Gregory A. Ciongoli - 11 Aug 2025 Form 4 Insider Report for Zymeworks Inc. (ZYME)

Reporting relationship: Director
Issuer ticker: ZYME
Reported as of: 11 Aug 2025
Net transaction value: +$4,988,300
SEC form: 4
Accepted by SEC: 12 Aug 2025, 20:30:06 UTC
Prior SEC filing: 12 Aug 2025
Next SEC filing: 12 Jan 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Dex, Attorney-in-Fact

Key filing fact

Gregory A. Ciongoli filed Form 4 for Zymeworks Inc. (ZYME) on 12 Aug 2025.

Key facts

This page summarizes Gregory A. Ciongoli's Form 4 filing for Zymeworks Inc. (ZYME).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 12 Aug 2025, 20:30.

Change

Previous filing in this sequence was filed on 12 Aug 2025.
Current net transaction value: +$4,988,300.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002023732 Primary reporting owner

Ciongoli Gregory Austin

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

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

ZYME transaction

Common Stock

Award

Transaction value: $4,988,300
Shares: +415,000
Change %: +565%
Price: $12.02
Shares after: 488,500
Date: 12 Aug 2025
Ownership: Direct

ZYME holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,000
Date: 11 Aug 2025
Ownership: See footnote
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

ZYME transaction Derivative

Stock Option (Right to Buy)

Award

Transaction value: $0
Shares: +62,000
Change %
Price: $0.000000
Shares after: 62,000
Date: 11 Aug 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 62,000
Exercise price: $12.44
Footnotes: F2

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote 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.

Footnote F2

Stock options vest in 36 equal monthly installments starting one month after grant date of August 11, 2025.