(1) | All securities being registered will be issued by Zymeworks Delaware Inc., a Delaware corporation (“Parent”). The reorganization transactions described in this registration statement and the enclosed proxy statement/prospectus (the “Reorganization”), will include, among others, (i) the issuance to Zymeworks Shareholders (as defined in the registration statement), at their election and subject to applicable eligibility criteria, for each Zymeworks Common Share (as defined in the registration statement), either (a) one share of Parent common stock, par value $0.00001 per share (the “Delaware Common Stock”) or (b) one exchangeable share (the “Exchangeable Shares” and recipients thereof, the “Exchangeable Shareholders”) in the capital of Zymeworks ExchangeCo Ltd., a company existing under the laws of the Province of British Columbia and a direct, wholly-owned subsidiary of Callco (“ExchangeCo”), subject to a cap on the aggregate number of Exchangeable Shares that is equal to 18% of (1) the number of Zymeworks Common Shares issued and outstanding, less (2) the number of Zymeworks Common Shares held by any Zymeworks Shareholders who exercise their Dissent Rights, (the “Exchangeable Share Cap”); (ii) the entry by Parent, Zymeworks CallCo ULC, an unlimited liability company existing under the laws of the Province of British Columbia and a direct, wholly-owned subsidiary of Parent (“Callco”) and ExchangeCo into the Exchangeable Share Support Agreement (the “Support Agreement”); and (iii) the entry by Parent, ExchangeCo, Callco and Computershare Trust Company of Canada, a trust company existing under the laws of Canada (the “Share Trustee”) into the Voting and Exchange Trust Agreement (the “Trust Agreement”) for the benefit of the Exchangeable Shareholders. After the Reorganization is complete, Zymeworks Shareholders will hold one share of |