3Q 2025 Results Conference Call and Webcast November 6, 2025 Nasdaq: ZYME | zymeworks.com Legal Disclaimer This presentation and the accompanying oral commentary include "forward-looking statements" or information within the meaning of the applicable securities legislation, including Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Forward-looking statements in this presentation and the accompanying oral commentary include, but are no ...

Core Insights - Zymeworks Inc. reported financial results for Q3 and nine months ended September 30, 2025, highlighting progress in clinical trials and financial performance [1][13]. Clinical Highlights - Initial Phase 1 clinical data for ZW191, an antibody-drug conjugate (ADC) targeting folate receptor-α, showed promising results, with objective response rates of 53% overall and 64% for gynecological cancers [3][8]. - The Phase 1 trial for ZW251, targeting GPC3 for hepatocellular carcinoma, has commenced with the first patient dosed [5][7]. - Dose optimization for ZW191 is set to begin in Q4 2025, focusing on safety and efficacy at doses of 6.4 mg/kg and 9.6 mg/kg [4]. Business Updates - The company achieved a $25 million development milestone from Johnson & Johnson in Q3 2025, reflecting ongoing clinical progress [9]. - Zymeworks earned $1 million in royalties from Ziihera® net product sales during Q3 2025 [7][9]. - As of September 30, 2025, Zymeworks had cash resources of $299.4 million, down from $324.2 million at the end of 2024, providing a cash runway into the second half of 2027 [14]. Financial Performance - Total revenue for Q3 2025 was $27.6 million, up from $16 million in Q3 2024, primarily due to higher milestone revenue [13]. - Research and development expenses were $35.6 million in Q3 2025, slightly down from $36.4 million in Q3 2024 [13]. - The net loss for Q3 2025 was $19.6 million, an improvement from a net loss of $29.9 million in Q3 2024 [13][19]. Leadership and Strategic Initiatives - Zymeworks appointed Dr. Adam Schayowitz as Acting Chief Development Officer to enhance R&D and business development efforts [11]. - The company completed $22.7 million in share repurchases as part of its strategic program, aimed at enhancing shareholder value [12][13].