Detailed Narrative
REVTORPYK Approval and NCCN Recommendation
The FDA approved REVTORPYK in combination with fulvestrant with or without palbociclib on July 14, 2026, for HR+/HER2- locally advanced or metastatic breast cancer without a PIK3CA mutation, following progression on at least one line of endocrine therapy. Shortly after, NCCN updated its guidelines to recommend both the triplet and doublet regimens as preferred Category 1 for second-line or subsequent treatment in this patient population, reflecting rapid panel review and recommendation.
VIKTORIA-1 PIK3CA Mutant Cohort Results
Positive efficacy and safety results from the PIK3CA mutant cohort of the VIKTORIA-1 Phase III trial were presented at ASCO in June. The gedatolisib triplet demonstrated a statistically significant and clinically meaningful improvement in median Progression-Free Survival (PFS) of 11.1 months versus 5.6 months for alpelisib plus fulvestrant (HR 0.5). The gedatolisib doublet also showed a median PFS of 11.3 months versus 5.6 months (HR 0.51). Safety data were consistent with previous reports, with lower treatment discontinuation rates due to adverse events for gedatolisib (5.2% for triplet, 3.8% for doublet) compared to alpelisib (19%).
VIKTORIA-2 Expansion and First-Line Potential
The VIKTORIA-2 trial was expanded in May 2026 to include Study 2, which evaluates gedatolisib in combination with palbociclib and letrozole in treatment-naive endocrine-sensitive HR+/HER2- advanced breast cancer patients. This expansion aims to position gedatolisib regimens for potential use in nearly all first-line patients, irrespective of endocrine sensitivity or PIK3CA status. Early Phase Ib data for this regimen showed a median PFS of 48.6 months and an objective response rate of 79% in endocrine-sensitive patients, comparing favorably to historical data of approximately 25 months PFS and 53% ORR for ribociclib plus letrozole.
Prostate Cancer Program Update
The Phase Ib/II trial evaluating gedatolisib in combination with darolutamide for metastatic castration-resistant prostate cancer completed the 240mg dose-finding portion. No adverse events led to treatment discontinuation, and dose-limiting toxicity criteria were not met. Evaluation of a 300mg dose is currently ongoing. The company expects to provide updated clinical data and further details on its development strategy for prostate cancer during the fourth quarter of 2026.
Commercial Launch Preparations and Market Opportunity
Celcuity has completed its commercial infrastructure build-out, including an 88-person oncology sales team, in preparation for REVTORPYK's launch. Pre-commercial activities involved extensive engagement with key opinion leaders, major oncology organizations, and patient advocacy groups. An unbranded marketing campaign has driven awareness of the PAM pathway. Shipments of REVTORPYK are expected to commence late in Q3 2026, with a wholesale acquisition cost (WAC) of $10,000 per vial or $30,000 per cycle. An expanded access program has already begun shipping drug to eligible patients. The estimated total addressable market for REVTORPYK is over $6 billion annually, based on 37,000 estimated patients and approximately 10 treatment cycles per patient.