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 $491.9M in total; no superinvestor holds it.
13F holders, Q3 2025
Institutional positions in X4 Pharmaceuticals, Inc as of Sep 30, 2025. 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
- 42
- −10 vs. Q2 2025
- Shares held
- 16.2M
- +13.4M (+476.2%) vs. Q2 2025
- Total value
- $55.3M
- +$49.9M (+937.2%) vs. Q2 2025
- New holders
- 11
- 11 more added
- Sold out
- 21
- 10 more reduced
Compare with Q2 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 | $491.9M |
| Q1 2026 | 84 | $407.0M |
| Q4 2025 | 79 | $357.7M |
| Q3 2025 | 42 | $55.3M |
| Q2 2025 | 52 | $5.33M |
| Q1 2025 | 94 | $23.6M |
| Q4 2024 | 90 | $73.3M |
| Q3 2024 | 98 | $67.4M |
| Q2 2024 | 99 | $60.7M |
| Q1 2024 | 98 | $147.1M |
| Q4 2023 | 93 | $87.1M |
| Q3 2023 | 91 | $122.6M |
| Q2 2023 | 96 | $219.2M |
| Q1 2023 | 59 | $53.7M |
| Q4 2022 | 54 | $60.2M |
| Q3 2022 | 59 | $74.0M |
| Q2 2022 | 51 | $16.6M |
| Q1 2022 | 56 | $30.7M |
| Q4 2021 | 52 | $40.4M |
| Q3 2021 | 52 | $85.7M |
| Q2 2021 | 63 | $111.5M |
| Q1 2021 | 61 | $139.0M |
Institutions, Q3 2025
Shares, value and share of portfolio for each institution holding X4 Pharmaceuticals, Inc; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Bain Capital Life Sciences Investors, LLC | 2,436,588 | $8.33M | 0.55% | +1,872,729+332.1% | Added |
| NEA Management Company, LLC | 2,233,743 | $7.64M | 0.42% | +1,734,184+347.1% | Added |
| BVF Inc | 2,233,742 | $7.64M | 0.31% | +2,233,742 | New |
| Nantahala Capital Management, LLC | 2,228,350 | $7.62M | 0.47% | +2,228,350 | New |
| Rosalind Advisors, Inc. | 1,544,607 | $5.28M | 1.87% | +1,544,607 | New |
| Deep Track Capital, LP | 1,122,484 | $3.84M | 0.11% | +1,122,484 | New |
| Stonepine Capital Management, LLC | 1,056,338 | $3.61M | 2.94% | +1,056,338 | New |
| Kingdon Capital Management, L.L.C. | 933,332 | $3.19M | 0.50% | +700,000+300.0% | Added |
| StemPoint Capital LP | 555,411 | $1.90M | 0.38% | +555,411 | New |
| Vanguard Group Inc | 410,485 | $1.40M | 0.00% | +178,593+77.0% | Added |
| Boothbay Fund Management, LLC | 343,963 | $1.18M | 0.03% | +343,963 | New |
| Acorn Capital Advisors, LLC | 273,349 | $934.9K | 0.47% | +119,619+77.8% | Added |
| Pale Fire Capital SE | 180,851 | $618.5K | 0.07% | +120,800+201.2% | Added |
| UBS Group AG | 159,835 | $546.6K | 0.00% | +49,876+45.4% | Added |
| Palumbo Wealth Management LLC | 95,327 | $326.0K | 0.10% | +95,327 | New |
| Geode Capital Management, LLC | 79,658 | $272.5K | 0.00% | +30,512+62.1% | Added |
| Millennium Management LLC | 64,795 | $221.6K | 0.00% | −13,266−17.0% | Reduced |
| BlackRock, Inc. | 61,934 | $211.8K | 0.00% | −117,294−65.4% | Reduced |
| State Street Corp | 38,734 | $132.5K | 0.00% | +23,200+149.3% | Added |
| Point72 Asset Management, L.P. | 21,666 | $74.1K | 0.00% | −10.0% | Reduced |
| Bank of America Corp | 19,304 | $66.0K | 0.00% | −61,012−76.0% | Reduced |
| Renaissance Technologies LLC | 19,177 | $65.6K | 0.00% | +1,811+10.4% | Added |
| Two Sigma Investments, LP | 13,868 | $47.4K | 0.00% | +13,868 | New |
| Tower Research Capital LLC (TRC) | 10,679 | $36.5K | 0.00% | +5,476+105.2% | Added |
| Group One Trading, L.P. | 3,998 | $13.7K | 0.00% | 00.0% | Unchanged |
| Morgan Stanley | 3,728 | $12.8K | 0.00% | −7,196−65.9% | Reduced |
| Point72 Asia (Singapore) Pte. Ltd. | 2,914 | $9.97K | 0.00% | +2,914 | New |
| Royal Bank of Canada | 2,533 | $9.00K | 0.00% | −552−17.9% | Reduced |
| CIBC Private Wealth Group, LLC | 2,166 | $7.41K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 1,759 | $6.02K | 0.00% | −34−1.9% | Reduced |
| TD Waterhouse Canada Inc. | 1,500 | $5.37K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 729 | $2.49K | 0.00% | −8,998−92.5% | Reduced |
| Bleichroeder LP | 595 | $2.04K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 554 | $1.90K | 0.00% | −82−12.9% | Reduced |
| Ronald Blue Trust, Inc. | 284 | $971 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 216 | $739 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 38 | $131 | 0.00% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 33 | $113 | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 33 | $113 | 0.00% | 00.0% | Unchanged |
| Rockefeller Capital Management L.P. | 33 | $113 | 0.00% | +33 | New |
| Citigroup Inc | 32 | $109 | 0.00% | −730−95.8% | Reduced |
| HighMark Wealth Management LLC | 6 | $21 | 0.00% | 00.0% | Unchanged |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −132,724−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −97,344−100.0% | Sold out |
| UBS Oconnor LLC | 0 | $0 | 0.00% | −80,000−100.0% | Sold out |
| Squarepoint Ops LLC | 0 | $0 | 0.00% | −38,982−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −34,821−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −26,382−100.0% | Sold out |
| Goldman Sachs Group Inc | 0 | $0 | 0.00% | −18,864−100.0% | Sold out |
| Virtu Financial LLC | 0 | $0 | 0.00% | −12,587−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −11,261−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −10,548−100.0% | Sold out |
| CWM, LLC | 0 | $0 | 0.00% | −2,414−100.0% | Sold out |
| FMR LLC | 0 | $0 | 0.00% | −1,697−100.0% | Sold out |
| SRS Capital Advisors, Inc. | 0 | $0 | 0.00% | −1,120−100.0% | Sold out |
| Wells Fargo & Company | 0 | $0 | 0.00% | −348−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −149−100.0% | Sold out |
| Nisa Investment Advisors, LLC | 0 | $0 | 0.00% | −139−100.0% | Sold out |
| Raymond James Financial Inc | 0 | $0 | 0.00% | −66−100.0% | Sold out |
| Clearstead Advisors, LLC | 0 | $0 | 0.00% | −64−100.0% | Sold out |
| IFP Advisors, Inc | 0 | $0 | 0.00% | 0 | Sold out |
| EverSource Wealth Advisors, LLC | 0 | $0 | 0.00% | −23−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −3−100.0% | Sold out |