IDEAYA Biosciences to Participate in Upcoming December 2025 Investor Relations Events

• Fireside chat with Yujiro S. Hata, President and Chief Executive Officer, hosted by Yigal D. Nochomovitz, Ph.D., Director, SMid Cap Biotech Analyst

8th Annual Evercore Healthcare Conference
Wednesday, December 3rd, 2025 at 10:50 AM ET

• Fireside chat with Yujiro S. Hata, President and Chief Executive Officer, hosted by Jonathan Miller, Managing Director, Biotech and Pharma Equity Research

A live audio webcast of the conference events, as permitted by the conference host, will be available at the "Investors/Events" section of the IDEAYA website at https://ir.ideayabio.com/events and/or through the conference host. A replay of available webcasts will be accessible for 30 days following the live event.

About IDEAYA Biosciences

IDEAYA is a precision medicine oncology company committed to the discovery, development, and commercialization of transformative therapies for cancer. Our approach integrates expertise in small-molecule drug discovery, structural biology and bioinformatics with robust internal capabilities in identifying and validating translational biomarkers to develop tailored, potentially first-in-class targeted therapies aligned to the genetic drivers of disease. We have built a deep pipeline of product candidates focused on synthetic lethality and antibody-drug conjugates, or ADCs, for molecularly defined solid tumor indications. Our mission is to bring forth the next wave of precision oncology therapies that are more selective, more effective, and deeply personalized with the goal of altering the course of disease and improving clinical outcomes for patients with cancer.

Forward-Looking Statements

This press release contains forward-looking statements, including, but not limited to, statements related to participation in and/or presentation at certain investor relations events. IDEAYA undertakes no obligation to update or revise any forward-looking statements. For a further description of the risks and uncertainties that could cause actual results to differ from those expressed in these forward-looking statements, as well as risks relating to the business of IDEAYA in general, see IDEAYA's current and future filings with the U.S. Securities and Exchange Commission, including its Annual Report on Form 10-K filed on February 18, 2025.

Investor and Media Contact
IDEAYA Biosciences
Joshua Bleharski, Ph.D.
Chief Financial Officer
investor@ideayabio.com

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SOURCE IDEAYA Biosciences, Inc.