Zymeworks Inc. - ZYME
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| May 15, 2026 | SCHEDULE 13G/A | Rubric Capital Management LP | 9.49% | 7,000,000 | View |
| May 15, 2026 | SCHEDULE 13G/A | David Rosen | 9.49% | 7,000,000 | View |
| Apr 15, 2026 | SCHEDULE 13G | Perceptive Advisors LLC | 5.4% | 3,974,579 | View |
| Apr 15, 2026 | SCHEDULE 13G | Joseph Edelman | 5.4% | 3,974,579 | View |
| Apr 15, 2026 | SCHEDULE 13G | Perceptive Life Sciences Master Fund, Ltd. | 5.4% | 3,974,579 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | Rubric Capital Management LP | 7.68% | 5,750,000 | View |
| Feb 13, 2026 | SCHEDULE 13G/A | David Rosen | 7.68% | 5,750,000 | View |
| Feb 12, 2026 | SCHEDULE 13G/A | Morgan Stanley | 3.4% | 2,519,243 | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.