🕵️ Zymeworks Inc. ($ZYME)
SEC insider & ownership activity, last 12 months · CIK 1937653 · every row links its SEC filing
Insider sell value was withheld pending verification over the last 12 months. No red-flag 8-Ks in the window.
Insider flow
0 buyers, $0 (0 lots) · 4 sellers, value withheld pending verification (10 lots)
| Insider | Buys | Bought | Sells | Sold | Last |
|---|---|---|---|---|---|
| Jeffrey T. L. Smith | 0 | – | 2 | value withheld pending verification | Jan 12, 2026 |
| Kenneth Galbraith | 0 | – | 4 | value withheld pending verification | Jan 12, 2026 |
| Mark Hollywood | 0 | – | 1 | value withheld pending verification | Jan 12, 2026 |
| Paul Andrew Moore | 0 | – | 3 | value withheld pending verification | Jan 12, 2026 |
5%+ holders
| Holder | Stake | Class | Schedule | Event | |
|---|---|---|---|---|---|
| ECOR1 Capital, LLC | 30.7% | 13D | Nov 16, 2025 | filing ↗ | |
| Oleg Nodelman | 30.7% | 13D | Nov 16, 2025 | filing ↗ | |
| ECOR1 Capital Fund Qualified, L.P. | 28.8% | 13D | Nov 16, 2025 | filing ↗ | |
| ECOR1 Capital, LLC | 21.3% | 13D | Dec 19, 2024 | filing ↗ | |
| Oleg Nodelman | 21.3% | 13D | Dec 19, 2024 | filing ↗ | |
| ECOR1 Capital Fund Qualified, L.P. | 20.1% | 13D | Dec 19, 2024 | filing ↗ | |
| Rubric Capital Management LP | 9.5% | 13G | May 15, 2026 | filing ↗ | |
| David Rosen | 9.5% | 13G | May 15, 2026 | filing ↗ | |
| Perceptive Advisors LLC | 5.4% | 13G | Apr 15, 2026 | filing ↗ | |
| Joseph Edelman | 5.4% | 13G | Apr 15, 2026 | filing ↗ | |
| Perceptive Life Sciences Master Fund, Ltd. | 5.4% | 13G | Apr 15, 2026 | filing ↗ | |
| BVF Partners L P/IL | 5.2% | 13G | Nov 14, 2025 | filing ↗ | |
| BVF INC/IL | 5.2% | 13G | Nov 14, 2025 | filing ↗ | |
| Mark N. Lampert | 5.2% | 13G | Nov 14, 2025 | filing ↗ |
Planned insider sales (Form 144)
| Seller | Planned | Approx. sale date | |
|---|---|---|---|
| Jeffrey T. L. Smith | $6.1M | Mar 6, 2026 | filing ↗ |
| Leone D. Patterson | $715K | Feb 17, 2026 | filing ↗ |
| Leone D. Patterson | $3.0M | Feb 13, 2026 | filing ↗ |
| Leone D. Patterson | $158K | Jan 12, 2026 | filing ↗ |
| Jeffrey T. L. Smith | $216K | Jan 12, 2026 | filing ↗ |
| Paul Andrew Moore | $222K | Jan 12, 2026 | filing ↗ |
| Mark Hollywood | $142K | Jan 12, 2026 | filing ↗ |
| Kenneth Galbraith | $705K | Jan 12, 2026 | filing ↗ |
| Smith Jeffrey T. L. | $281K | Jan 5, 2026 | filing ↗ |
| Kenneth Galbraith | $1.4M | Jan 5, 2026 | filing ↗ |
| Paul Andrew Moore | $535K | Jan 5, 2026 | filing ↗ |
| Galbraith, Kenneth | $1.3M | Dec 22, 2025 | filing ↗ |
| Derek John Michael Miller | $2.8M | Nov 24, 2025 | filing ↗ |
| Neil Gallagher | $2.5M | Nov 21, 2025 | filing ↗ |
Material events (8-K)
| Item | Event date | |
|---|---|---|
| Reg FD disclosure (7.01) | Aug 25, 2026 | filing ↗ |
| Other events (8.01) | Aug 25, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 25, 2026 | filing ↗ |
| Earnings (2.02) | Aug 6, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Aug 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Aug 6, 2026 | filing ↗ |
| Material agreement (1.01) | Jun 28, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Jun 28, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jun 28, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 14, 2026 | filing ↗ |
| Other events (8.01) | May 14, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 14, 2026 | filing ↗ |
| Earnings (2.02) | May 7, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | May 7, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | May 7, 2026 | filing ↗ |
| Officer/director changes (5.02) | Mar 31, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 31, 2026 | filing ↗ |
| Earnings (2.02) | Mar 2, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 2, 2026 | filing ↗ |
| Material agreement (1.01) | Mar 2, 2026 | filing ↗ |
| New financial obligation (2.03) | Mar 2, 2026 | filing ↗ |
| Reg FD disclosure (7.01) | Mar 2, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Mar 2, 2026 | filing ↗ |
| Earnings (2.02) | Jan 6, 2026 | filing ↗ |
| Officer/director changes (5.02) | Jan 6, 2026 | filing ↗ |
| Other events (8.01) | Jan 6, 2026 | filing ↗ |
| Financial Statements and Exhibits (9.01) | Jan 6, 2026 | filing ↗ |
| Shareholder vote (5.07) | Dec 30, 2025 | filing ↗ |
| Other events (8.01) | Nov 17, 2025 | filing ↗ |