On August 31, 2026 PMV Pharmaceuticals, Inc. ("PMV Pharma" or the "Company"; Nasdaq: PMVP), a precision oncology company pioneering the discovery and development of small molecule therapies targeting p53, reported updated interim ovarian cancer data from the Phase 2 pivotal portion of the PYNNACLE clinical trial. The multicenter, single-arm, registrational Phase 2 trial is assessing rezatapopt as monotherapy at a dose of 2000 mg once-daily in patients with TP53 Y220C advanced solid tumors.

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Enrollment of platinum-resistant/refractory ovarian cancer patients for the primary analysis in the Phase 2 monotherapy portion of the PYNNACLE Phase 2 pivotal trial has been completed. The Company plans to provide an update on all PYNNACLE Phase 2 pivotal trial cohorts at a medical conference in the fourth quarter of 2026, including the primary analysis data from the ovarian cancer cohort.

PYNNACLE Phase 2 Ovarian Cancer Interim Data Update

The updated interim ovarian cancer data below are summarized as of a May 14, 2026 data cutoff date.

Efficacy

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The efficacy population consisted of 76 patients enrolled as of the data cutoff date who either had ≥1 post-baseline tumor assessment or discontinued early.

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Overall response rate (ORR) of 46% (35/76 patients, including four confirmed complete responses, 29 confirmed partial responses, and two unconfirmed partial responses) per investigator assessment according to Response Evaluation Criteria in Solid Tumors (RECIST) version 1.1.

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The median time to response was 1.3 months and median duration of response was 10.0 months, based on confirmed responses only.

Safety

Rezatapopt continues to show a favorable and consistent safety and tolerability profile across all cohorts, with mostly Grade 1 and 2 treatment-related adverse events (AEs) observed as well as a low rate (5%) of discontinuation due to treatment-related AEs. The safety and tolerability profile of rezatapopt in the ovarian cancer cohort was similar to the overall population.

Regulatory Update

In a recent meeting with the U.S. Food and Drug Administration (FDA), the Company obtained feedback that continues to support its strategy for submitting a New Drug Application (NDA) for accelerated approval of rezatapopt in patients with platinum-resistant/refractory ovarian cancer with a TP53 Y220C mutation based on the Phase 2 portion of the PYNNACLE clinical trial. The Company anticipates submitting an NDA in the first quarter of 2027.

About Rezatapopt

Rezatapopt (PC14586) is a first-in-class, small molecule, p53 reactivator designed to selectively bind to the pocket in the p53 Y220C mutant protein, restoring the wild-type tumor-suppressor function. The U.S. Food and Drug Administration granted Fast Track designation to rezatapopt for the treatment of patients with locally advanced or metastatic solid tumors with a p53 Y220C mutation and Orphan Drug Designation for the treatment of TP53 Y220C positive ovarian cancer, fallopian tube cancer, and primary peritoneal cancer.

About the PYNNACLE Clinical Trial

The ongoing Phase 1/2 PYNNACLE clinical trial is evaluating rezatapopt in patients with advanced solid tumors harboring a TP53 Y220C mutation. The primary objective of the Phase 1 portion of the clinical trial was to determine the maximum tolerated dose and recommended Phase 2 dose (RP2D) of rezatapopt when administered orally to patients. Safety, tolerability, pharmacokinetics, and effects on biomarkers were also assessed. The Phase 2 portion is a registrational, single arm, expansion basket clinical trial comprising five cohorts (ovarian, lung, breast, and endometrial cancers, and other solid tumors) with the primary objective of evaluating the efficacy of rezatapopt at the RP2D in patients with TP53 Y220C, conducted across approximately 70 sites.

For more information about the Phase 1/2 PYNNACLE clinical trial, refer to www.clinicaltrials.gov (NCT trial identifier NCT04585750).

(Press release, PMV Pharma, AUG 31, 2026, View Source [SID1234670446])