Schedule 13G ownership disclosure

Gossamer Bio Inc

Common Stock, $0.0001 par value per share · CUSIP: 38341P102

Event date: 2026-02-23

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares
Unavailable
Percent of class
Unavailable
  • 683 Capital Management, LLC

    Shares: 12,331,304 · Class: 5.23%

  • 683 Capital Partners, LP

    Shares: 12,331,304 · Class: 5.23%

  • Ari Zweiman

    Shares: 12,331,304 · Class: 5.23%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.

Source: SEC EDGAR filing

Filing metadata

Accession number
0001404574-26-000006
Form type
SCHEDULE 13G
Filer
683 Capital Management, LLC
CIK
CIK 1404574
Filed
Mar 02, 2026
Reporting period
Feb 23, 2026
Description
Schedule 13G beneficial ownership

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