STTK's three largest insider shareholders as of September 29, 2026 are Group, Llc Redmile (Director, 5.62Mn shares), Group, Llc Redmile (Director, 5.54Mn shares), Advisors Llc Orbimed (Director, 1.05Mn shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Group, Llc Redmile | Director, TenPercentOwner | 0 | 11,155,213 | 11,155,213 | 75.4% | 06 Dec, 2024 |
| 2 | Advisors Llc Orbimed | Director | 0 | 1,051,021 | 1,051,021 | 7.1% | 02 Sep, 2025 |
| 3 | Mona Ashiya | Director | 0 | 1,051,021 | 1,051,021 | 7.1% | 02 Sep, 2025 |
| 4 | Clay B Siegall | Director | 318,608 | 0 | 318,608 | 2.2% | 11 Jun, 2026 |
| 5 | Andrew R Neill | Chief Financial Officer | 292,251 | 0 | 292,251 | 2.0% | 14 May, 2026 |
| 6 | Tyler Brous | Director | 238,088 | 0 | 238,088 | 1.6% | 01 Jul, 2024 |
| 7 | Arundathy N. Pandite | Chief Medical Officer | 136,219 | 0 | 136,219 | 0.9% | 02 Jul, 2026 |
| 8 | Taylor Schreiber | Chief Executive Officer | 122,222 | 0 | 122,222 | 0.8% | 13 May, 2026 |
| 9 | Erin Ator Thomson | General Counsel | 103,209 | 0 | 103,209 | 0.7% | 27 Jan, 2023 |
| 10 | Abhinav A. Shukla | Chief Technical Officer | 98,533 | 0 | 98,533 | 0.7% | 07 Jul, 2026 |
| 11 | Stephen Stout | Officer | 93,366 | 0 | 93,366 | 0.6% | 18 May, 2026 |
| 12 | Casi Deyoung | Chief Business Officer | 73,480 | 0 | 73,480 | 0.5% | 27 Jan, 2026 |
| 13 | George Golumbeski | Director | 54,613 | 0 | 54,613 | 0.4% | 27 Apr, 2022 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 02 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Acquired M | 410 | $3.57 | $1.46K | 86,790 | Direct |
| 02 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed S | 410 | $7.01 | $2.87K | 86,380 | Direct |
| 06 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Acquired M | 12,153 | $3.57 | $43.39K | 98,533 | Direct |
| 02 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed M | 410 | $0.00 | $0 | 26,293 | Direct |
| 06 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed M | 12,153 | $0.00 | $0 | 14,140 | Direct |
| 30 Jun, 2026 | Abhinav A. Shukla | Chief Technical Officer | Acquired M | 23,365 | $3.57 | $83.41K | 109,745 | Direct |
| 30 Jun, 2026 | Arundathy N. Pandite | Chief Medical Officer | Disposed S | 30,000 | $7.01 | $210.30K | 136,219 | Direct |
| 30 Jun, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed S | 23,365 | $7.08 | $165.42K | 86,380 | Direct |
| 01 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Acquired M | 100 | $3.57 | $357 | 86,480 | Direct |
| 01 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed S | 100 | $7.07 | $707 | 86,380 | Direct |
| 30 Jun, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed M | 23,365 | $0.00 | $0 | 26,803 | Direct |
| 01 Jul, 2026 | Abhinav A. Shukla | Chief Technical Officer | Disposed M | 100 | $0.00 | $0 | 26,703 | Direct |
| 11 Jun, 2026 | Mona Ashiya | Director | Acquired P | 1,041,667 | — | — | 26,519,541 | Indirect |
| 11 Jun, 2026 | Advisors Llc Orbimed | Director | Acquired P | 1,041,667 | — | — | 26,519,541 | Indirect |
| 11 Jun, 2026 | Advisors Llc Orbimed | Director | Acquired P | 208,333 | — | — | 5,303,908 | Indirect |
| 11 Jun, 2026 | Mona Ashiya | Director | Acquired P | 208,333 | — | — | 5,303,908 | Indirect |
| 09 Jun, 2026 | Clay B Siegall | Director | Acquired P | 62,500 | $4.00 | $250.00K | 318,608 | Direct |
| 08 Jun, 2026 | Advisors Llc Orbimed | Director | Acquired C | 15,366,490 | — | — | 25,477,874 | Indirect |
| 08 Jun, 2026 | Mona Ashiya | Director | Acquired C | 15,366,490 | — | — | 25,477,874 | Indirect |
| 08 Jun, 2026 | Advisors Llc Orbimed | Director | Acquired C | 3,073,298 | — | — | 5,095,575 | Indirect |