Confirmed partial response observed in 8 pts (ORR = 73%, 95% CI: 39, 94) per investigator review and RECIST v1.1; 6 pts had ongoing response. Median progression-free survival was 10.8 months (95% CI: 1.2, not reached [NR]), duration of response and overall survival NR; longest ongoing response was >9 months....ABBV-400 monotherapy showed promising tolerability and efficacy in pts with various MET amp advanced solid tumors.