Zentalis® Pharmaceuticals, Inc. (Nasdaq: ZNTL), a clinical oncology innovator advancing late-stage development of investigational first-in-class WEE1 inhibitor azenosertib as a biomarker-driven treatment approach for ovarian cancer, today presented results from an interim analysis of the DENALI Part 1b study (GOG-3066) as of a May 22, 2026 data cutoff, including the first overall survival analysis for azenosertib, at the European Society for Medical Oncology (ESMO) Congress 2026 in Madrid, Spain.

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