List of insiders holdings for Gossamer Bio Inc.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | Hasnain Faheem President & CEO | 2026-03-20 16:17:44 | 7,124,500 0 | 7,124,500 | Form 4 |
| 2 | Gujrathi Sheila President & CEO | 2020-02-19 16:18:41 | 481,500 4,048,242 | 4,529,742 | Form 4 |
| 3 | Giraudo Bryan COO/CFO | 2026-03-20 16:16:53 | 2,960,751 0 | 2,960,751 | Form 4 |
| 4 | Aranda Richard Chief Medical Officer | 2026-03-20 16:22:00 | 2,348,118 0 | 2,348,118 | Form 4 |
| 5 | Christian Waage EVP, Tech Ops and Admin | 2026-03-20 16:14:30 | 2,065,584 0 | 2,065,584 | Form 4 |
| 6 | Peterson Caryn EVP, Regulatory Affairs | 2026-03-20 16:20:55 | 1,992,203 0 | 1,992,203 | Form 4 |
| 7 | Smith Robert Paul JR Chief Commercial Officer | 2026-03-20 16:19:57 | 1,134,500 0 | 1,134,500 | Form 4 |
| 8 | Salter-Cid Luisa Chief Scientific Officer | 2021-03-25 16:13:54 | 206,065 0 | 206,065 | Form 4 |
| 9 | Carter Laura Chief Scientific Officer | 2023-03-22 17:23:30 | 157,500 0 | 157,500 | Form 4 |
| 10 | Dupont Jakob Chief Medical Officer | 2020-02-19 16:23:49 | 118,000 0 | 118,000 | Form 4 |
| 11 | Quisel John D Director | 2025-06-26 16:37:32 | 115,000 0 | 115,000 | Form 4 |
| 12 | Daniel Thomas O Director | 2025-06-26 16:40:29 | 115,000 0 | 115,000 | Form 4 |
| 13 | Nathan Steven D Director | 2025-06-26 16:39:13 | 115,000 0 | 115,000 | Form 4 |
| 14 | Cox Russell J. Director | 2025-06-26 16:38:29 | 115,000 0 | 115,000 | Form 4 |
| 15 | Drynan Skye Director | 2025-06-26 16:35:45 | 115,000 0 | 115,000 | Form 4 |
| 16 | Milligan Sandra Director | 2025-08-20 16:04:35 | 58,050 0 | 58,050 | Form 4 |
| 17 | GALA RENEE D Director | 2023-06-09 16:15:57 | 35,000 0 | 35,000 | Form 4 |
| 18 | Burow Kristina Director | 2023-06-09 16:13:20 | 35,000 0 | 35,000 | Form 4 |
| 19 | Bilenker Joshua H. Director | 2022-07-15 17:05:45 | 30,000 0 | 30,000 | Form 4 |
| 20 | ARCH Venture Partners IX LLC ARCH Venture Fund IX Overage L.P. ARCH Venture Partners IX Overage L.P. ARCH Venture Fund IX L.P. ARCH Venture Partners IX L.P. NELSEN ROBERT CRANDELL KEITH BYBEE CLINTON 10% Owner | 2024-02-09 17:35:11 | 0 0 | 0 | Form 13G |
| 21 | Omega Fund V L.P. Omega Fund V GP L.P. Omega Fund V GP Manager Ltd. 10% Owner | 2021-02-12 12:59:59 | 0 0 | 0 | Form 13G |
| 22 | Omega Fund V L.P. Omega Fund V GP L.P. Omega Fund V GP Manager Ltd. Stampacchia Otello 10% Owner | 2021-02-12 12:59:59 | 0 0 | 0 | Form 13G |