29/04/2025 ALX Oncology’s Phase 2 ASPEN-03 & ASPEN-04 trials failed to meet the primary endpoint of ORR (Ref 1) ALX Oncology hit with a double blow in first-line R/M SCCHN as their Phase 2 ASPEN-03 & ASPEN-04 trials evaluating evorpacept, a CD47-blocker, in combination with pembrolizumab with or without chemotherapy did not meet the primary endpoints of improved ORR. While data showed trends in improvement versus historical controls, the signals were not strong enough to adva