Based on data from the past 90 days ending January 10, 2026, Shattuck Labs's three largest insider shareholders are Director Group, Llc Redmile (5.54Mn shares), Director Josiah Hornblower (3.16Mn shares), Chief Executive Officer Taylor Schreiber (2.71Mn shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Group, Llc Redmile | 5,539,724 | 06 Dec, 2024 | |
| Josiah Hornblower | 3,155,084 | 25 Jun, 2021 | |
| Taylor Schreiber | Chief Executive Officer | 2,707,362 | 27 Aug, 2025 |
| Mona Ashiya | 1,051,021 | 02 Sep, 2025 | |
| Advisors Llc Orbimed | 1,051,021 | 02 Sep, 2025 | |
| Tyler Brous | 238,088 | 01 Jul, 2024 | |
| Andrew R Neill | Chief Financial Officer | 237,473 | 27 Aug, 2025 |
| Arundathy N. Pandite | Chief Medical Officer | 206,265 | 28 Jan, 2025 |
| Clay B Siegall | 128,054 | 27 Aug, 2025 | |
| Erin Ator Thomson | General Counsel | 103,209 | 27 Jan, 2023 |
| Stephen Stout | Nan | 86,275 | 27 Aug, 2025 |
| Casi Deyoung | Chief Business Officer | 81,465 | 28 Jan, 2025 |
| Abhinav A. Shukla | Chief Technical Officer | 81,258 | 27 Aug, 2025 |
| George Golumbeski | 54,613 | 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 Aug, 2025 | Advisors Llc Orbimed | Common Stock | A | 5,255,106 | $0.87 | 5,255,106 | I | P |
| 25 Aug, 2025 | Advisors Llc Orbimed | Common Stock | A | 1,051,021 | $0.87 | 1,051,021 | I | P |
| 25 Aug, 2025 | Clay B Siegall | Common Stock | A | 128,054 | $0.87 | 128,054 | D | A |
| 25 Aug, 2025 | Taylor Schreiber | Common Stock | A | 25,610 | $0.87 | 96,612 | D | A |
| 25 Aug, 2025 | Mona Ashiya | Common Stock | A | 5,255,106 | $0.87 | 5,255,106 | I | P |
| 25 Aug, 2025 | Mona Ashiya | Common Stock | A | 1,051,021 | $0.87 | 1,051,021 | I | P |
| 25 Aug, 2025 | Andrew R Neill | Common Stock | A | 64,027 | $0.87 | 237,473 | D | A |
| 25 Aug, 2025 | Abhinav A. Shukla | Common Stock | A | 5,122 | $0.87 | 81,258 | D | A |
| 25 Aug, 2025 | Stephen Stout | Common Stock | A | 12,805 | $0.87 | 86,275 | D | A |
| 25 Jan, 2025 | Casi Deyoung | Common Stock | D | 2,297 | $1.16 | 81,465 | D | F |
| 25 Jan, 2025 | Arundathy N. Pandite | - | - | 206,265 | D | |||
| 25 Jan, 2025 | Arundathy N. Pandite | Common Stock | D | 3,211 | $1.16 | 206,265 | D | F |
| 25 Jan, 2025 | Abhinav A. Shukla | Common Stock | D | 2,261 | $1.16 | 73,536 | D | F |
| 10 Jan, 2025 | Casi Deyoung | Common Stock | D | 5,727 | $1.19 | 83,762 | D | F |
| 10 Jan, 2025 | Casi Deyoung | - | - | 83,762 | D | |||
| 10 Jan, 2025 | Arundathy N. Pandite | Common Stock | D | 6,884 | $1.19 | 209,476 | D | F |
| 10 Jan, 2025 | Abhinav A. Shukla | Common Stock | D | 4,830 | $1.19 | 74,597 | D | F |
| 04 Dec, 2024 | Group, Llc Redmile | Common Stock, par value $0.0001 per share | A | 1,026,888 | $1.25 | 5,539,724 | I | J |
| 04 Dec, 2024 | Group, Llc Redmile | - | - | 4,512,836 | I | |||
| 04 Dec, 2024 | Group, Llc Redmile | - | - | 5,406,353 | I |