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 |
|---|---|---|---|---|---|
| Morgan Stanley | 9,466,992 | $39.1M | 0.00% | +1,258,977+15.3% | Added |
| Empery Asset Management, LP | 8,944,118 | $36.9M | 44.50% | −6,987−0.1% | Reduced |
| FMR LLC | 8,103,400 | $33.5M | 0.00% | −395,700−4.7% | Reduced |
| Bain Capital Life Sciences Investors, LLC | 7,967,454 | $32.9M | 2.97% | 00.0% | Unchanged |
| Perceptive Advisors LLC | 6,737,648 | $27.8M | 0.55% | +423,196+6.7% | Added |
| Saturn V Capital Management LLC | 6,456,646 | $26.7M | 4.83% | +656,116+11.3% | Added |
| Deep Track Capital, LP | 6,339,535 | $26.2M | 0.54% | +1,325,874+26.4% | Added |
| Kalehua Capital Management LLC | 3,722,840 | $15.4M | 10.88% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 3,497,612 | $14.4M | 0.00% | +3,497,612 | New |
| Braidwell LP | 3,272,954 | $13.5M | 0.45% | −95,950−2.8% | Reduced |
| NEA Management Company, LLC | 3,233,743 | $13.4M | 0.76% | 00.0% | Unchanged |
| Rosalind Advisors, Inc. | 3,214,766 | $13.3M | 5.44% | +608,846+23.4% | Added |
| Blackstone Group Inc. | 2,681,922 | $11.1M | 0.05% | 00.0% | Unchanged |
| Trails Edge Capital Partners, LP | 2,571,478 | $10.6M | 2.50% | 00.0% | Unchanged |
| Nantahala Capital Management, LLC | 2,449,468 | $10.1M | 0.63% | 00.0% | Unchanged |
| BVF Inc | 2,233,742 | $9.23M | 0.29% | 00.0% | Unchanged |
| Samsara BioCapital, LLC | 1,832,566 | $7.57M | 0.74% | −127,434−6.5% | Reduced |
| BlackRock, Inc. | 1,211,794 | $5.00M | 0.00% | −15,014−1.2% | Reduced |
| Millennium Management LLC | 1,210,514 | $5.00M | 0.00% | +1,154,536+2,062.5% | Added |
| Woodline Partners LP | 1,001,095 | $4.13M | 0.02% | +2400.0% | Added |
| Geode Capital Management, LLC | 939,726 | $3.88M | 0.00% | −721−0.1% | Reduced |
| Goldman Sachs Group Inc | 882,134 | $3.64M | 0.00% | +50,244+6.0% | Added |
| Susquehanna International Group, LLP | 856,222 | $3.54M | 0.00% | +834,087+3,768.2% | Added |
| StemPoint Capital LP | 850,742 | $3.51M | 0.68% | −47,723−5.3% | Reduced |
| Vanguard Fiduciary Trust Co | 480,733 | $1.99M | 0.00% | +480,733 | New |
| State Street Corp | 403,534 | $1.67M | 0.00% | +205,300+103.6% | Added |
| Marshall Wace, LLP | 336,834 | $1.39M | 0.00% | +256,378+318.7% | Added |
| Stonepine Capital Management, LLC | 335,309 | $1.38M | 1.22% | −258,264−43.5% | Reduced |
| VR Adviser, LLC | 330,525 | $1.37M | 0.05% | +330,525 | New |
| UBS Group AG | 267,340 | $1.10M | 0.00% | +263,211+6,374.7% | Added |
| Acorn Capital Advisors, LLC | 234,039 | $966.6K | 0.27% | −39,310−14.4% | Reduced |
| Qube Research & Technologies Ltd | 218,954 | $904.3K | 0.00% | +151,207+223.2% | Added |
| Northern Trust Corp | 178,235 | $736.1K | 0.00% | 00.0% | Unchanged |
| Pale Fire Capital SE | 167,590 | $692.1K | 0.06% | 00.0% | Unchanged |
| Bank of America Corp | 150,676 | $622.3K | 0.00% | +114,915+321.3% | Added |
| Affinity Asset Advisors, LLC | 145,000 | $598.9K | 0.04% | 00.0% | Unchanged |
| Palumbo Wealth Management LLC | 131,014 | $541.1K | 0.13% | +17,657+15.6% | Added |
| Brevan Howard Capital Management LP | 127,321 | $525.8K | 0.01% | +127,321 | New |
| Susquehanna Portfolio Strategies, LLC | 102,599 | $423.7K | 0.01% | +59,340+137.2% | Added |
| Dynamic Technology Lab Private Ltd | 36,221 | $384.7K | 0.06% | +36,221 | New |
| Charles Schwab Investment Management Inc | 66,749 | $275.7K | 0.00% | −39−0.1% | Reduced |
| Omers Administration Corp | 57,300 | $236.6K | 0.00% | −51,900−47.5% | Reduced |
| Hudson Bay Capital Management LP | 50,287 | $207.7K | 0.00% | +18,048+56.0% | Added |
| Catalyst Funds Management Pty Ltd | 47,383 | $195.7K | 0.03% | +47,383 | New |
| Jane Street Group, LLC | 37,143 | $153.4K | 0.00% | −54,270−59.4% | Reduced |
| Citigroup Inc | 35,765 | $147.7K | 0.00% | +3,433+10.6% | Added |
| Vanguard Global Advisers, LLC | 32,977 | $136.2K | 0.00% | +32,977 | New |
| Diametric Capital, LP | 28,973 | $119.7K | 0.03% | +28,973 | New |
| Stifel Financial Corp | 21,789 | $90.0K | 0.00% | +1,293+6.3% | Added |
| Invesco Ltd. | 19,968 | $82.5K | 0.00% | +19,968 | New |
| Schonfeld Strategic Advisors LLC | 19,514 | $80.6K | 0.00% | +19,514 | New |
| Jefferies Financial Group Inc. | 19,474 | $80.4K | 0.00% | −6,644−25.4% | Reduced |
| Caxton Corp | 15,557 | $64.2K | 1.60% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 14,703 | $60.7K | 0.00% | −64,369−81.4% | Reduced |
| Two Sigma Investments, LP | 13,868 | $57.3K | 0.00% | −3,378−19.6% | Reduced |
| Creative Planning | 13,819 | $57.1K | 0.00% | −2,608−15.9% | Reduced |
| Virtu Financial LLC | 12,730 | $53.0K | 0.00% | −9,759−43.4% | Reduced |
| Jump Financial, LLC | 12,317 | $50.9K | 0.00% | +12,317 | New |
| JustInvest LLC | 11,525 | $47.6K | 0.00% | +11,525 | New |
| SummitTX Capital, L.P. | 11,200 | $46.3K | 0.00% | +11,200 | New |
| Winton Group Ltd | 10,600 | $43.8K | 0.00% | +10,600 | New |
| Indivisible Partners | 10,000 | $37.0K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 4,756 | $19.6K | 0.00% | +4,245+830.7% | Added |
| Barclays PLC | 2,814 | $11.6K | 0.00% | −54,686−95.1% | Reduced |
| Signaturefd, LLC | 1,996 | $8.24K | 0.00% | −758−27.5% | Reduced |
| The PNC Financial Services Group, Inc. | 1,759 | $7.26K | 0.00% | 00.0% | Unchanged |
| State of Wyoming | 1,065 | $4.40K | 0.00% | +1,065 | New |
| Russell Investments Group, Ltd. | 729 | $3.01K | 0.00% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 802 | $3.00K | 0.00% | +802 | New |
| Group One Trading, L.P. | 712 | $2.94K | 0.00% | −3,286−82.2% | Reduced |
| Bleichroeder LP | 595 | $2.46K | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 331 | $1.44K | 0.00% | 00.0% | Unchanged |
| Allworth Financial LP | 310 | $1.28K | 0.00% | −405−56.6% | Reduced |
| Ronald Blue Trust, Inc. | 284 | $1.17K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 180 | $743 | 0.00% | −10,266−98.3% | Reduced |
| Quadrant Capital Group LLC | 128 | $529 | 0.00% | +128 | New |
| Parallel Advisors, LLC | 116 | $479 | 0.00% | +116 | New |
| SBI Securities Co., Ltd. | 54 | $223 | 0.00% | +4+8.0% | Added |
| Jones Financial Companies LLLP | 38 | $154 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 33 | $136 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 33 | $132 | 0.00% | −4,548−99.3% | Reduced |
| HighMark Wealth Management LLC | 6 | $24 | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 5 | $21 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 115 | $0 | 0.00% | +11+10.6% | 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 |