Gregory Austin Ciongoli - 10 Aug 2025 Form 3 Insider Report for Zymeworks Inc. (ZYME)

Role
Director
Signature
/s/ Daniel Dex, Attorney-in-Fact
Issuer symbol
ZYME
Transactions as of
10 Aug 2025
Net transactions value
$0
Form type
3
Filing time
12 Aug 2025, 20:00:05 UTC
Next filing
12 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Ciongoli Gregory Austin Director C/O ZYMEWORKS INC., 108 PATRIOT DRIVE, SUITE A, MIDDLETOWN /s/ Daniel Dex, Attorney-in-Fact 12 Aug 2025 0002023732

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
holding ZYME Common Stock 73,500 10 Aug 2025 Direct
holding ZYME Common Stock 5,000 10 Aug 2025 See footnote F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding ZYME No securities are beneficially owned 10 Aug 2025 Not applicable 0 Direct F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Represents shares held by 4 Arrows Holdings, LLC, for which the reporting person is the manager. The reporting person exercises sole voting and dispositive power over these shares and disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
F2 Not applicable.

Remarks:

Exhibit List - Exhibit 24 - Power of Attorney