X4 Pharmaceuticals, Inc
XFOR- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001501697
In the last 90 days, X4 Pharmaceuticals, Inc insiders filed 0 open-market purchases and 3 sales; 89 institutions reported holding it in 13F filings for Q2 2026, worth $463.0M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in X4 Pharmaceuticals, Inc as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 84
- +7 vs. Q4 2025
- Shares held
- 93.9M
- +7.90M (+9.2%) vs. Q4 2025
- Total value
- $388.1M
- +$44.1M (+12.8%) vs. Q4 2025
- New holders
- 18
- 22 more added
- Sold out
- 11
- 23 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting XFOR on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 89 | $463.0M |
| Q1 2026 | 84 | $388.1M |
| Q4 2025 | 79 | $357.7M |
| Q3 2025 | 42 | $55.3M |
| Q2 2025 | 52 | $5.33M |
| Q1 2025 | 94 | $23.3M |
| Q4 2024 | 90 | $73.2M |
| Q3 2024 | 98 | $67.3M |
| Q2 2024 | 99 | $58.9M |
| Q1 2024 | 98 | $143.2M |
| Q4 2023 | 93 | $81.2M |
| Q3 2023 | 91 | $122.6M |
| Q2 2023 | 96 | $219.1M |
| Q1 2023 | 59 | $53.6M |
| Q4 2022 | 54 | $60.2M |
| Q3 2022 | 59 | $66.9M |
| Q2 2022 | 51 | $15.5M |
| Q1 2022 | 56 | $28.6M |
| Q4 2021 | 52 | $40.2M |
| Q3 2021 | 52 | $85.7M |
| Q2 2021 | 63 | $107.8M |
| Q1 2021 | 61 | $138.7M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding X4 Pharmaceuticals, Inc; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Royal Bank of Canada | 115 | $0 | 0.00% | +11+10.6% | Added |
| Northwestern Mutual Wealth Management Co | 5 | $21 | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 6 | $24 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 33 | $132 | 0.00% | −4,548−99.3% | Reduced |
| Rockefeller Capital Management L.P. | 33 | $136 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 38 | $154 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 54 | $223 | 0.00% | +4+8.0% | Added |
| Parallel Advisors, LLC | 116 | $479 | 0.00% | +116 | New |
| Quadrant Capital Group LLC | 128 | $529 | 0.00% | +128 | New |
| Tower Research Capital LLC (TRC) | 180 | $743 | 0.00% | −10,266−98.3% | Reduced |
| Ronald Blue Trust, Inc. | 284 | $1.17K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 310 | $1.28K | 0.00% | −405−56.6% | Reduced |
| Farther Finance Advisors, LLC | 331 | $1.44K | 0.00% | 00.0% | Unchanged |
| Bleichroeder LP | 595 | $2.46K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 712 | $2.94K | 0.00% | −3,286−82.2% | Reduced |
| Acadian Asset Management LLC | 802 | $3.00K | 0.00% | +802 | New |
| Russell Investments Group, Ltd. | 729 | $3.01K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 1,065 | $4.40K | 0.00% | +1,065 | New |
| The PNC Financial Services Group, Inc. | 1,759 | $7.26K | 0.00% | 00.0% | Unchanged |
| Signaturefd, LLC | 1,996 | $8.24K | 0.00% | −758−27.5% | Reduced |
| Barclays PLC | 2,814 | $11.6K | 0.00% | −54,686−95.1% | Reduced |
| BNP Paribas Arbitrage, SA | 4,756 | $19.6K | 0.00% | +4,245+830.7% | Added |
| Indivisible Partners | 10,000 | $37.0K | 0.00% | 00.0% | Unchanged |
| Winton Group Ltd | 10,600 | $43.8K | 0.00% | +10,600 | New |
| SummitTX Capital, L.P. | 11,200 | $46.3K | 0.00% | +11,200 | New |
| JustInvest LLC | 11,525 | $47.6K | 0.00% | +11,525 | New |
| Jump Financial, LLC | 12,317 | $50.9K | 0.00% | +12,317 | New |
| Virtu Financial LLC | 12,730 | $53.0K | 0.00% | −9,759−43.4% | Reduced |
| Creative Planning | 13,819 | $57.1K | 0.00% | −2,608−15.9% | Reduced |
| Two Sigma Investments, LP | 13,868 | $57.3K | 0.00% | −3,378−19.6% | Reduced |
| ExodusPoint Capital Management, LP | 14,703 | $60.7K | 0.00% | −64,369−81.4% | Reduced |
| Caxton Corp | 15,557 | $64.2K | 1.60% | 00.0% | Unchanged |
| Jefferies Financial Group Inc. | 19,474 | $80.4K | 0.00% | −6,644−25.4% | Reduced |
| Schonfeld Strategic Advisors LLC | 19,514 | $80.6K | 0.00% | +19,514 | New |
| Invesco Ltd. | 19,968 | $82.5K | 0.00% | +19,968 | New |
| Stifel Financial Corp | 21,789 | $90.0K | 0.00% | +1,293+6.3% | Added |
| Diametric Capital, LP | 28,973 | $119.7K | 0.03% | +28,973 | New |
| Vanguard Global Advisers, LLC | 32,977 | $136.2K | 0.00% | +32,977 | New |
| Citigroup Inc | 35,765 | $147.7K | 0.00% | +3,433+10.6% | Added |
| Jane Street Group, LLC | 37,143 | $153.4K | 0.00% | −54,270−59.4% | Reduced |
| Catalyst Funds Management Pty Ltd | 47,383 | $195.7K | 0.03% | +47,383 | New |
| Hudson Bay Capital Management LP | 50,287 | $207.7K | 0.00% | +18,048+56.0% | Added |
| Omers Administration Corp | 57,300 | $236.6K | 0.00% | −51,900−47.5% | Reduced |
| Charles Schwab Investment Management Inc | 66,749 | $275.7K | 0.00% | −39−0.1% | Reduced |
| Dynamic Technology Lab Private Ltd | 36,221 | $384.7K | 0.06% | +36,221 | New |
| Susquehanna Portfolio Strategies, LLC | 102,599 | $423.7K | 0.01% | +59,340+137.2% | Added |
| Brevan Howard Capital Management LP | 127,321 | $525.8K | 0.01% | +127,321 | New |
| Palumbo Wealth Management LLC | 131,014 | $541.1K | 0.13% | +17,657+15.6% | Added |
| Affinity Asset Advisors, LLC | 145,000 | $598.9K | 0.04% | 00.0% | Unchanged |
| Bank of America Corp | 150,676 | $622.3K | 0.00% | +114,915+321.3% | Added |
| Pale Fire Capital SE | 167,590 | $692.1K | 0.06% | 00.0% | Unchanged |
| Northern Trust Corp | 178,235 | $736.1K | 0.00% | 00.0% | Unchanged |
| Qube Research & Technologies Ltd | 218,954 | $904.3K | 0.00% | +151,207+223.2% | Added |
| Acorn Capital Advisors, LLC | 234,039 | $966.6K | 0.27% | −39,310−14.4% | Reduced |
| UBS Group AG | 267,340 | $1.10M | 0.00% | +263,211+6,374.7% | Added |
| VR Adviser, LLC | 330,525 | $1.37M | 0.05% | +330,525 | New |
| Stonepine Capital Management, LLC | 335,309 | $1.38M | 1.22% | −258,264−43.5% | Reduced |
| Marshall Wace, LLP | 336,834 | $1.39M | 0.00% | +256,378+318.7% | Added |
| State Street Corp | 403,534 | $1.67M | 0.00% | +205,300+103.6% | Added |
| Vanguard Fiduciary Trust Co | 480,733 | $1.99M | 0.00% | +480,733 | New |
| StemPoint Capital LP | 850,742 | $3.51M | 0.68% | −47,723−5.3% | Reduced |
| Susquehanna International Group, LLP | 856,222 | $3.54M | 0.00% | +834,087+3,768.2% | Added |
| Goldman Sachs Group Inc | 882,134 | $3.64M | 0.00% | +50,244+6.0% | Added |
| Geode Capital Management, LLC | 939,726 | $3.88M | 0.00% | −721−0.1% | Reduced |
| Woodline Partners LP | 1,001,095 | $4.13M | 0.02% | +2400.0% | Added |
| Millennium Management LLC | 1,210,514 | $5.00M | 0.00% | +1,154,536+2,062.5% | Added |
| BlackRock, Inc. | 1,211,794 | $5.00M | 0.00% | −15,014−1.2% | Reduced |
| Samsara BioCapital, LLC | 1,832,566 | $7.57M | 0.74% | −127,434−6.5% | Reduced |
| BVF Inc | 2,233,742 | $9.23M | 0.29% | 00.0% | Unchanged |
| Nantahala Capital Management, LLC | 2,449,468 | $10.1M | 0.63% | 00.0% | Unchanged |
| Trails Edge Capital Partners, LP | 2,571,478 | $10.6M | 2.50% | 00.0% | Unchanged |
| Blackstone Group Inc. | 2,681,922 | $11.1M | 0.05% | 00.0% | Unchanged |
| Rosalind Advisors, Inc. | 3,214,766 | $13.3M | 5.44% | +608,846+23.4% | Added |
| NEA Management Company, LLC | 3,233,743 | $13.4M | 0.76% | 00.0% | Unchanged |
| Braidwell LP | 3,272,954 | $13.5M | 0.45% | −95,950−2.8% | Reduced |
| Vanguard Capital Management LLC | 3,497,612 | $14.4M | 0.00% | +3,497,612 | New |
| Kalehua Capital Management LLC | 3,722,840 | $15.4M | 10.88% | 00.0% | Unchanged |
| Deep Track Capital, LP | 6,339,535 | $26.2M | 0.54% | +1,325,874+26.4% | Added |
| Saturn V Capital Management LLC | 6,456,646 | $26.7M | 4.83% | +656,116+11.3% | Added |
| Perceptive Advisors LLC | 6,737,648 | $27.8M | 0.55% | +423,196+6.7% | Added |
| Bain Capital Life Sciences Investors, LLC | 7,967,454 | $32.9M | 2.97% | 00.0% | Unchanged |
| FMR LLC | 8,103,400 | $33.5M | 0.00% | −395,700−4.7% | Reduced |
| Empery Asset Management, LP | 8,944,118 | $36.9M | 44.50% | −6,987−0.1% | Reduced |
| Morgan Stanley | 9,466,992 | $39.1M | 0.00% | +1,258,977+15.3% | Added |
| Siren, L.L.C. | 0 | $0 | 0.00% | −1,500,000−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −808,154−100.0% | Sold out |
| Silverarc Capital Management, LLC | 0 | $0 | 0.00% | −357,387−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −128,675−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −64,505−100.0% | Sold out |
| Man Group plc | 0 | $0 | 0.00% | −24,187−100.0% | Sold out |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −22,200−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −12,518−100.0% | Sold out |
| Fortitude Family Office, LLC | 0 | $0 | 0.00% | −137−100.0% | Sold out |
| GWM Advisors LLC | 0 | $0 | 0.00% | −33−100.0% | Sold out |
| RMG Wealth Management LLC | 0 | $0 | 0.00% | −28−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| CIBC Private Wealth Group, LLC | – | – | – | – | Not filed |