Shattuck Labs's top three insider shareholders as of May 30, 2026 are Josiah Hornblower (Chairman, 2.97Mn shares), Advisors Llc Orbimed (Director, 1.05Mn shares), Mona Ashiya (Director, 1.05Mn shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Advisors Llc Orbimed | - | 0 | 1,051,021 | 02 Sep, 2025 |
| Clay B Siegall | - | 128,054 | 0 | 27 Aug, 2025 |
| George Golumbeski | - | 54,613 | 0 | 27 Apr, 2022 |
| Taylor Schreiber | Chief Executive Officer | 96,612 | 0 | 27 Aug, 2025 |
| Casi Deyoung | Chief Business Officer | 73,480 | 0 | 27 Jan, 2026 |
| Mona Ashiya | - | 0 | 1,051,021 | 02 Sep, 2025 |
| Erin Ator Thomson | General Counsel | 103,209 | 0 | 27 Jan, 2023 |
| Andrew R Neill | Chief Financial Officer | 228,224 | 0 | 27 Jan, 2026 |
| Arundathy N. Pandite | Chief Medical Officer | 196,219 | 0 | 27 Jan, 2026 |
| Josiah Hornblower | Chairman | 0 | 2,966,709 | 16 Jul, 2021 |
| Tyler Brous | - | 238,088 | 0 | 01 Jul, 2024 |
| Abhinav A. Shukla | Chief Technical Officer | 81,258 | 0 | 27 Aug, 2025 |
| Stephen Stout | - | 81,529 | 0 | 27 Jan, 2026 |
* 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 | 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 |
| 25 Jan, 2026 | Andrew R Neill | Common Stock | D | 2,589 | $4.15 | 228,224 | D | F |
| 25 Jan, 2026 | Stephen Stout | Common Stock | D | 593 | $4.15 | 81,529 | D | F |
| 25 Jan, 2026 | Arundathy N. Pandite | Common Stock | D | 3,195 | $4.15 | 196,219 | 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 | Abhinav A. Shukla | Common Stock | A | 315,500 | $0.00 | 315,500 | D | A |
| 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 | Stephen Stout | Common Stock | D | 4,153 | $4.75 | 82,122 | 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 | Andrew R Neill | Stock Option (Right to Buy) | A | 549,800 | $0.00 | 549,800 | D | A |
| 10 Jan, 2026 | Arundathy N. Pandite | Common Stock | A | 487,800 | $0.00 | 487,800 | 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 |
| 10 Jan, 2026 | Stephen Stout | Stock Option (Right to Buy) | A | 351,400 | $0.00 | 351,400 | D | A |
| 25 Aug, 2025 | Advisors Llc Orbimed | Common Stock | A | 5,255,106 | $0.87 | 5,255,106 | I | P |
| 25 Aug, 2025 | Mona Ashiya | Common Stock | A | 5,255,106 | $0.87 | 5,255,106 | I | P |