Gossamer Bio Inc (GOSS)
Insider transactions
A complete record of Form 4 filings tracking every share acquisition and disposal by executives, directors, and senior officers. Filterable by date range and transaction type, the table exposes the direct market actions of those with the deepest knowledge of a company's operations — providing a factual, data-driven signal of internal conviction that complements traditional fundamental and technical analysis.
Transaction date | Executive | Executive Title | Security Type | Acquisition / Disposal | Shares | Share price |
|---|---|---|---|---|---|---|
| Sep 23, 2026 | DANIEL, THOMAS O | Director | Stock Option (Right to Buy) | Acquisition | 10,000 | $0 |
| Sep 23, 2026 | COX, RUSSELL J. | Director | Stock Option (Right to Buy) | Acquisition | 10,000 | $0 |
| Sep 23, 2026 | CIONGOLI, GREGORY AUSTIN | Director | Stock Option (Right to Buy) | Acquisition | 30,000 | $0 |
| Sep 23, 2026 | QUISEL, JOHN D | Director | Stock Option (Right to Buy) | Acquisition | 10,000 | $0 |
| Sep 23, 2026 | MILLIGAN, SANDRA | Director | Stock Option (Right to Buy) | Acquisition | 10,000 | $0 |
| Sep 23, 2026 | DRYNAN, SKYE | Director | Stock Option (Right to Buy) | Acquisition | 10,000 | $0 |
| Sep 23, 2026 | NATHAN, STEVEN D | Director | Stock Option (Right to Buy) | Acquisition | 10,000 | $0 |
| Aug 24, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 5,800,051 | $0 |
| Aug 24, 2026 | PETERSON, CARYN | Chief Development Officer | Stock Option (Right to Buy) | Acquisition | 5,800,051 | $0 |
| Aug 24, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 5,800,051 | $0 |
| Aug 24, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Pre-Funded Warrant (Right to Buy) | Acquisition | 166 | $1,000.00 |
| Aug 24, 2026 | GIRAUDO, BRYAN | COO/CFO | Pre-Funded Warrant (Right to Buy) | Acquisition | 25 | $1,000.00 |
| Aug 24, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Stock Option (Right to Buy) | Acquisition | 5,800,051 | $0 |
| Aug 24, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 2,900,026 | $0 |
| Jun 4, 2026 | NATHAN, STEVEN D | Director | Stock Option (Right to Buy) | Acquisition | 115,000 | $0 |
| Jun 4, 2026 | MILLIGAN, SANDRA | Director | Stock Option (Right to Buy) | Acquisition | 115,000 | $0 |
| Jun 4, 2026 | DRYNAN, SKYE | Director | Stock Option (Right to Buy) | Acquisition | 115,000 | $0 |
| Jun 4, 2026 | QUISEL, JOHN D | Director | Stock Option (Right to Buy) | Acquisition | 115,000 | $0 |
| Jun 4, 2026 | DANIEL, THOMAS O | Director | Stock Option (Right to Buy) | Acquisition | 115,000 | $0 |
| Jun 4, 2026 | COX, RUSSELL J. | Director | Stock Option (Right to Buy) | Acquisition | 115,000 | $0 |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 1,680,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 9,167 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 21,167 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 176,667 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 437,500 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 157,500 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 650,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 157,500 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 70,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 375,000 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 544,500 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 47,667 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 325,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 22,784 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 32,334 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 375,000 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 47,667 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 60,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 487,500 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 440,000 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 100,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 125,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 9,167 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 21,167 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 43,500 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 506,250 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 181,250 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 9,167 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 506,250 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 638,000 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 1,312,500 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 543,750 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 60,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 157,500 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 1,680,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 375,000 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 176,667 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 157,500 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 126,667 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 18,834 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 572,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 22,784 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 43,500 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 157,500 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 506,250 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 638,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 487,500 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 47,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 440,000 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 693,750 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 96,667 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 211,500 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 126,667 | n/a |
| Mar 19, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Stock Option (Right to Buy) | Disposal | 562,500 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 375,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 125,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 572,000 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 543,750 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 60,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 47,667 | n/a |
| Mar 19, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Stock Option (Right to Buy) | Acquisition | 572,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 562,500 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 1,312,500 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 47,667 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 18,834 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 562,500 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 47,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 506,250 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 693,750 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 1,540,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 126,667 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 211,500 | n/a |
| Mar 19, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Stock Option (Right to Buy) | Disposal | 572,000 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Disposal | 1,540,000 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 544,500 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 9,167 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 70,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 126,667 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 126,667 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 20,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 22,784 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 30,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 125,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 40,000 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 437,500 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 32,334 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 162,500 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Disposal | 125,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 30,000 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 325,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 22,784 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 20,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Disposal | 126,667 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 181,250 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 162,500 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Disposal | 96,667 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 60,000 | n/a |
| Mar 19, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Stock Option (Right to Buy) | Acquisition | 562,500 | n/a |
| Mar 19, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 650,000 | n/a |
| Mar 19, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 440,000 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 157,500 | n/a |
| Mar 19, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Disposal | 40,000 | n/a |
| Mar 19, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 440,000 | n/a |
| Mar 19, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 100,000 | n/a |
| Jan 2, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Common Stock | Acquisition | 280,000 | $0 |
| Jan 2, 2026 | HASNAIN, FAHEEM | Director, President & CEO | Stock Option (Right to Buy) | Acquisition | 1,680,000 | $0 |
| Jan 2, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Stock Option (Right to Buy) | Acquisition | 506,250 | $0 |
| Jan 2, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Stock Option (Right to Buy) | Acquisition | 506,250 | $0 |
| Jan 2, 2026 | ARANDA, RICHARD | Chief Medical Officer | Common Stock | Acquisition | 93,750 | $0 |
| Jan 2, 2026 | GIRAUDO, BRYAN | COO/CFO | Common Stock | Acquisition | 115,750 | $0 |
| Jan 2, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Common Stock | Acquisition | 93,750 | $0 |
| Jan 2, 2026 | SMITH, ROBERT PAUL JR | Chief Commercial Officer | Stock Option (Right to Buy) | Acquisition | 562,500 | $0 |
| Jan 2, 2026 | ARANDA, RICHARD | Chief Medical Officer | Stock Option (Right to Buy) | Acquisition | 562,500 | $0 |
| Jan 2, 2026 | PETERSON, CARYN | EVP, Regulatory Affairs | Common Stock | Acquisition | 84,500 | $0 |
| Jan 2, 2026 | CHRISTIAN, WAAGE | EVP, Tech Ops and Admin | Common Stock | Acquisition | 84,500 | $0 |
| Jan 2, 2026 | GIRAUDO, BRYAN | COO/CFO | Stock Option (Right to Buy) | Acquisition | 693,750 | $0 |