This thesis, conducted in collaboration with ESTECO SPA and OPTIMAD SRL, presents a study on the single-objective shape optimization of a high-performance yacht. The MANTA MKII ASD, designed by Adragna Yacht Studio Design, is used as the baseline reference model. The original configuration has been modified to optimize its aerodynamic and hydrodynamic performance, with a specific focus on minimizing drag. The optimization process relies on computational fluid dynamics (CFD). However, due to the high computational cost associated with optimization techniques, which require a significant number of design evaluations, reduced-order models (ROMs) were developed to significantly decrease computational time and cost while maintaining acceptable accuracy levels.