Quick Takeaways
- BIOTECHNOLOGY VALUE FUND L P filed SCHEDULE 13G for X4 Pharmaceuticals, Inc Common Stock, par value $0.001 per share (XFOR).
- Disclosed ownership: 9.9%.
- Date of event: 13 Aug 2025.
BIOTECHNOLOGY VALUE FUND L P - 13 Aug 2025 SCHEDULE 13G Report for X4 Pharmaceuticals, Inc Common Stock, par value $0.001 per share (XFOR)
- Filing Manager
- BIOTECHNOLOGY VALUE FUND L P
- Reporting Manager
- BVF PARTNERS L P/IL
- Symbol
- XFOR
- Shares outstanding
- 22,663,222 shares
- Disclosed Ownership
- 2,243,659 shares
- Ownership
- 9.9%
- Form type
- SCHEDULE 13G
- Filing time
- 20 Aug 2025, 17:41:30 UTC
- Date of event
- 13 Aug 2025
- Next filing
- 17 Feb 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"BIOTECHNOLOGY VALUE FUND L P disclosed 9.9% ownership in X4 Pharmaceuticals, Inc Common Stock, par value $0.001 per share (XFOR) on 13 Aug 2025."
What Changed
- No earlier schedule filing is available for direct comparison.
- Current filing was accepted on 20 Aug 2025, 17:41.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (10)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| BIOTECHNOLOGY VALUE FUND L P | 5.2% | 1,168,649 | 0 | 1,168,649 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BVF I GP LLC | 5.2% | 1,168,649 | 0 | 1,168,649 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BIOTECHNOLOGY VALUE FUND II LP | 4% | 906,855 | 0 | 906,855 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BVF II GP LLC | 4% | 906,855 | 0 | 906,855 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| Biotechnology Value Trading Fund OS LP | 0.6% | 123,369 | 0 | 123,369 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BVF Partners OS Ltd. | 0.6% | 123,369 | 0 | 123,369 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BVF GP HOLDINGS LLC | 9.2% | 2,075,504 | 0 | 2,075,504 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BVF PARTNERS L P/IL | 9.9% | 2,243,659 | 0 | 2,243,659 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| BVF INC/IL | 9.9% | 2,243,659 | 0 | 2,243,659 | /s/ Mark N. Lampert | Mark N. Lampert, Authorized Signatory | |
| LAMPERT MARK N | 9.9% | 2,243,659 | 0 | 2,243,659 | /s/ Mark N. Lampert | Mark N. Lampert |