Biotechnology Value Fund L P - Oct 22, 2025 SCHEDULE 13G Report for Compass Therapeutics, Inc. Common Stock, $0.0001 par value per share (CMPX)

Filing Manager
BIOTECHNOLOGY VALUE FUND L P
Reporting Manager
BVF PARTNERS L P/IL
Security
Compass Therapeutics, Inc. Common Stock, $0.0001 par value per share
Symbol
CMPX
Shares outstanding
172M shares
Disclosed Ownership
8.75M shares
Ownership
5.1%
Form type
SCHEDULE 13G
Date filed
10/29/2025, 05:24 PM
Date of event
Oct 22, 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 2.7% 4.67M 0 4.67M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF I GP LLC 2.7% 4.67M 0 4.67M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BIOTECHNOLOGY VALUE FUND II LP 2% 3.4M 0 3.4M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF II GP LLC 2% 3.4M 0 3.4M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
Biotechnology Value Trading Fund OS LP 0.3% 542K 0 542K /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF Partners OS Ltd. 0.3% 542K 0 542K /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF GP HOLDINGS LLC 4.7% 8.07M 0 8.07M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF PARTNERS L P/IL 5.1% 8.75M 0 8.75M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF INC/IL 5.1% 8.75M 0 8.75M /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
LAMPERT MARK N 5.1% 8.75M 0 8.75M /s/ Mark N. Lampert Mark N. Lampert