Gossamer Bio, Inc.
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A clinical-stage biopharmaceutical company based in San Diego, Gossamer Bio develops treatments for rare diseases like pulmonary arterial hypertension (PAH), a progressive condition of high blood pressure in the lungs. Its lead drug candidate, seralutinib, is an inhaled dry-powder medicine designed to be breathed directly into the lungs. Founded in 2015, the company takes its name from the gossamer thread, meant to symbolize the fragile yet vital connections it builds with patients and partners.
5.00% Convertible Senior Notes due June 1, 2027
| Holder | Schedule | % of class | Shares | Filed |
|---|---|---|---|---|
| D. E. Shaw & Co., L.L.C. | 13D/AActivist | 6% | 29.13M | Aug 24, 2026 |
| D. E. Shaw & Co., L.P. | 13D/AActivist | 6% | 29.13M | Aug 24, 2026 |
| David E. Shaw | 13D/AActivist | 6% | 29.13M | Aug 24, 2026 |
| D. E. Shaw Valence Portfolios, L.L.C. | 13D/AActivist | 5.7% | 27.70M | Aug 24, 2026 |
| Opaleye Management Inc. | 13GPassive | 5.1% | 24.94M | Jul 29, 2026 |
| James Silverman | 13GPassive | 5.1% | 24.94M | Jul 29, 2026 |
| Opaleye, L.P. | 13GPassive | 4.94% | 24.14M | Jul 29, 2026 |
| BlackRock, Inc. | 13G/APassive | 1% | 4.89M | Jul 29, 2026 |
| 683 Capital Management, LLC | 13GPassive | 9.99% | 49.87M | Jun 11, 2026 |
| 683 Capital Partners, LP | 13GPassive | 9.99% | 49.87M | Jun 11, 2026 |