ARCT's three largest insider shareholders as of May 04, 2026 are Joseph E Payne (President And Ceo, 1.48Mn shares), Pad Chivukula (Chief Scientific Officer Coo, 435.33K shares), Andy Sassine (Chief Financial Officer, 221.76K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Joseph E Payne | President And Ceo | 1,480,097 | 0 | 28 Nov, 2022 |
| Pad Chivukula | Chief Scientific Officer Coo | 435,334 | 0 | 16 Oct, 2024 |
| Andy Sassine | Chief Financial Officer | 221,764 | 0 | 20 Aug, 2025 |
| Magda Marquet | - | 0 | 24,942 | 19 Dec, 2022 |
| James F Barlow | - | 13,131 | 0 | 18 Jun, 2024 |
| Magda Marquet | - | 3,131 | 0 | 18 Jun, 2024 |
| Edward W Holmes | - | 3,131 | 0 | 18 Jun, 2024 |
| Keith C Kummerfeld | - | 950 | 0 | 18 Jul, 2023 |
* 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 |
|---|---|---|---|---|---|---|---|---|
| 17 Dec, 2025 | Joseph E Payne | Employee Stock Option (right to buy) | A | 175,000 | $0.00 | 175,000 | D | A |
| 17 Dec, 2025 | Lance Kurata | Employee Stock Option (right to buy) | A | 54,000 | $0.00 | 54,000 | D | A |
| 17 Dec, 2025 | Pad Chivukula | Employee Stock Option (right to buy) | A | 54,000 | $0.00 | 54,000 | D | A |
| 17 Dec, 2025 | Joseph Roberts | Employee Stock Option (right to buy) | A | 10,000 | $0.00 | 10,000 | D | A |
| 15 Aug, 2025 | Andy Sassine | Common Stock | A | 1,238 | $16.56 | 221,764 | D | P |
| 15 Aug, 2025 | Andy Sassine | Common Stock | D | 1,238 | $16.56 | 221,764 | D | P |
| 09 Jun, 2025 | Magda Marquet | Stock option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 09 Jun, 2025 | Edward W Holmes | Stock option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 09 Jun, 2025 | James F Barlow | Stock option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 09 Jun, 2025 | John Markels | Stock option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 09 Jun, 2025 | Moncef Slaoui | Stock option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 16 Dec, 2024 | Andy Sassine | Employee Stock Option (right to buy) | A | 60,000 | $0.00 | 60,000 | D | A |
| 16 Dec, 2024 | Lance Kurata | Employee Stock Option (right to buy) | A | 60,000 | $0.00 | 60,000 | D | A |
| 16 Dec, 2024 | Joseph E Payne | Employee Stock Option (right to buy) | A | 196,000 | $0.00 | 196,000 | D | A |
| 16 Dec, 2024 | Pad Chivukula | Employee Stock Option (right to buy) | A | 60,000 | $0.00 | 60,000 | D | A |
| 15 Oct, 2024 | Pad Chivukula | Common Stock | D | 12,000 | $20.76 | 435,334 | D | S |
| 19 Jun, 2024 | Moncef Slaoui | Stock option (right to buy) | A | 15,000 | $0.00 | 15,000 | D | A |
| 19 Jun, 2024 | Moncef Slaoui | Stock option (right to buy) | A | 14,794 | $0.00 | 14,794 | D | A |
| 14 Jun, 2024 | John Markels | Common Stock | A | 3,131 | $0.00 | 3,131 | D | M |
| 14 Jun, 2024 | Magda Marquet | Common Stock | A | 3,131 | $0.00 | 3,131 | D | M |