Quick Takeaways
- Octagon Capital Advisors LP filed SCHEDULE 13G/A for Gossamer Bio, Inc. Common Stock, $0.0001 par value (GOSS).
- Disclosed ownership: 6.5%.
- Date of event: 31 Dec 2025.
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
- 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
Quoteable Key Fact
"Octagon Capital Advisors LP disclosed 6.5% ownership in Gossamer Bio, Inc. Common Stock, $0.0001 par value (GOSS) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 05 Feb 2025.
- Current filing was accepted on 17 Feb 2026, 16:02.
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.
Official SEC Source
Backed by Schedule 13D/13G
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
See Original FilingReporting 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 |