Zymeworks Inc.
Ownership
Ownership Structure
Who owns Zymeworks Inc. (ZYME)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 92.8% of the shares are freely tradable; institutional investors hold 98.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| EcoR1 Capital, LLC | 32.12 | 22,970,388 | +0.0 | 06/30/2026 |
| Rubric Capital Management LP | 9.79 | 7,000,000 | +21.7 | 03/31/2026 |
| BlackRock Inc | 6.37 | 4,553,888 | -0.9 | 03/31/2026 |
| Perceptive Advisors LLC | 5.85 | 4,182,953 | +19.2 | 06/30/2026 |
| Bvf Inc | 5.22 | 3,734,142 | -5.2 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 3.47 | 2,480,568 | -4.3 | 03/31/2026 |
| BNP Paribas Investment Partners SA | 2.67 | 1,908,039 | +4.7 | 03/31/2026 |
| Vanguard Capital Management, LLC | 2.39 | 1,705,580 | +0.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| HBM Healthcare Investments AG Ord | 3.53 | 2,522,736 | +0.0 | 06/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 2.11 | 1,508,613 | +0.0 | 07/31/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: September 17, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.