STTK's three largest insider shareholders as of April 17, 2026 are Group, Llc Redmile (Director, 5.62Mn shares), Group, Llc Redmile (Director, 5.62Mn shares), Group, Llc Redmile (Director, 5.62Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Group, Llc Redmile | - | 0 | 5,615,489 | 01 Apr, 2024 |
| Group, Llc Redmile | - | 0 | 5,615,489 | 01 Apr, 2024 |
| Group, Llc Redmile | - | 0 | 5,615,489 | 01 Apr, 2024 |
| Group, Llc Redmile | - | 0 | 5,539,724 | 06 Dec, 2024 |
| Group, Llc Redmile | - | 0 | 5,539,724 | 06 Dec, 2024 |
| Group, Llc Redmile | - | 0 | 5,539,724 | 06 Dec, 2024 |
| Josiah Hornblower | Chairman | 0 | 2,966,709 | 16 Jul, 2021 |
| Mona Ashiya | - | 0 | 1,051,021 | 02 Sep, 2025 |
| Advisors Llc Orbimed | - | 0 | 1,051,021 | 02 Sep, 2025 |
| Tyler Brous | - | 238,088 | 0 | 01 Jul, 2024 |
| Andrew R Neill | Chief Financial Officer | 228,224 | 0 | 27 Jan, 2026 |
| Arundathy N. Pandite | Chief Medical Officer | 196,219 | 0 | 27 Jan, 2026 |
| Clay B Siegall | - | 128,054 | 0 | 27 Aug, 2025 |
| Erin Ator Thomson | General Counsel | 103,209 | 0 | 27 Jan, 2023 |
| Taylor Schreiber | Chief Executive Officer | 96,612 | 0 | 27 Aug, 2025 |
| Stephen Stout | - | 81,529 | 0 | 27 Jan, 2026 |
| Abhinav A. Shukla | Chief Technical Officer | 81,258 | 0 | 27 Aug, 2025 |
| Casi Deyoung | Chief Business Officer | 73,480 | 0 | 27 Jan, 2026 |
| George Golumbeski | - | 54,613 | 0 | 27 Apr, 2022 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 25 Jan, 2026 | Arundathy N. Pandite | Common Stock | D | 3,195 | $4.15 | 196,219 | D | F |
| 25 Jan, 2026 | Andrew R Neill | Common Stock | D | 2,589 | $4.15 | 228,224 | D | F |
| 25 Jan, 2026 | Casi Deyoung | Common Stock | D | 2,286 | $4.15 | 73,480 | D | F |
| 25 Jan, 2026 | Stephen Stout | Common Stock | D | 593 | $4.15 | 81,529 | D | F |
| 10 Jan, 2026 | Arundathy N. Pandite | Common Stock | D | 6,851 | $4.75 | 199,414 | D | F |
| 10 Jan, 2026 | Andrew R Neill | Common Stock | D | 6,660 | $4.75 | 230,813 | D | F |
| 10 Jan, 2026 | Taylor Schreiber | Stock Option (Right to Buy) | A | 1,548,300 | $0.00 | 1,548,300 | D | A |
| 10 Jan, 2026 | Casi Deyoung | Common Stock | D | 5,699 | $4.75 | 75,766 | D | F |
| 10 Jan, 2026 | Abhinav A. Shukla | Common Stock | A | 315,500 | $0.00 | 315,500 | D | A |
| 10 Jan, 2026 | Stephen Stout | Common Stock | D | 4,153 | $4.75 | 82,122 | D | F |
| 10 Jan, 2026 | Arundathy N. Pandite | Common Stock | A | 487,800 | $0.00 | 487,800 | D | A |
| 10 Jan, 2026 | Andrew R Neill | Stock Option (Right to Buy) | A | 549,800 | $0.00 | 549,800 | D | A |
| 10 Jan, 2026 | Stephen Stout | Stock Option (Right to Buy) | A | 351,400 | $0.00 | 351,400 | D | A |
| 10 Jan, 2026 | Casi Deyoung | Common Stock | A | 381,600 | $0.00 | 381,600 | D | A |
| 28 Aug, 2025 | Daniel G. Baker | Stock Option (Right to Buy) | A | 66,300 | $0.00 | 66,300 | D | A |
| 25 Aug, 2025 | Mona Ashiya | Common Stock | A | 5,255,106 | $0.87 | 5,255,106 | I | P |
| 25 Aug, 2025 | Advisors Llc Orbimed | Common Stock | A | 5,255,106 | $0.87 | 5,255,106 | I | P |
| 28 Aug, 2025 | Mona Ashiya | Stock Option (Right to Buy) | A | 66,300 | $0.00 | 66,300 | D | A |
| 25 Aug, 2025 | Advisors Llc Orbimed | Common Stock | A | 1,051,021 | $0.87 | 1,051,021 | I | P |
| 25 Aug, 2025 | Mona Ashiya | Common Stock | A | 1,051,021 | $0.87 | 1,051,021 | I | P |