Gossamer Bio, Inc. - GOSS
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Nov 06, 2026 | SCHEDULE 13G/A | Opaleye Management Inc. | 6.98% | 426,989 | View |
| Nov 06, 2026 | SCHEDULE 13G/A | Opaleye, L.P. | 6.79% | 415,000 | View |
| Nov 06, 2026 | SCHEDULE 13G/A | James Silverman | 6.98% | 426,989 | View |
| Nov 06, 2026 | SCHEDULE 13G | FMR LLC | 10.9% | 667,465 | View |
| Nov 06, 2026 | SCHEDULE 13G | Abigail P. Johnson | 10.9% | 667,465 | View |
| Oct 29, 2026 | SCHEDULE 13D/A | — | 4.0% | — | View |
| Oct 08, 2026 | SCHEDULE 13D/A | — | 5.9% | — | View |
| Sep 28, 2026 | SCHEDULE 13D/A | — | 4.9% | — | View |
| Aug 24, 2026 | SCHEDULE 13D/A | — | 5.7% | — | View |
| Jul 29, 2026 | SCHEDULE 13G | Opaleye Management Inc. | 5.1% | 24,942,565 | View |
| Jul 29, 2026 | SCHEDULE 13G | Opaleye, L.P. | 4.94% | 24,141,629 | View |
| Jul 29, 2026 | SCHEDULE 13G | James Silverman | 5.1% | 24,942,565 | View |
| Jul 29, 2026 | SCHEDULE 13G/A | BlackRock, Inc. | 1.0% | 4,890,593 | View |
| Jul 24, 2026 | SCHEDULE 13D/A | — | 6.7% | — | View |
| Jul 01, 2026 | SCHEDULE 13D/A | — | 7.8% | — | View |
| Jun 11, 2026 | SCHEDULE 13D | — | 5.0% | — | View |
| Jun 11, 2026 | SCHEDULE 13G | DeepCurrents Investment Group LLC | 7.7% | 37,665,073 | View |
| Jun 11, 2026 | SCHEDULE 13G | DCIG GP LLC | 5.7% | 27,646,139 | View |
| Jun 11, 2026 | SCHEDULE 13G | DCIG Capital Master Fund LP | 5.7% | 27,646,139 | View |
| Jun 11, 2026 | SCHEDULE 13G | Kai Zheng | 7.7% | 37,665,073 | View |
| Jun 11, 2026 | SCHEDULE 13G | 683 Capital Management, LLC | 9.99% | 49,868,571 | View |
| Jun 11, 2026 | SCHEDULE 13G | 683 Capital Partners, LP | 9.99% | 49,868,571 | View |
| Jun 11, 2026 | SCHEDULE 13G | Ari Zweiman | 9.99% | 49,868,571 | View |
| Jun 09, 2026 | SCHEDULE 13G | Context Capital Management, LLC | 9.9% | 48,835,788 | View |
| Jun 09, 2026 | SCHEDULE 13G | Michael S. Rosen | 9.9% | 48,835,788 | View |
| Jun 09, 2026 | SCHEDULE 13G | William D. Fertig | 9.9% | 48,835,788 | View |
| Jun 09, 2026 | SCHEDULE 13G | Charles E. Carnegie | 9.9% | 48,835,788 | View |
| Jun 09, 2026 | SCHEDULE 13G | Context Partners Master Fund, L.P. | 9.9% | 48,835,788 | View |
| May 14, 2026 | SCHEDULE 13G/A | Octagon Capital Advisors LP | 3.8% | 8,976,054 | View |
| May 14, 2026 | SCHEDULE 13G/A | Octagon Investments Master Fund LP | 3.8% | 8,976,054 | View |
| May 14, 2026 | SCHEDULE 13G/A | Ting Jia | 3.8% | 8,976,054 | View |
| 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 |
| 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 |
| Feb 12, 2025 | SCHEDULE 13G/A | Invus Public Equities, L.P. | 2.8% | 6,258,880 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Invus Public Equities Advisors, LLC | 2.8% | 6,258,880 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Invus Global Management, LLC | 2.8% | 6,258,880 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Siren, L.L.C. | 2.8% | 6,258,880 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Avicenna Life Sci Master Fund LP | 0.0% | 0 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Avicenna Life Sci Master GP LLC | 0.0% | 0 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Ulys, L.L.C. | 0.0% | 0 | View |
| Feb 12, 2025 | SCHEDULE 13G/A | Raymond Debbane | 2.8% | 6,258,880 | View |
| Jan 30, 2025 | SCHEDULE 13G/A | The Vanguard Group | 4.42% | 10,034,149 | 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.