Who owns Zymeworks Inc.?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of ZYME from SEC Form 13F filings across 201 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 201 institutions disclosed 68.2M shares of Zymeworks Inc. worth $1.78B — about 93.4% of shares outstanding; the largest disclosed holder is EcoR1 Capital, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
201
13F holders
$1.78B
value, 2026 filers
93.4%
of shares outstanding (68.2M sh)
25
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of ZYME's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | EcoR1 Capital, LLC | 23.0M | $600.4M | 29.2% | 31.5% | 0.0% |
| 2 | Rubric Capital Management LP | 7.0M | $183.0M | 1.7% | 9.6% | 0.0% |
| 3 | BlackRock, Inc. | 4.3M | $111.1M | 0.0% | 5.8% | -6.7% |
| 4 | PERCEPTIVE ADVISORS LLC | 4.2M | $109.3M | 1.6% | 5.7% | +19.2% |
| 5 | BVF INC/IL | 3.6M | $95.4M | 2.4% | 5% | -2.3% |
| 6 | MORGAN STANLEY | 2.2M | $58.3M | 0.0% | 3.1% | -10.1% |
| 7 | BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 1.8M | $46.6M | 0.0% | 2.4% | -6.7% |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 1.6M | $40.8M | 0.0% | 2.1% | -8.6% |
| 9 | Assenagon Asset Management S.A. | 1.3M | $32.7M | 0.0% | 1.7% | +72.0% |
| 10 | Nextech Invest Ltd. | 1.1M | $29.1M | 1.4% | 1.5% | 0.0% |
| 11 | STATE STREET CORP | 1.1M | $28.4M | 0.0% | 1.5% | +7.6% |
| 12 | DIMENSIONAL FUND ADVISORS LP | 994,955 | $26.0M | 0.0% | 1.4% | -12.7% |
| 13 | CITADEL ADVISORS LLC | 914,136 | $23.9M | 0.0% | 1.3% | -20.5% |
| 14 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC.NEW | 889,802 | $23.3M | 0.0% | 1.2% | new |
| 15 | FMR LLC | 702,568 | $18.4M | 0.0% | 1% | +5.3% |
| 16 | GEODE CAPITAL MANAGEMENT, LLC | 692,410 | $18.1M | 0.0% | 0.9% | +4.9% |
| 17 | Prosight Management, LP | 674,434 | $17.6M | 3.0% | 0.9% | +25.1% |
| 18 | Qube Research & Technologies Ltd | 593,590 | $15.5M | 0.0% | 0.8% | +15.9% |
| 19 | VANGUARD PORTFOLIO MANAGEMENT LLC | 510,032 | $13.3M | 0.0% | 0.7% | +2.0% |
| 20 | Redmile Group, LLC | 491,654 | $12.9M | 0.9% | 0.7% | 0.0% |
| 21 | Capricorn Fund Managers Ltd | 486,529 | $12.7M | 1.0% | 0.7% | -51.7% |
| 22 | GOLDMAN SACHS GROUP INC | 470,822 | $12.3M | 0.0% | 0.6% | -21.5% |
| 23 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 418,497 | $10.9M | 0.0% | 0.6% | -43.7% |
| 24 | DEUTSCHE BANK AG\ | 397,190 | $10.4M | 0.0% | 0.5% | -56.9% |
| 25 | Hillsdale Investment Management Inc. | 382,922 | $10.0M | 0.2% | 0.5% | +10.8% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.