Zymeworks Inc. · NASDAQ:ZYME
Zymeworks Inc. shareholders
As of Jun 30, 2026, 195 institutions reported holding Zymeworks Inc., 98.1% of its shares. Largest: EcoR1 Capital, LLC, Rubric Capital Management LP and BlackRock. New holders, exits, insiders and big stakes, each with its filing.
| Holder | Shares | % of Zymeworks Inc. | Change | Filed |
|---|---|---|---|---|
| EcoR1 Capital, LLC | 23M | 32.4% | no change | Aug 14, 2026 |
| Rubric Capital Management LP | 7M | 9.9% | no change | Aug 14, 2026 |
| BlackRock | 4.25M | 6.0% | −303K | Aug 7, 2026 |
| Perceptive Advisors LLC | 4.18M | 5.9% | +673K | Aug 14, 2026 |
| Bvf Inc | 3.65M | 5.1% | −85,000 | Aug 14, 2026 |
| Assenagon Asset Management S.A. | 2.5M | 3.5% | +1.78M | Aug 21, 2026 |
| Morgan Stanley | 2.23M | 3.1% | −249K | Aug 13, 2026 |
| Vanguard | 2.19M | 3.1% | −141K | Aug 13, 2026 |
| BNP Paribas | 1.8M | 2.5% | −132K | Aug 13, 2026 |
| Nextech Invest Ltd. | 1.11M | 1.6% | no change | Aug 14, 2026 |