HLA-A*02:01+ OC pts were enrolled as all-comers in escalation and expansion cohorts with MAGE-A4 expression tested by IHC retrospectively....Of 28 OC pts with evaluable MAGE-A4 IHC expression, 16 (57%) were positive (pos) with median H score 28 (maximum 300)….15 pts were MAGE-A4 pos; 1 had confirmed PR (duration 12+ months) and 5 had SD. 6/15 pts had any tumor shrinkage.