Security key
98985Y108
Zymeworks Inc. - Common Stock, $0.00001 par value per share (ZYME)
CUSIP: 98985Y108
Q2 2023 13F Holders as of 30 Jun 2023
- Security type / class
- Equity / Common Stock, $0.00001 par value per share
- Total 13F shares
- 63,418,288
- Total 13F value
- $547,948,381
- Share change
- +6,481,767
- Put/Call ratio
- 102%
- SEC-reported price per share
- $8.64
- Number of holders
- 135
- Value change
- +$55,194,956
- Number of buys
- 87
- Number of sells
- 64
- Shares outstanding
- 73,761,855
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2023
Institutions
135
Top holders
10
ZYME full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2023
Previous quarter: Q1 2023
Zymeworks Inc. SEC filings
Zymeworks Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 98985Y108
Recent filing periods:
Ownership snapshot
Top reported holders of ZYME - Zymeworks Inc. - Common Stock, $0.00001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
EcoR1 Capital, LLC
Disclosed value leader
EcoR1 Capital, LLC
Comparable rows
15/15
Latest evidence
31 Mar 2023
13F
3/4/5
Lead comparable stake: 14%
Showing 1-6 of 15 holder rows.
Quick read
EcoR1 Capital, LLC leads the comparable SEC ownership view at 14%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens EcoR1 Capital, LLC's linked filing trail.
Comparable ownership
Top 5
EcoR1 Capital, LLC
14%
Redmile Group, LLC
8.2%
BVF INC/IL
8%
MORGAN STANLEY
7.5%
PERCEPTIVE ADVISORS LLC
4.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC |
13F
Company
|
14%
|
$91,190,756
10,087,473 shares
|
— | 31 Mar 2023 |
| Redmile Group, LLC |
13F
3/4/5
Company · 10%+ Owner
|
8.2%
|
$54,853,979
6,067,918 shares
|
— | 31 Mar 2023 |
| BVF INC/IL |
13F
Company
|
8%
|
$53,064,800
5,870,000 shares
|
— | 31 Mar 2023 |
| MORGAN STANLEY |
13F
Company
|
7.5%
|
$50,292,242
5,563,301 shares
|
— | 31 Mar 2023 |
| PERCEPTIVE ADVISORS LLC |
13F
Company
|
4.6%
|
$30,541,621
3,378,498 shares
|
— | 31 Mar 2023 |
| Rubric Capital Management LP |
13F
Company
|
3.9%
|
$25,806,777
2,854,732 shares
|
— | 31 Mar 2023 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2023
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
135
Shares
63,418,288
Rows available
135
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2023 vs Q1 2023 Across Filers
Q1 2023 holders
113
Q2 2023 holders
135
Holder diff
22
| Investor | Q1 2023 Shares | Q2 2023 Shares | Share Diff | Share Chg % | Q1 2023 value | Q2 2023 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend