January 2026 Improving Lives Through Transformative Precision Medicines JPM 2026 | 44th Annual Healthcare Conference NASDAQ: IDYA Safe Harbor Statement Certain statements in this presentation and the accompanying oral commentary are forward-looking statements. These statements relate to future events or the future financial performance of IDEAYA Biosciences, Inc. (the "Company") and involve known and unknown risks, uncertainties and other factors that may cause the actual results, levels of activity, perfor ...

Financial Data and Key Metrics Changes - The company is approaching top line results for its lead program, darovasertib, with guidance for an accelerated approval filing in the U.S. by year-end this year to Q1 next year [3][4] - Historical median progression-free survival (PFS) for metastatic uveal melanoma is about 2-3 months, while the company has reported a PFS of approximately 7 months in its trials, indicating a significant improvement [6][7] Business Line Data and Key Metrics Changes - The company has eight programs in clinical development, with darovasertib being the lead program in a registrational trial for metastatic uveal melanoma [3] - The company has received breakthrough therapy designation for darovasertib in the neoadjuvant setting, indicating a strong pipeline and potential for accelerated development [4] Market Data and Key Metrics Changes - The market for darovasertib targets approximately 4,000-5,000 patients, with a significant portion being HLA negative, which the company aims to address [9] - The annual incidence of neoadjuvant uveal melanoma is estimated to be 10,000-12,000 patients, highlighting a substantial unmet need in this area [12] Company Strategy and Development Direction - The company is focusing on expanding its pipeline in the MTAP deletion space, with a phase two MAT2A inhibitor and a phase one PRMT5 inhibitor, aiming to position itself as a leader in this competitive area [36] - The company is also exploring the DLL3 program for small cell lung cancer, with plans to differentiate based on efficacy and durability compared to competitors [53] Management's Comments on Operating Environment and Future Outlook - Management expressed confidence in the upcoming data readouts, particularly for darovasertib, and believes that the combination of strong efficacy data and a robust pipeline will position the company favorably in the market [19][20] - The company is optimistic about the potential for its adjuvant study to become a blockbuster opportunity, targeting patients earlier in their treatment journey [29] Other Important Information - The company is preparing to initiate an adjuvant study in collaboration with Servier, targeting high and high medium metastatic risk populations [27] - The company has a unique bispecific ADC targeting B7-H3 and PTK7, which is expected to amplify efficacy in dual expression populations [66] Q&A Session Summary Question: What is the expected timeline for the neoadjuvant study? - The company anticipates enrolling the study in roughly five quarters, with the first eye preservation data expected in about six months [19][20] Question: How does the company plan to differentiate its DLL3 program? - The company believes it can differentiate based on response rates and durability, leveraging a unique linker system that allows for higher dosing [53][54] Question: What is the competitive landscape for the MTAP deletion space? - The company sees itself as an industry leader in the MTAP deletion area, with a diverse pipeline that includes multiple clinical stage assets [36][37]

Core Insights - IDEAYA Biosciences has submitted an IND application to the FDA for IDE892, a potential best-in-class MTA-cooperative inhibitor of PRMT5, targeting MTAP-deleted lung cancer [1][2] - The company plans to initiate a Phase 1 dose escalation trial for IDE892 in Q4 2025 and aims to start combination trials with IDE397 in H1 2026 [1][6] Company Overview - IDEAYA is focused on precision medicine in oncology, developing transformative therapies for cancer through small-molecule drug discovery, structural biology, and bioinformatics [4] - The company has a robust pipeline targeting synthetic lethality and antibody-drug conjugates for molecularly defined solid tumor indications [4] Market Opportunity - Approximately 15-20% of non-small cell lung cancer (NSCLC) cases are MTAP-deleted, presenting a significant unmet need for targeted therapies [2] - The combination of IDE892 and IDE397 is expected to enhance anti-tumor activity, creating a promising combination therapy opportunity [2][3] Upcoming Events - IDEAYA will present the preclinical profile of IDE892 and its combination rationale with IDE397 at the 10-Year Anniversary R&D Day on September 8, 2025 [6]

Core Insights - IDEAYA Biosciences has initiated a Phase 1/2 expansion clinical trial for IDE397, a potential first-in-class MAT2A inhibitor, in combination with Gilead's Trodelvy for treating MTAP-deletion urothelial cancer based on preliminary safety and efficacy data [1][10]. Company Overview - IDEAYA Biosciences is focused on precision medicine in oncology, aiming to discover and develop targeted therapeutics using molecular diagnostics to identify patient populations that would benefit most from its therapies [8]. Clinical Development - The combination of IDE397 and Trodelvy is being explored due to the high unmet medical need in MTAP-deletion urothelial cancer, where no approved therapies currently exist [3]. - The prevalence of MTAP-deletion in urothelial cancer is estimated to be around 26% [2][10]. - A clinical program update regarding the IDE397 and Trodelvy combination is expected in 2025, alongside other studies for IDE397 as a monotherapy in MTAP-deletion non-small cell lung cancer (NSCLC) and urothelial cancer [5]. Collaboration and Rights - IDEAYA and Gilead retain commercial rights to their respective compounds under a clinical study collaboration and supply agreement, with IDEAYA acting as the study sponsor [6].