114 institutions reported holding $466.6M of X4 PHARMACEUTICALS INC (XFOR) in SEC 13F filings for 2026-06-30. Largest institutional holders: MORGAN STANLEY ($44.2M), FMR LLC ($38.9M), Bain Capital Life Sciences Investors, LLC ($37.2M), PERCEPTIVE ADVISORS LLC ($37.0M), Saturn V Capital Management LP ($32.6M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | MORGAN STANLEY | $44.2M | 9.5M | Trimmed |
| 2 | FMR LLC | $38.9M | 8.3M | Added |
| 3 | Bain Capital Life Sciences Investors, LLC | $37.2M | 8.0M | Hold |
| 4 | PERCEPTIVE ADVISORS LLC | $37.0M | 7.9M | Added |
| 5 | Saturn V Capital Management LP | $32.6M | 7.0M | Added |
| 6 | Empery Asset Management, LP | $32.4M | 6.9M | Trimmed |
| 7 | Deep Track Capital, LP | $27.5M | 5.9M | Trimmed |
| 8 | BlackRock, Inc. | $25.9M | 5.6M | Added |
| 9 | VANGUARD GROUP INC | $22.7M | 4.9M | Added |
| 10 | Kalehua Capital Management LLC | $17.4M | 3.7M | Hold |
| 11 | NEA Management Company, LLC | $15.1M | 3.2M | Hold |
| 12 | Rosalind Advisors, Inc. | $15.0M | 3.2M | Hold |
| 13 | BRAIDWELL LP | $13.6M | 2.9M | Trimmed |
| 14 | Blackstone Inc. | $12.5M | 2.7M | Hold |
| 15 | Trails Edge Capital Partners, LP | $12.0M | 2.6M | Hold |
| 16 | Nantahala Capital Management, LLC | $11.4M | 2.4M | Hold |
| 17 | BVF INC/IL | $10.4M | 2.2M | Hold |
| 18 | GEODE CAPITAL MANAGEMENT, LLC | $9.8M | 2.1M | Added |
| 19 | VR ADVISER, LLC | $9.0M | 1.9M | Added |
| 20 | SAMSARA BIOCAPITAL, LLC | $6.5M | 1.4M | Trimmed |
| 21 | STATE STREET CORP | $6.1M | 1.3M | Added |
| 22 | Woodline Partners LP | $4.7M | 1.0M | Hold |
| 23 | GOLDMAN SACHS GROUP INC | $4.3M | 916,536 | Added |
| 24 | NORTHERN TRUST CORP | $3.0M | 652,849 | Added |
| 25 | Verdad Advisers, LP | $1.6M | 352,093 | New |
Source: SEC Form 13F filings · as of 2026-06-30