List of insiders holdings for Zymeworks Inc.:
- Shares directly owned by the insider.
- Shares indirectly owned by the insider.
- Total shares owned by the insider (sum of shares directly and indirectly owned).
- Total market value if available.
- Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
What is insider trading>>
- Peter Lynch
What is insider trading>>
| # | Insider Holder Name | Report Date Time | Shares Owned Directly Indirectly | Total Shares Owned | Filing |
| 1 | EcoR1 Capital LLC NODELMAN OLEG Director 10% Owner | 2025-06-27 18:14:18 | 22,970,388 0 | 22,970,388 | Form 13D |
| 2 | Redmile Group LLC Green Jeremy 10% Owner | 2025-08-14 16:20:34 | 4,150,627 0 | 4,150,627 | Form 13G |
| 3 | Ciongoli Gregory Austin Director | 2025-08-12 20:30:06 | 550,500 5,000 | 555,500 | Form 4 |
| 4 | Galbraith Kenneth Chair & CEO | 2025-01-10 17:58:01 | 480,000 0 | 480,000 | Form 4 |
| 5 | PATTERSON LEONE D EVP, Chief Bus & Fin Officer | 2025-01-10 18:11:32 | 132,000 0 | 132,000 | Form 4 |
| 6 | Moore Paul Andrew Chief Scientific Officer | 2025-01-10 18:07:57 | 132,000 0 | 132,000 | Form 4 |
| 7 | Smith Jeffrey T L EVP & Chief Medical Officer | 2025-01-10 18:03:11 | 132,000 0 | 132,000 | Form 4 |
| 8 | Astle Christopher SVP & Chief Financial Officer | 2024-01-08 18:14:29 | 107,503 0 | 107,503 | Form 4 |
| 9 | Landry Robert E Director | 2025-08-12 20:30:04 | 62,000 0 | 62,000 | Form 4 |
| 10 | Hillan Kenneth J. Director | 2023-12-08 17:17:20 | 37,000 0 | 37,000 | Form 4 |
| 11 | RENTON HOLLINGS Director | 2023-12-08 17:41:20 | 37,000 0 | 37,000 | Form 4 |
| 12 | Davidson Nancy Director | 2024-12-12 17:52:07 | 31,000 0 | 31,000 | Form 4 |
| 13 | Miller Derek John Michael Director | 2024-12-12 18:20:48 | 31,000 0 | 31,000 | Form 4 |
| 14 | Campoy Carlos Director | 2024-12-12 18:15:29 | 31,000 0 | 31,000 | Form 4 |
| 15 | Cesano Alessandra Director | 2024-12-12 18:01:25 | 31,000 0 | 31,000 | Form 4 |
| 16 | Neu Kelvin Director | 2024-12-12 17:56:02 | 31,000 0 | 31,000 | Form 4 |
| 17 | Cox Troy Director | 2024-12-12 17:52:00 | 31,000 0 | 31,000 | Form 4 |
| 18 | Mahony Susan Director | 2024-12-12 17:51:04 | 31,000 0 | 31,000 | Form 4 |
| 19 | Gallagher Neil Director | 2024-12-12 17:49:50 | 31,000 0 | 31,000 | Form 4 |
| 20 | Josephson Neil Chief Medical Officer | 2022-12-23 20:00:19 | 26,221 0 | 26,221 | Form 4/A |
| 21 | Sacks Natalie Director | 2022-12-23 19:00:37 | 25,000 0 | 25,000 | Form 4 |
| 22 | Zoth Lota S. Director | 2022-12-23 19:00:22 | 25,000 0 | 25,000 | Form 4 |
| 23 | Klompas Neil A President & COO | 2023-03-14 17:00:14 | 19,741 700 | 20,441 | Form 4 |
| 24 | Platshon Scott Director | 2024-03-04 12:05:32 | 0 0 | 0 | Form 3 |