Institutional Ownership
Zymeworks Inc
CUSIP 98985Y108COMZYMEQ1 2026
13D / 13G Filings
37
Schedule 13D/13G on record
Beneficial Filers
13
Distinct reporting persons
Largest Stake
30.7%
Max % of class reported
Institutional Holders
204
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
37 filings · latest Feb 13, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 13, 2026 | Rubric Capital Management LP | 13G/A | 7.7% | 5.75M | SEC |
| 2 | Feb 12, 2026 | Morgan Stanley | 13G/A | 3.4% | 2.52M | SEC |
| 3 | Nov 19, 2025 | Ecor1 Capital, LLC | 13D/A | 30.7% | — | SEC |
| 4 | Nov 14, 2025 | Redmile Group, LLC | 13G/A | 4.9% | 37.06M | SEC |
| 5 | Nov 14, 2025 | Biotechnology Value Fund L P | 13G/A | 5.2% | 3.94M | SEC |
| 6 | Aug 14, 2025 | Redmile Group, LLC | 13G/A | 5.6% | 4.15M | SEC |
| 7 | Jul 16, 2025 | Blackrock, Inc. | 13G/A | 4.8% | 3.56M | SEC |
| 8 | Jun 27, 2025 | Ecor1 Capital, LLC | 13D | 30.7% | — | SEC |
| 9 | May 7, 2025 | Morgan Stanley | 13G/A | 5.8% | 4.06M | SEC |
| 10 | Apr 8, 2025 | Ecor1 Capital, LLC | 13D/A | 25.4% | — | SEC |
27 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Zymeworks Inc.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Ecor1 Capital, LLC | 22.97M | $575.18M |
| 2 | Rubric Capital Management LP | 7.00M | $175.28M |
| 3 | Blackrock, Inc. | 4.55M | $114.03M |
| 4 | Bvf Inc/Il | 3.73M | $93.50M |
| 5 | Perceptive Advisors LLC | 3.51M | $87.89M |
| 6 | Morgan Stanley | 2.48M | $62.11M |
| 7 | Bnp Paribas Asset Management Holding S.A. | 1.91M | $47.78M |
| 8 | Citadel Advisors LLC | 1.15M | $28.80M |
| 9 | Dimensional Fund Advisors LP | 1.14M | $28.52M |
| 10 | Nextech Invest, Ltd. | 1.11M | $27.89M |