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IDEAYA Biosciences (IDYA) investor relations material

IDEAYA Biosciences Evercore ISI 8th Annual HealthCONx Conference summary

Complete event summary combining all related documents: earnings call transcript, report, and slide presentation.
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Evercore ISI 8th Annual HealthCONx Conference summary3 Dec, 2025

Pipeline and clinical development updates

  • Lead program Darovasertib is nearing a key randomized median PFS readout for metastatic uveal melanoma, with potential accelerated approval filing in the U.S. expected by year-end or early next year.

  • Full enrollment for the median OS component in the registrational study is nearly complete, targeting over 450 patients.

  • Additional registrational trials for Darovasertib include a phase 3 neoadjuvant trial (sites activated, patients screening) and a phase 3 adjuvant trial launching in the first half of next year.

  • Breakthrough therapy designation was received for the neoadjuvant indication based on strong eye preservation data.

  • Multiple clinical assets in the MTAP pathway are advancing, including phase 2 MAT2A inhibitor, phase 1 PRMT5 inhibitor, and a new program targeting CDKN2A co-alteration.

Clinical data and patient impact

  • In uveal melanoma, there are no approved systemic therapies for neoadjuvant or adjuvant settings, and most metastatic patients lack approved options.

  • Neoadjuvant trial aims to exceed a 10% eye preservation rate; recent data show the majority of patients preserving their eyes, supporting breakthrough designation.

  • Plaque therapy cohort targets a 20% or greater improvement in vision (15-letter BCVA test) versus control, with secondary endpoints for event-free survival.

  • Neoadjuvant treatment showed a mean 14-letter vision gain pre-procedure, potentially improving outcomes post-radiotherapy.

ADC and targeted therapy programs

  • DLL3 topo ADC in small cell lung cancer showed a 70% confirmed response rate at 2.4 mg/kg and a PFS of 6.7 months, with grade 3+ AEs under 20%.

  • Dose intensity is critical for efficacy; discontinuations and dose interruptions were infrequent.

  • Plans to develop DLL3 ADC in both small cell lung cancer and neuroendocrine tumors, with additional data updates expected next year.

  • Resistance to DLL3 therapies is not expected to arise from antigen downregulation due to its link to ASCL1; distinct binding epitopes may allow for combination strategies.

Darovasertib PFS: What's the commercialization path
DLL3 ADC: Resistance mechanisms and differentiation
PARG: How amplify topo ADC durability
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Frequently asked questions

IDEAYA Biosciences Inc. is a clinical-stage biotechnology firm primarily engaged in the discovery and development of precision medicine therapeutics for cancer patients. The company's research focuses on synthetic lethality, an innovative class of precision medicine targets, aiming to produce therapeutics that are first-in-class and/or best-in-class. IDEAYA Biosciences leverages molecular diagnostics to select patient populations for its targeted therapies, emphasizing an integrated approach to the discovery and development of biomarkers and therapeutics. This approach spans early discovery through clinical development, targeting unmet needs in cancer treatment. The company is headquartered in South San Francisco, California, and its shares are listed on the NASDAQ.

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