As of August 04, 2026, the three largest insider holders of TPST are Thomas Woiwode (Director, 2.12Mn shares), Matthew Angel (Ceo And President, 231.48K shares), Venture Capital Vi, L.P. Versant (TenPercentOwner, 209.94K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Stephen R Brady | President And Ceo | 46,376 | 0 | 08 Jul, 2024 |
| Thomas Woiwode | - | 0 | 2,118,644 | 03 May, 2022 |
| Thomas W. Dubensky | President | 113,343 | 0 | 11 Jan, 2022 |
| Venture Capital Vi, L.P. Versant | - | 209,941 | 0 | 12 Aug, 2024 |
| Samuel Whiting | Chief Medical Officer | 9,573 | 0 | 03 Jul, 2024 |
| Matthew Angel | Ceo And President | 0 | 231,482 | 25 Mar, 2026 |
| Justin Trojanowski | Corporate Controller | 22,168 | 0 | 02 Jul, 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 |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | Justin Trojanowski | Employee Stock Option (right to buy) | A | 22,000 | $0.00 | 22,000 | D | A |
| 31 Mar, 2026 | Justin Trojanowski | Employee Stock Option (right to buy) | A | 22,000 | $0.00 | 22,000 | D | A |
| 31 Mar, 2026 | Justin Trojanowski | Employee Stock Option (right to buy) | A | 22,000 | $0.00 | 22,000 | D | A |
| 31 Mar, 2026 | Nicholas Maestas | Employee Stock Option (right to buy) | A | 140,000 | $0.00 | 140,000 | D | A |
| 24 Mar, 2026 | Matthew Angel | Common Stock | A | 231,482 | $2.16 | 231,482 | I | P |
| 04 Feb, 2026 | Matthew Angel | Employee Stock Option (right to buy) | A | 269,621 | $0.00 | 269,621 | D | A |
| 27 Jan, 2026 | Geoffrey Nichol | Stock Option (right to buy) | A | 1,230 | $0.00 | 1,230 | D | A |
| 27 Jan, 2026 | Ronit Simantov | Stock Option (right to buy) | A | 1,230 | $0.00 | 1,230 | D | A |
| 27 Jan, 2026 | Christine A Pellizzari | Stock Option (right to buy) | A | 1,230 | $0.00 | 1,230 | D | A |
| 27 Jan, 2026 | Michael Raab | Stock Option (right to buy) | A | 1,230 | $0.00 | 1,230 | D | A |
| 02 Jan, 2025 | Nicholas Maestas | Employee Stock Option (right to buy) | A | 200,000 | $0.00 | 200,000 | D | A |
| 02 Jan, 2025 | Justin Trojanowski | Employee Stock Option (right to buy) | A | 30,000 | $0.00 | 30,000 | D | A |
| 02 Jan, 2025 | Samuel Whiting | Employee Stock Option (right to buy) | A | 270,000 | $0.00 | 270,000 | D | A |
| 02 Jan, 2025 | Stephen R Brady | Employee Stock Option (right to buy) | A | 550,000 | $0.00 | 550,000 | D | A |
| 02 Jan, 2025 | Justin Trojanowski | Employee Stock Option (right to buy) | A | 30,000 | $0.00 | 30,000 | D | A |
| 02 Jan, 2025 | Samuel Whiting | Employee Stock Option (right to buy) | A | 270,000 | $0.00 | 270,000 | D | A |
| 02 Jan, 2025 | Samuel Whiting | Employee Stock Option (right to buy) | A | 270,000 | $0.00 | 270,000 | D | A |
| 02 Jan, 2025 | Justin Trojanowski | Employee Stock Option (right to buy) | A | 30,000 | $0.00 | 30,000 | D | A |
| 08 Aug, 2024 | Venture Capital Vi, L.P. Versant | Common Stock | D | 400,000 | $1.35 | 597,940 | D | S |
| 08 Aug, 2024 | Venture Capital Vi, L.P. Versant | Common Stock | D | 400,000 | $1.35 | 597,940 | D | S |