X4 Pharmaceuticals, Inc - XFOR
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Oct 07, 2026 | SCHEDULE 13G/A | FMR LLC | 4.6% | 4,558,616 | View |
| Oct 07, 2026 | SCHEDULE 13G/A | Abigail P. Johnson | 4.6% | 4,558,616 | View |
| Sep 21, 2026 | SCHEDULE 13G | Venrock Healthcare Capital Partners III, L.P. | 5.6% | 5,555,047 | View |
| Sep 21, 2026 | SCHEDULE 13G | VHCP Co-Investment Holdings III, LLC | 5.6% | 5,555,047 | View |
| Sep 21, 2026 | SCHEDULE 13G | Venrock Healthcare Capital Partners EG, L.P. | 5.6% | 5,555,047 | View |
| Sep 21, 2026 | SCHEDULE 13G | VHCP Management III, LLC | 5.6% | 5,555,047 | View |
| Sep 21, 2026 | SCHEDULE 13G | VHCP Management EG, LLC | 5.6% | 5,555,047 | View |
| Sep 21, 2026 | SCHEDULE 13G | Nimish Shah | 5.6% | 5,555,047 | View |
| Sep 21, 2026 | SCHEDULE 13G | Bong Y. Koh | 5.6% | 5,555,047 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | Perceptive Advisors LLC | 8.1% | 8,085,006 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | Joseph Edelman | 8.1% | 8,085,006 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | Perceptive Life Sciences Master Fund, Ltd. | 8.1% | 8,085,006 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | Deep Track Capital, LP | 8.33% | 8,040,894 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | Deep Track Biotechnology Master Fund, Ltd. | 7.18% | 6,923,680 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | David Kroin | 8.33% | 8,040,894 | View |
| Aug 14, 2026 | SCHEDULE 13G/A | Deep Track Special Opportunities Fund, LP. | 1.16% | 1,117,214 | View |
| Jul 30, 2026 | SCHEDULE 13G | BlackRock, Inc. | 5.9% | 5,529,573 | View |
| May 15, 2026 | SCHEDULE 13G/A | Perceptive Advisors LLC | 7.3% | 6,889,163 | View |
| May 15, 2026 | SCHEDULE 13G/A | Joseph Edelman | 7.3% | 6,889,163 | View |
| May 15, 2026 | SCHEDULE 13G/A | Perceptive Life Sciences Master Fund, Ltd. | 7.3% | 6,889,163 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.