Octagon Capital Advisors LP - 31 Dec 2025 SCHEDULE 13G/A Report for Gossamer Bio, Inc. Common Stock, $0.0001 par value (GOSS)

Filing Manager
Octagon Capital Advisors LP
Reporting Manager
Octagon Capital Advisors LP
Security
Gossamer Bio, Inc. Common Stock, $0.0001 par value
Symbol
GOSS
Shares outstanding
232,945,000 shares
Disclosed Ownership
15,141,425 shares
Ownership
6.5%
Form type
SCHEDULE 13G/A
Filing time
17 Feb 2026, 16:02:17 UTC
Date of event
31 Dec 2025
Previous filing
05 Feb 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Octagon Capital Advisors LP 6.5% 15,141,425 0 15,141,425 /s/ Ting Jia Managing Member
Octagon Investments Master Fund LP 6.5% 15,141,425 0 15,141,425 /s/ Ting Jia Managing Member, Octagon Investments GP, LLC, its general partner
Ting Jia 6.5% 15,141,425 0 15,141,425 /s/ Ting Jia Ting Jia