As of May 30, 2026, the three largest insider holders of ZYME are Capital, Llc Ecor1 (Director, 22.97Mn shares), Capital, Llc Ecor1 (TenPercentOwner, 19.97Mn shares), Gregory Austin Ciongoli (Director, 488.50K shares).
| Holder | Position | Shares (Direct) | Shares (Indirect) | Report Date |
|---|---|---|---|---|
| Leone D Patterson | Evp, Chief Bus Fin Officer | 459 | 0 | 07 Jan, 2026 |
| Kenneth Galbraith | Chair Ceo | 226,842 | 0 | 12 Jan, 2026 |
| Capital, Llc Ecor1 | - | 0 | 22,970,388 | 27 Jun, 2025 |
| Jeffrey T L Smith | Evp Chief Medical Officer | 26,708 | 0 | 12 Jan, 2026 |
| Neil A Klompas | President Coo | 17,032 | 0 | 14 Mar, 2023 |
| Neil Josephson | Chief Medical Officer | 14,449 | 0 | 23 Dec, 2022 |
| Christopher Astle | Svp Chief Financial Officer | 6,503 | 0 | 08 Jan, 2024 |
| Paul Andrew Moore | Chief Scientific Officer | 48,497 | 0 | 12 Jan, 2026 |
| Gregory Austin Ciongoli | - | 488,500 | 0 | 12 Aug, 2025 |
| Mark Hollywood | Evp Chief Operating Officer | 132,913 | 0 | 13 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 |
|---|---|---|---|---|---|---|---|---|
| 09 Apr, 2026 | Scott Platshon | Stock Option (Right to Buy) | A | 70,000 | $0.00 | 70,000 | D | A |
| 09 Apr, 2026 | Adam Schayowitz | Stock Option (Right to Buy) | A | 70,000 | $0.00 | 70,000 | D | A |
| 09 Apr, 2026 | Adam Schayowitz | Stock Option (Right to Buy) | A | 70,000 | $0.00 | 70,000 | D | A |
| 09 Apr, 2026 | Scott Platshon | Stock Option (Right to Buy) | A | 70,000 | $0.00 | 70,000 | D | A |
| 09 Apr, 2026 | Adam Schayowitz | Restricted Stock Unit | A | 47,000 | $0.00 | 47,000 | D | A |
| 09 Apr, 2026 | Scott Platshon | Restricted Stock Unit | A | 47,000 | $0.00 | 47,000 | D | A |
| 09 Apr, 2026 | Scott Platshon | Restricted Stock Unit | A | 47,000 | $0.00 | 47,000 | D | A |
| 09 Apr, 2026 | Adam Schayowitz | Restricted Stock Unit | A | 47,000 | $0.00 | 47,000 | D | A |
| 09 Apr, 2026 | Adam Schayowitz | Performance Stock Unit | A | 76,000 | $0.00 | 76,000 | D | A |
| 09 Apr, 2026 | Adam Schayowitz | Performance Stock Unit | A | 76,000 | $0.00 | 76,000 | D | A |
| 09 Apr, 2026 | Scott Platshon | Performance Stock Unit | A | 76,000 | $0.00 | 76,000 | D | A |
| 09 Apr, 2026 | Scott Platshon | Performance Stock Unit | A | 76,000 | $0.00 | 76,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Stock Option (Right to Buy) | A | 178,000 | $0.00 | 178,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Stock Option (Right to Buy) | A | 178,000 | $0.00 | 178,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Stock Option (Right to Buy) | A | 178,000 | $0.00 | 178,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Restricted Stock Unit | A | 119,000 | $0.00 | 119,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Restricted Stock Unit | A | 119,000 | $0.00 | 119,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Restricted Stock Unit | A | 119,000 | $0.00 | 119,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Restricted Stock Unit | A | 50,000 | $0.00 | 50,000 | D | A |
| 06 Apr, 2026 | Kristin Stafford | Restricted Stock Unit | A | 50,000 | $0.00 | 50,000 | D | A |