EcoR1 Capital, LLC - 16 Nov 2025 SCHEDULE 13D/A Report for Zymeworks Inc. Common Stock (ZYME)

Filing Manager
EcoR1 Capital, LLC
Reporting Manager
EcoR1 Capital, LLC
Security
Zymeworks Inc. Common Stock
Symbol
ZYME
Shares outstanding
74,822,111 shares
Disclosed Ownership
22,970,388 shares
Ownership
30.7%
Form type
SCHEDULE 13D/A
Filing time
19 Nov 2025, 17:39:39 UTC
Date of event
16 Nov 2025
Previous filing
27 Jun 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
EcoR1 Capital, LLC 30.7% 22,970,388 0 22,970,388 /s/ Oleg Nodelman Manager 0001587114
Oleg Nodelman 30.7% 22,970,388 0 22,970,388 /s/ Oleg Nodelman Reporting person 0001454385
EcoR1 Capital Fund Qualified, L.P. 28.8% 21,582,563 0 21,582,563 /s/ Oleg Nodelman Manager of the General Partner, EcoR1 Capital, LLC 0001598292