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
Security
X4 Pharmaceuticals, Inc Common Stock, par value $0.001 per share
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
SEC
View on sec.gov

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