Through the 90-day period concluding December 12, 2025, Tectonic Therapeutic's top three insider stakeholders include Director Terrance Mcguire (573.06K shares), Chief Executive Officer Alise Reicin (238.56K shares), Chief Medical Officer Marcella K. Ruddy (55.31K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Timothy A Springer | 5,838,204 | 11 Apr, 2025 | |
| Geoffrey Mackay | President & CEO | 52,759 | 26 Jan, 2023 |
| Terrance Mcguire | 573,062 | 07 Apr, 2025 | |
| Braden Michael Leonard | 36,139 | 25 Jun, 2024 | |
| Alise Reicin | Chief Executive Officer | 238,562 | 29 Sep, 2025 |
| Christian Cortis | Chief Operating Officer | 10,530 | 24 Jun, 2024 |
| Azadeh Golipour | Chief Technology Officer | 4,656 | 05 Feb, 2024 |
| Marcella K. Ruddy | Chief Medical Officer | 55,311 | 29 Sep, 2025 |
| Peter Mcnamara | Chief Scientific Officer | 33,879 | 29 Sep, 2025 |
| Erik Ostrowski | Interim CEO And President And Cfo | 2,440 | 05 Feb, 2024 |
| Daniel Lochner | Chief Financial Officer | 28,121 | 29 Sep, 2025 |
| Stefan Vitorovic | 2,314 | 24 Jun, 2024 | |
| Marc Schwabish | Chief Business Officer | 22,933 | 29 Sep, 2025 |
| Steven Avruch | Chief Legal Officer | 1,835 | 05 Feb, 2024 |
| Essra Ridha | Chief Medical Officer | 1,323 | 05 Feb, 2024 |
| Philip J. Vickers | 400 | 08 Jul, 2021 | |
| Praveen P. Tipirneni | 253 | 24 Jun, 2024 | |
| Phillip B. Donenberg | 167 | 18 Feb, 2021 |
* 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 Sep, 2025 | Marc Schwabish | Common Stock | A | 4,210 | $0.00 | 22,933 | D | A |
| 25 Sep, 2025 | Alise Reicin | Common Stock | A | 14,700 | $0.00 | 228,185 | D | A |
| 25 Sep, 2025 | Daniel Lochner | Common Stock | A | 5,430 | $0.00 | 28,121 | D | A |
| 25 Sep, 2025 | Marcella K. Ruddy | Common Stock | A | 5,370 | $0.00 | 55,311 | D | A |
| 25 Sep, 2025 | Peter Mcnamara | Common Stock | A | 4,550 | $0.00 | 33,879 | D | A |
| 20 Jun, 2025 | Alise Reicin | Common Stock | D | 859 | $19.81 | 213,485 | D | F |
| 09 Apr, 2025 | Timothy A Springer | Common Stock | A | 2,861 | $14.62 | 4,316,419 | D | P |
| 09 Apr, 2025 | Timothy A Springer | - | - | 4,316,419 | D | |||
| 09 Apr, 2025 | Timothy A Springer | - | - | 4,317,276 | D | |||
| 09 Apr, 2025 | Timothy A Springer | Common Stock | A | 857 | $15.23 | 4,317,276 | D | P |
| 10 Apr, 2025 | Timothy A Springer | Common Stock | A | 8,092 | $16.73 | 4,325,368 | D | P |
| 10 Apr, 2025 | Timothy A Springer | - | - | 4,325,368 | D | |||
| 11 Apr, 2025 | Timothy A Springer | - | - | 4,334,846 | D | |||
| 11 Apr, 2025 | Timothy A Springer | Common Stock | A | 9,478 | $16.31 | 4,334,846 | D | P |
| 09 Apr, 2025 | Timothy A Springer | - | - | 1,398,938 | I | |||
| 09 Apr, 2025 | Timothy A Springer | Common Stock | A | 16,215 | $14.62 | 1,398,938 | I | P |
| 09 Apr, 2025 | Timothy A Springer | Common Stock | A | 4,856 | $15.23 | 1,403,794 | I | P |
| 09 Apr, 2025 | Timothy A Springer | - | - | 1,403,794 | I | |||
| 10 Apr, 2025 | Timothy A Springer | - | - | 1,449,652 | I | |||
| 10 Apr, 2025 | Timothy A Springer | Common Stock | A | 45,858 | $16.73 | 1,449,652 | I | P |