BIOTECHNOLOGY VALUE FUND L P - 22 Oct 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
171,568,627 shares
Disclosed Ownership
8,750,000 shares
Ownership
5.1%
Form type
SCHEDULE 13G
Filing time
29 Oct 2025, 17:24:59 UTC
Date of event
22 Oct 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% 4,673,550 0 4,673,550 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF I GP LLC 2.7% 4,673,550 0 4,673,550 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BIOTECHNOLOGY VALUE FUND II LP 2% 3,396,894 0 3,396,894 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF II GP LLC 2% 3,396,894 0 3,396,894 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
Biotechnology Value Trading Fund OS LP 0.3% 542,486 0 542,486 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF Partners OS Ltd. 0.3% 542,486 0 542,486 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF GP HOLDINGS LLC 4.7% 8,070,444 0 8,070,444 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF PARTNERS L P/IL 5.1% 8,750,000 0 8,750,000 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
BVF INC/IL 5.1% 8,750,000 0 8,750,000 /s/ Mark N. Lampert Mark N. Lampert, Authorized Signatory
LAMPERT MARK N 5.1% 8,750,000 0 8,750,000 /s/ Mark N. Lampert Mark N. Lampert