Pts with advanced metastatic solid tumors resistant or refractory to standard treatment, with and without mTOR/AKT/PI3Kpathway alterations, received sapanisertib 3mg or 4mg daily together with metformin once to three times daily(500mg - 1500mg)....1/4 pts in PR had AKTand mTORmutation; tumor types included leiomyosarcoma (n = 2), breast (n = 1) and endometrial cancer (n = 1).