Zymeworks Inc. — Director's Dealing 2024

Dec 26, 2024

SEC Form 4/A — Form 4/A

Issuer: Zymeworks Inc. (ZYME)
CIK: 0001937653
Period of Report: 2024-12-19

Reporting Person: EcoR1 Capital, LLC (Director, 10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2024-12-19	Common Stock	P	298818	$13.5289	Acquired	13736291	Indirect
2024-12-20	Common Stock	P	704488	$14.0776	Acquired	14440779	Indirect
2024-12-23	Common Stock	P	251502	$14.2508	Acquired	14692281	Indirect

Footnotes

F1: This transaction was inadvertently omitted from the Form 4 filed on 12/23/2024.

F2: The reporting persons are EcoR1 Capital, LLC ("EcoR1"), Oleg Nodelman and EcoR1 Capital Fund Qualified, L.P. ("Qualified Fund"). EcoR1 is the general partner and investment adviser of private funds, including Qualified Fund (the "Funds"). Mr. Nodelman is the manager and controlling owner of EcoR1. EcoR1 is filing this Form 4 for itself, Mr. Nodelman and Qualified Fund. The filers are filing this Form 4 jointly, but not as a group, and each expressly disclaims membership in a group within the meaning of Rule 13d-5(b) under the Securities Exchange Act of 1934. The Funds hold these securities directly for the benefit of their investors. EcoR1 may be deemed to indirectly beneficially own them as the investment adviser to the Funds. Mr. Nodelman may be deemed to indirectly beneficially own them as the control person of EcoR1. The filers disclaim beneficial ownership of the securities except to the extent of their respective pecuniary interests therein.

F3: Qualified Fund purchased 281,218 of the shares purchased in this transaction.

F4: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.3758 to $13.58, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes 4, 7 and 10.

F5: After this transaction, Qualified Fund held 12,939,442 shares of the Issuer's Common Stock.

F6: Qualified Fund purchased 662,995 of the shares purchased in this transaction.

F7: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.6517 to $14.1388, inclusive.

F8: After this transaction, Qualified Fund held 13,602,437 shares of the Issuer's Common Stock.

F9: Qualified Fund purchased 236,691 of the shares purchased in this transaction.

F10: The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $14.1957 to $14.2713, inclusive.

F11: After this transaction, Qualified Fund held 13,839,128 shares of the Issuer's Common Stock.