CytomX Therapeutics to Report Fourth Quarter and Full Year 2023 Financial Results on March 11, 2024

CytomX Therapeutics, Inc. (Nasdaq: CTMX), a leader in the field of conditionally activated, localized biologics, today announced that it will report full year 2023 financial results on Monday, March 11, 2024, after the close of U.S. markets. Following the announcement, the Company will host a conference call and webcast at 5:00 p.m. ET / 2:00 p.m. PT.

Participants may access the live webcast of the conference call from the Events and Presentations page of CytomX’s website at https://ir.cytomx.com/events-and-presentations. Participants may register for the conference call here and are advised to do so at least 10 minutes prior to joining the call. An archived replay of the webcast will be available on the Company’s website.

About CytomX Therapeutics, Inc.CytomX is a clinical-stage, oncology-focused biopharmaceutical company focused on developing novel conditionally activated biologics designed to be localized to the tumor microenvironment. By pioneering a novel pipeline of localized biologics, powered by its Probody® therapeutic platform, CytomX’s vision is to create safer, more effective therapies for the treatment of cancer. CytomX’s robust and differentiated pipeline comprises therapeutic candidates across multiple treatment modalities including antibody-drug conjugates (“ADCs”), T-cell engagers, and immune modulators such as cytokines and checkpoint inhibitors. CytomX’s clinical-stage pipeline includes CX-904, CX-2051 and CX-801. CX-904 is a conditionally activated T-cell-engaging antibody targeting the epidermal growth factor receptor (EGFR) on tumor cells and the CD3 receptor on T cells and partnered with Amgen in a global co-development alliance. CX-2051 is a conditionally activated ADC directed toward epithelial cell adhesion molecule, EpCAM, with potential applicability across multiple EpCAM-expressing epithelial cancers. CX-801 is an interferon alpha-2b Probody cytokine with broad potential applicability in traditionally immuno-oncology sensitive as well as insensitive (cold) tumors. BMS-986288, partnered with Bristol Myers Squibb, is a conditionally activated CTLA-4-targeting antibody based on a non-fucosylated version of ipilimumab. CytomX has established strategic collaborations with multiple leaders in oncology, including Amgen, Astellas, Bristol Myers Squibb, Regeneron and Moderna. For more information about CytomX and how it is working to make conditionally activated treatments the new standard-of-care in the fight against cancer, visit www.cytomx.com and follow us on LinkedIn and X (formerly Twitter).

Probody is a U.S. registered trademark of CytomX Therapeutics, Inc.

CytomX Contact:Chris OgdenSVP, Finance and Accounting [e-mail] Direct: [phone]

Investor and Media Contact:Stern Investor RelationsStephanie [e-mail]212-362-1200