Celcuity (CELC) shares dropped over 25% despite Phase 3 VIKTORIA-1 data confirming gedatolisib's best-in-class efficacy in advanced breast cancer. Gedatolisib demonstrated superior progression-free survival and objective response rates versus current standards, supporting blockbuster potential in a $6bn market. FDA approval for HR+/HER2- PIK3CA wild-type breast cancer is expected by July 2026, with a supplementary NDA for the mutant cohort planned.