[Form 3] Zymeworks Inc. Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Zymeworks Inc. director Robert E. Landry filed an initial Form 3 reporting that he does not beneficially own any shares or derivative securities of the company. The filing identifies Mr. Landry as a director and indicates the submission covers a single reporting person. No transactions, grants, or indirect ownership arrangements are disclosed in the form.

Positive

• Initial disclosure filed by director Robert E. Landry
• No securities reported (reported beneficial ownership: 0 shares and 0 derivatives)

Negative

• None.

Insights

Corporate Governance Analyst

Director filed a Form 3 reporting no holdings in Zymeworks.

The Form 3 names Robert E. Landry as a director and records 0 shares and 0 derivative securities beneficially owned. This means the initial ownership disclosure shows no direct or indirect economic exposure disclosed on this form.

This filing is procedural and contains no disclosed transactions, grants, or changes to ownership that would affect insider alignment with shareholders.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Landry Robert E

(Last) (First) (Middle)

C/O ZYMEWORKS INC.

108 PATRIOT DRIVE, SUITE A

(Street)

MIDDLETOWN DE 19709

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
08/10/2025

3. Issuer Name and Ticker or Trading Symbol
Zymeworks Inc. [ ZYME ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
No securities are beneficially owned	0	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
No securities are beneficially owned	(1)	(1)	Not applicable	0	(1)	D

Explanation of Responses:

1. Not appllicable.

Remarks:

Exhibit List - Exhibit 24 - Power of Attorney

	/s/ Daniel Dex, Attorney-in-Fact	08/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Zymeworks (ZYME) Form 3 filed by Robert E. Landry report?

The form reports that Robert E. Landry, identified as a director, beneficially owns 0 shares and 0 derivative securities of Zymeworks.

Is the Form 3 from Zymeworks indicative of any stock transactions by the director?

No. The Form 3 discloses no transactions, grants, or ownership; it reports no beneficial ownership on this filing.

Was the Form 3 filed by multiple reporting persons for Zymeworks (ZYME)?

No. The filing indicates it was submitted by one reporting person.

Does the Form 3 show any indirect ownership or power of attorney remarks?

The form shows no indirect ownership. The exhibit list includes an Exhibit 24 Power of Attorney but no indirect beneficial ownership is disclosed.