7 insiders reported 13 Form 4 transactions for Gossamer Bio, Inc. (GOSS) over the past 18 months (most recent 2026-01-05). Recent activity: Giraudo Bryan (COO/CFO) Buy 115,750 shares, Hasnain Faheem (President & CEO) Buy 280,000 shares, Aranda Richard (Chief Medical Officer) Buy 93,750 shares, Peterson Caryn (EVP, Regulatory Affairs) Buy 84,500 shares, Christian Waage (EVP, Tech Ops and Admin) Buy 84,500 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-05 | Giraudo Bryan | COO/CFO | Buy | 115,750 | $0 |
| 2026-01-05 | Hasnain Faheem | President & CEO | Buy | 280,000 | $0 |
| 2026-01-05 | Aranda Richard | Chief Medical Officer | Buy | 93,750 | $0 |
| 2026-01-05 | Peterson Caryn | EVP, Regulatory Affairs | Buy | 84,500 | $0 |
| 2026-01-05 | Christian Waage | EVP, Tech Ops and Admin | Buy | 84,500 | $0 |
| 2026-01-05 | Smith Robert Paul JR | Chief Commercial Officer | Buy | 93,750 | $0 |
| 2025-10-02 | Smith Robert Paul JR | Chief Commercial Officer | Buy | 162,500 | $0 |
| 2025-10-02 | Giraudo Bryan | COO/CFO | Buy | 181,250 | $0 |
| 2025-10-02 | Peterson Caryn | EVP, Regulatory Affairs | Buy | 125,000 | $0 |
| 2025-10-02 | Aranda Richard | Chief Medical Officer | Buy | 162,500 | $0 |
| 2025-10-02 | Hasnain Faheem | President & CEO | Buy | 437,500 | $0 |
| 2025-10-02 | Christian Waage | EVP, Tech Ops and Admin | Buy | 125,000 | $0 |
| 2025-08-20 | Milligan Sandra | Director | Buy | 26,050 | $50,016 |
Source: SEC Form 4 filings · as of 2026-01-05