On February 22, 2024, the board of directors of Zymeworks Inc., upon recommendation from the nominating and corporate governance committee of the Board, appointed Mr. Scott Platshon, Partner of EcoR1, as a director of the Company, effective as of February 22, 2024. Mr. Platshon was appointed as a Class III director with a term expiring at the Company?s 2024 annual general meeting of stockholders. Mr. Platshon will not be named to any committees of the Board in connection with his appointment.