As of April 22, 2026, the three largest insider holders of GOSS are Waage Christian (Evp, Tech Ops And Admin, 814.06K shares), Bryan Giraudo (Coo/Cfo, 480.01K shares), Richard Aranda (Chief Medical Officer, 463.11K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Waage Christian | Evp, Tech Ops And Admin | 814,061 | 0 | 05 Jan, 2026 |
| Bryan Giraudo | Coo/Cfo | 0 | 480,010 | 20 Jun, 2024 |
| Richard Aranda | Chief Medical Officer | 463,106 | 0 | 05 Jan, 2026 |
| Bryan Giraudo | Coo/Cfo | 389,737 | 0 | 05 Jan, 2026 |
| Robert Paul Jr Smith | Chief Commercial Officer | 260,898 | 0 | 05 Jan, 2026 |
| Caryn Peterson | Evp, Regulatory Affairs | 259,333 | 0 | 05 Jan, 2026 |
| Laura Carter | Chief Scientific Officer | 76,263 | 0 | 20 Mar, 2023 |
| Sandra Milligan | - | 58,050 | 0 | 20 Aug, 2025 |
| Waage Christian | Evp, Tech Ops And Admin | 0 | 45,892 | 26 Jul, 2023 |
| Sandra Milligan | - | 0 | 32,000 | 17 Nov, 2023 |
| Robert Paul Jr Smith | Chief Commercial Officer | 0 | 25,000 | 20 Jun, 2024 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 19 Mar, 2026 | Faheem Hasnain | Stock Option (Right to Buy) | D | 1,680,000 | - | 0 | D | D |
| 19 Mar, 2026 | Waage Christian | Stock Option (Right to Buy) | D | 506,250 | - | 0 | D | D |
| 19 Mar, 2026 | Bryan Giraudo | Stock Option (Right to Buy) | D | 693,750 | - | 0 | D | D |
| 19 Mar, 2026 | Robert Paul Jr Smith | Stock Option (Right to Buy) | D | 562,500 | - | 0 | D | D |
| 19 Mar, 2026 | Richard Aranda | Stock Option (Right to Buy) | D | 562,500 | - | 0 | D | D |
| 19 Mar, 2026 | Caryn Peterson | Stock Option (Right to Buy) | D | 506,250 | - | 0 | D | D |
| 19 Mar, 2026 | Richard Aranda | Stock Option (Right to Buy) | D | 572,000 | - | 0 | D | D |
| 19 Mar, 2026 | Faheem Hasnain | Stock Option (Right to Buy) | D | 1,540,000 | - | 0 | D | D |
| 19 Mar, 2026 | Caryn Peterson | Stock Option (Right to Buy) | D | 440,000 | - | 0 | D | D |
| 19 Mar, 2026 | Waage Christian | Stock Option (Right to Buy) | D | 440,000 | - | 0 | D | D |
| 19 Mar, 2026 | Bryan Giraudo | Stock Option (Right to Buy) | D | 638,000 | - | 0 | D | D |
| 19 Mar, 2026 | Robert Paul Jr Smith | Stock Option (Right to Buy) | D | 572,000 | - | 0 | D | D |
| 19 Mar, 2026 | Waage Christian | Stock Option (Right to Buy) | D | 375,000 | - | 0 | D | D |
| 19 Mar, 2026 | Bryan Giraudo | Stock Option (Right to Buy) | D | 543,750 | - | 0 | D | D |
| 19 Mar, 2026 | Faheem Hasnain | Stock Option (Right to Buy) | D | 1,312,500 | - | 0 | D | D |
| 19 Mar, 2026 | Caryn Peterson | Stock Option (Right to Buy) | D | 375,000 | - | 0 | D | D |
| 19 Mar, 2026 | Robert Paul Jr Smith | Stock Option (Right to Buy) | A | 562,500 | - | 562,500 | D | A |
| 19 Mar, 2026 | Richard Aranda | Stock Option (Right to Buy) | D | 487,500 | - | 0 | D | D |
| 19 Mar, 2026 | Faheem Hasnain | Stock Option (Right to Buy) | D | 437,500 | - | 0 | D | D |
| 19 Mar, 2026 | Richard Aranda | Stock Option (Right to Buy) | D | 162,500 | - | 0 | D | D |