Gossamer Bio, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Smith Robert Paul JR | Chief Commercial Officer | Award / Grant | 162,500 | — | — | 162,500 | Oct 1, 2025 |
| Christian Waage | EVP, Tech Ops and Admin | Award / Grant | 125,000 | — | — | 710,934 | Oct 1, 2025 |
| Giraudo Bryan | COO/CFO | Award / Grant | 181,250 | — | — | 273,987 | Oct 1, 2025 |
| Aranda Richard | Chief Medical Officer | Award / Grant | 162,500 | — | — | 369,356 | Oct 1, 2025 |
| Hasnain Faheem | President & CEO | Award / Grant | 437,500 | — | — | 557,793 | Oct 1, 2025 |
| Peterson Caryn | EVP, Regulatory Affairs | Award / Grant | 125,000 | — | — | 174,833 | Oct 1, 2025 |
| Milligan Sandra | — | Purchase | 26,050 | $1.92 | $50,016 | 58,050 | Aug 19, 2025 |
| Aranda Richard | Chief Medical Officer | Sale | 1,908 | $0.66 | $1,259 | 196,891 | Jun 24, 2024 |
| Hasnain Faheem | President & CEO | Purchase | 372,000 | $0.67 | $249,240 | 5,408,073 | Jun 21, 2024 |
| Giraudo Bryan | COO/CFO | Purchase | 100,000 | $0.59 | $59,000 | 480,010 | Jun 18, 2024 |
| Smith Robert Paul JR | Chief Commercial Officer | Purchase | 25,000 | $0.60 | $15,000 | 25,000 | Jun 17, 2024 |
| Christian Waage | EVP, Tech Ops and Admin | Sale | 6,430 | $1.16 | $7,459 | 585,934 | Mar 27, 2024 |
| Giraudo Bryan | COO/CFO | Sale | 6,430 | $1.16 | $7,459 | 92,737 | Mar 27, 2024 |
| Hasnain Faheem | President & CEO | Sale | 23,172 | $1.16 | $26,880 | 120,293 | Mar 27, 2024 |
| Aranda Richard | Chief Medical Officer | Sale | 4,018 | $1.33 | $5,344 | 198,799 | Mar 18, 2024 |
| Peterson Caryn | EVP, Regulatory Affairs | Sale | 4,018 | $1.33 | $5,344 | 49,833 | Mar 18, 2024 |
| Milligan Sandra | — | Purchase | 32,000 | $0.79 | $25,280 | 32,000 | Nov 15, 2023 |
| Giraudo Bryan | COO/CFO | Purchase | 200,000 | $0.56 | $112,000 | 380,010 | Nov 13, 2023 |
| Giraudo Bryan | COO/CFO | Award / Grant | 54,020 | $1.82 | $98,316 | 180,010 | Jul 24, 2023 |
| Hasnain Faheem | President & CEO | Award / Grant | 540,176 | $1.82 | $983,120 | 5,036,073 | Jul 24, 2023 |
| Christian Waage | EVP, Tech Ops and Admin | Award / Grant | 13,504 | $1.82 | $24,577 | 45,892 | Jul 24, 2023 |
| Aranda Richard | Chief Medical Officer | Sale | 1,814 | $1.29 | $2,340 | 197,574 | Jun 22, 2023 |
| Giraudo Bryan | COO/CFO | Purchase | 55,000 | $1.02 | $56,100 | 125,990 | Apr 4, 2023 |
| Hasnain Faheem | President & CEO | Purchase | 440,500 | $1.14 | $502,170 | 4,495,897 | Mar 21, 2023 |
| Christian Waage | EVP, Tech Ops and Admin | Purchase | 18,500 | $1.20 | $22,200 | 32,388 | Mar 20, 2023 |
| Giraudo Bryan | COO/CFO | Purchase | 50,000 | $0.97 | $48,500 | 70,990 | Mar 20, 2023 |
| Carter Laura | Chief Scientific Officer | Sale | 6,029 | $1.10 | $6,632 | 76,263 | Mar 16, 2023 |
| Aranda Richard | Chief Medical Officer | Sale | 7,563 | $1.10 | $8,319 | 199,388 | Mar 16, 2023 |
| Peterson Caryn | EVP, Regulatory Affairs | Sale | 7,564 | $1.10 | $8,320 | 53,851 | Mar 16, 2023 |
| Carter Laura | Chief Scientific Officer | Sale | 4,876 | $12.07 | $58,853 | 82,292 | Oct 24, 2022 |
| Peterson Caryn | EVP, Regulatory Affairs | Sale | 4,757 | $12.07 | $57,417 | 61,415 | Oct 24, 2022 |
| Carter Laura | Chief Scientific Officer | Sale | 4,876 | $12.07 | $58,853 | 82,292 | Oct 24, 2022 |
| Aranda Richard | Chief Medical Officer | Sale | 4,757 | $12.07 | $57,417 | 205,430 | Oct 24, 2022 |
| Carter Laura | Chief Scientific Officer | Purchase | 6,934 | $7.21 | $49,994 | 87,168 | Jul 15, 2022 |
| Christian Waage | EVP, Tech Ops and Admin | Purchase | 6,934 | $7.21 | $49,994 | 13,888 | Jul 15, 2022 |
| Giraudo Bryan | COO/CFO | Purchase | 13,869 | $7.21 | $99,995 | 20,990 | Jul 15, 2022 |
| Hasnain Faheem | President & CEO | Purchase | 138,696 | $7.21 | $999,998 | 3,617,325 | Jul 15, 2022 |
| Carter Laura | Chief Scientific Officer | Sale | 8,808 | $8.25 | $72,666 | 80,234 | Jul 1, 2022 |
| Aranda Richard | Chief Medical Officer | Sale | 1,778 | $6.88 | $12,233 | 209,897 | Jun 22, 2022 |
| Carter Laura | Chief Scientific Officer | Sale | 1,262 | $7.20 | $9,086 | 89,042 | May 4, 2022 |
| Christian Waage | EVP, Tech Ops and Admin | Sale | 10,722 | $8.92 | $95,640 | 579,008 | Mar 23, 2022 |
| Hasnain Faheem | President & CEO | Sale | 19,035 | $8.92 | $169,792 | 143,465 | Mar 23, 2022 |
| Giraudo Bryan | COO/CFO | Sale | 10,722 | $8.92 | $95,640 | 99,167 | Mar 23, 2022 |
| Carter Laura | Chief Scientific Officer | Sale | 5,002 | $8.28 | $41,417 | 90,304 | Mar 16, 2022 |
| Peterson Caryn | EVP, Regulatory Affairs | Sale | 6,279 | $8.28 | $51,990 | 66,172 | Mar 16, 2022 |
| Aranda Richard | Chief Medical Officer | Sale | 6,278 | $8.28 | $51,982 | 211,675 | Mar 16, 2022 |
| Peterson Caryn | EVP, Regulatory Affairs | Sale | 2,377 | $12.25 | $29,118 | 72,451 | Oct 25, 2021 |
| Carter Laura | Chief Scientific Officer | Sale | 2,377 | $12.25 | $29,118 | 95,306 | Oct 25, 2021 |
| Aranda Richard | Chief Medical Officer | Sale | 2,377 | $12.25 | $29,118 | 217,432 | Oct 25, 2021 |
| Carter Laura | Chief Scientific Officer | Award / Grant | 25,000 | — | — | 97,683 | Jun 30, 2021 |