128,675 New Q4 2025 Feb 17, 2026
Palumbo Wealth Management LLC History Added to 113,357 453 0.11% 0.1% 34 +18,030 18.91% Q4 2025 Jan 21, 2026
OMERS ADMINISTRATION Corp History New 109,200 436 0.0% 35 +109,200 New Q4 2025 Feb 13, 2026
JANE STREET GROUP, LLC History New 91,413 365 0.0% 36 +91,413 New Q4 2025 Feb 12, 2026
MARSHALL WACE, LLP History New 80,456 321 0.0% 37 +80,456 New Q4 2025 Feb 13, 2026
ExodusPoint Capital Management, LP History New 79,072 316 0.0% 38 +79,072 New Q4 2025 Feb 17, 2026
Qube Research & Technologies Ltd History New 67,747 270 0.0% 39 +67,747 New Q4 2025 Feb 17, 2026
CHARLES SCHWAB INVESTMENT MANAGEMENT INC History New 66,788 267 0.0% 40 +66,788 New Q4 2025 Feb 13, 2026
BALYASNY ASSET MANAGEMENT L.P. History New 64,505 258 0.0% 41 +64,505 New Q4 2025 Feb 17, 2026
BARCLAYS PLC History New 57,500 230 0.0% 42 +57,500 New Q4 2025 Feb 13, 2026
MILLENNIUM MANAGEMENT LLC History Reduced 55,978 223 0.0% 0.0% 43 -8,817 -13.61% Q4 2025 Feb 17, 2026
Susquehanna Portfolio Strategies, LLC History New 43,259 173 0.0% 44 +43,259 New Q4 2025 Feb 17, 2026
BANK OF AMERICA CORP /DE/ History Added to 35,761 143 0.0% 0.0% 45 +16,457 85.25% Q4 2025 Feb 17, 2026
CITIGROUP INC History Added to 32,332 129 0.0% 46 +32,300 100937.5% Q4 2025 Feb 13, 2026
Hudson Bay Capital Management LP History New 32,239 128 0.0% 47 +32,239 New Q4 2025 Feb 13, 2026
Jefferies Financial Group Inc. History New 26,118 104 0.0% 48 +26,118 New Q4 2025 Feb 09, 2026
Man Group plc History New 24,187 96 0.0% 49 +24,187 New Q4 2025 Feb 17, 2026
Virtu Financial LLC History New 22,489 90 0.0% 50 +22,489 New Q4 2025 Feb 23, 2026
Lighthouse Investment Partners, LLC History New 22,200 88 0.0% 51 +22,200 New Q4 2025 Feb 17, 2026
STIFEL FINANCIAL CORP History New 20,496 81 0.0% 52 +20,496 New Q4 2025 Feb 13, 2026
TWO SIGMA INVESTMENTS, LP History Added to 17,246 68 0.0% 0.0% 53 +3,378 24.36% Q4 2025 Feb 17, 2026
Creative Planning History New 16,427 65 0.0% 54 +16,427 New Q4 2025 Feb 17, 2026
Squarepoint Ops LLC History New 12,518 50 0.0% 55 +12,518 New Q4 2025 Feb 13, 2026
Tower Research Capital LLC (TRC) History Reduced 10,446 41 0.0% 0.0% 56 -233 -2.18% Q4 2025 Feb 17, 2026
Indivisible Partners History New 10,000 40 0.0% 57 +10,000 New Q4 2025 Feb 03, 2026
JPMORGAN CHASE & CO History Added to 4,581 18 0.0% 58 +4,548 13781.82% Q4 2025 Feb 11, 2026
UBS Group AG History Reduced 4,129 16 0.0% 0.0% 59 -155,706 -97.42% Q4 2025 Jan 29, 2026
SIGNATUREFD, LLC History New 2,754 11 0.0% 60 +2,754 New Q4 2025 Jan 20, 2026
CIBC Private Wealth Group LLC History No change 2,166 8 0.0% 0.0% 61 0 0.0% Q4 2025 Feb 12, 2026
PNC FINANCIAL SERVICES GROUP, INC. History No change 1,759 7 0.0% 0.0% 62 0 0.0% Q4 2025 Feb 06, 2026
Allworth Financial LP History New 715 2 0.0% 64 +715 New Q4 2025 Feb 05, 2026
BNP PARIBAS FINANCIAL MARKETS History Reduced 511 2 0.0% 0.0% 63 -43 -7.76% Q4 2025 Feb 10, 2026
Russell Investments Group, Ltd. History No change 729 2 0.0% 0.0% 65 0 0.0% Q4 2025 Feb 17, 2026
Bleichroeder LP History No change 595 2 0.0% 0.0% 66 0 0.0% Q4 2025 Feb 13, 2026
Farther Finance Advisors, LLC History New 331 1 0.0% 68 +331 New Q4 2025 Jan 23, 2026
Blue Trust, Inc. History No change 284 1 0.0% 67 0 0.0% Q4 2025 Jan 16, 2026
KINGDON CAPITAL MANAGEMENT, L.L.C. History Closed out 0 0 0.4% -933,332 -100.0% Q3 2025 Nov 14, 2025
BOOTHBAY FUND MANAGEMENT, LLC History Closed out 0 0 0.02% -343,963 -100.0% Q3 2025 Nov 14, 2025
RENAISSANCE TECHNOLOGIES LLC History Closed out 0 0 0.0% -19,177 -100.0% Q3 2025 Nov 13, 2025
TD Waterhouse Canada Inc. History Closed out 0 0 0.0% -1,500 -100.0% Q3 2025 Nov 03, 2025
SBI Securities Co., Ltd. History Reduced 50 0 -166 -76.85% Q4 2025 Feb 03, 2026
Fortitude Family Office, LLC History New 137 0 +137 New Q4 2025 Jan 15, 2026
ROYAL BANK OF CANADA History New 104 0 +104 New Q4 2025 Feb 17, 2026
NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO History New 5 0 +5 New Q4 2025 Feb 10, 2026
JONES FINANCIAL COMPANIES LLLP History No change 38 0 0 0.0% Q4 2025 Feb 17, 2026
NewEdge Advisors, LLC History No change 33 0 0 0.0% Q4 2025 Feb 18, 2026
Rockefeller Capital Management L.P. History No change 33 0 0 0.0% Q4 2025 Mar 16, 2026
HighMark Wealth Management LLC History No change 6 0 0 0.0% Q4 2025 Feb 05, 2026