Gossamer Bio, Inc. - GOSS
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Mar 27, 2026 | SCHEDULE 13G/A | The Vanguard Group | 0.0% | 0 | View |
| Mar 24, 2026 | SCHEDULE 13G/A | 683 Capital Management, LLC | 3.9% | 9,331,304 | View |
| Mar 24, 2026 | SCHEDULE 13G/A | 683 Capital Partners, LP | 3.9% | 9,331,304 | View |
| Mar 24, 2026 | SCHEDULE 13G/A | Ari Zweiman | 3.9% | 9,331,304 | View |
| Mar 02, 2026 | SCHEDULE 13G | 683 Capital Management, LLC | 5.23% | 12,331,304 | View |
| Mar 02, 2026 | SCHEDULE 13G | 683 Capital Partners, LP | 5.23% | 12,331,304 | View |
| Mar 02, 2026 | SCHEDULE 13G | Ari Zweiman | 5.23% | 12,331,304 | View |
| Feb 24, 2026 | SCHEDULE 13D/A | — | — | — | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Octagon Capital Advisors LP | 6.5% | 15,141,425 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Octagon Investments Master Fund LP | 6.5% | 15,141,425 | View |
| Feb 17, 2026 | SCHEDULE 13G/A | Ting Jia | 6.5% | 15,141,425 | View |
| Jan 21, 2026 | SCHEDULE 13G/A | BlackRock, Inc. | 6.5% | 15,065,708 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.