As of March 23, 2026, the three largest insider holders of ACET are Advisors Llc Orbimed (TenPercentOwner, 280.64K shares), Andrew Sinclair (Director, 132.21K shares), Carl L Gordon (Director, 78.50K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Advisors Llc Orbimed | 0 | 280,641 | 10 Oct, 2025 | |
| Andrew Sinclair | 0 | 132,212 | 13 Dec, 2021 | |
| Carl L Gordon | 0 | 78,499 | 26 Jan, 2024 | |
| Aya Jakobovits | 0 | 22,272 | 11 Mar, 2022 | |
| Lloyd Klickstein | 6,785 | 0 | 13 Jun, 2025 | |
| Francesco Galimi | Svp Chief Medical Officer | 6,363 | 0 | 26 Jan, 2024 |
| Chen Schor | President Ceo | 0 | 2,717 | 02 Oct, 2023 |
| Steve Dubin | 1,419 | 0 | 13 Jun, 2025 | |
| Andrew Sinclair | 1,106 | 0 | 13 Jun, 2025 | |
| Jeffrey Chodakewitz | 1,106 | 0 | 13 Jun, 2025 | |
| Katie Peng | 738 | 0 | 13 Jun, 2025 | |
| Carl L Gordon | 738 | 0 | 07 Jun, 2024 | |
| Aya Jakobovits | 738 | 0 | 07 Jun, 2024 | |
| Chen Schor | President Ceo | 6,820 | 0 | 27 Jan, 2026 |
| Michael Kauffman | 369 | 0 | 07 Jun, 2024 | |
| Bastiano Sanna | 369 | 0 | 02 Jun, 2023 | |
| Brian Nicholas Harvey | Chief Financial Officer | 5,145 | 0 | 27 Jan, 2026 |
| Don Healey | Chief Technology Officer | 3,452 | 0 | 27 Jan, 2026 |
| Blake Aftab | Chief Scientific Officer | 2,981 | 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 |
|---|---|---|---|---|---|---|---|---|
| 24 Jan, 2026 | Blake Aftab | Common Stock | D | 535 | $8.44 | 2,981 | D | F |
| 24 Jan, 2026 | Don Healey | Common Stock | D | 535 | $8.44 | 3,452 | D | F |
| 24 Jan, 2026 | Brian Nicholas Harvey | Common Stock | D | 546 | $8.44 | 5,145 | D | F |
| 24 Jan, 2026 | Chen Schor | Common Stock | D | 1,755 | $8.44 | 6,820 | D | F |
| 08 Oct, 2025 | Advisors Llc Orbimed | Common Stock | A | 1,500,000 | $1.00 | 564,147 | I | P |
| 08 Oct, 2025 | Advisors Llc Orbimed | Common Stock | A | 3,500,000 | $1.00 | 280,641 | I | P |
| 11 Jun, 2025 | Jeffrey Chodakewitz | Common Stock | A | 5,900 | $0.00 | 1,106 | D | A |
| 11 Jun, 2025 | Lloyd Klickstein | Common Stock | A | 5,900 | $0.00 | 6,785 | D | A |
| 11 Jun, 2025 | Katie Peng | Common Stock | A | 5,900 | $0.00 | 738 | D | A |
| 11 Jun, 2025 | Andrew Sinclair | Common Stock | A | 5,900 | $0.00 | 1,106 | D | A |
| 11 Jun, 2025 | Steve Dubin | Common Stock | A | 5,900 | $0.00 | 1,419 | D | A |
| 11 Jun, 2025 | Lloyd Klickstein | Stock Option (Right to Buy) | A | 26,400 | $0.00 | 1,650 | D | A |
| 11 Jun, 2025 | Jeffrey Chodakewitz | Stock Option (Right to Buy) | A | 26,400 | $0.00 | 1,650 | D | A |
| 11 Jun, 2025 | Steve Dubin | Stock Option (Right to Buy) | A | 26,400 | $0.00 | 1,650 | D | A |
| 11 Jun, 2025 | Andrew Sinclair | Stock Option (Right to Buy) | A | 26,400 | $0.00 | 1,650 | D | A |
| 11 Jun, 2025 | Katie Peng | Stock Option (Right to Buy) | A | 26,400 | $0.00 | 1,650 | D | A |
| 17 Apr, 2025 | Michael Grissinger | Stock Option (Right to Buy) | A | 70,200 | $0.00 | 4,388 | D | A |
| 31 Jan, 2025 | Chen Schor | Stock Option (Right to Buy) | A | 763,829 | $0.00 | 47,739 | D | A |
| 31 Jan, 2025 | Julia D. Maltzman | Stock Option (Right to Buy) | A | 750,000 | $0.00 | 46,875 | D | A |
| 31 Jan, 2025 | Blake Aftab | Stock Option (Right to Buy) | A | 275,000 | $0.00 | 17,188 | D | A |