Quick Takeaways
- 683 Capital Management, LLC filed SCHEDULE 13G/A for Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS).
- Disclosed ownership: 3.9%.
- Date of event: 18 Mar 2026.
683 Capital Management, LLC - 18 Mar 2026 SCHEDULE 13G/A Report for Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS)
- Filing Manager
- 683 Capital Management, LLC
- Reporting Manager
- 683 Capital Management, LLC
- Symbol
- GOSS
- Shares outstanding
- 239,264,205 shares
- Disclosed Ownership
- 9,331,304 shares
- Ownership
- 3.9%
- Form type
- SCHEDULE 13G/A
- Filing time
- 24 Mar 2026, 16:48:37 UTC
- Date of event
- 18 Mar 2026
- Previous filing
- 02 Mar 2026
- SEC
- View on sec.gov
Quoteable Key Fact
"683 Capital Management, LLC disclosed 3.9% ownership in Gossamer Bio, Inc. Common Stock, $0.0001 par value per share (GOSS) on 18 Mar 2026."
What Changed
- Previous schedule filing date: 02 Mar 2026.
- Current filing was accepted on 24 Mar 2026, 16:48.
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 |
|---|---|---|---|---|---|---|---|
| 683 Capital Management, LLC | 3.9% | 9,331,304 | 0 | 9,331,304 | Ari Zweiman | Managing Member | |
| 683 Capital Partners, LP | 3.9% | 9,331,304 | 0 | 9,331,304 | Ari Zweiman | Authorized Person | |
| Ari Zweiman | 3.9% | 9,331,304 | 0 | 9,331,304 | Ari Zweiman | Self |