Of 431 pts randomized, 241 had HR+ BC and 190 had TNBC. ORR for TALA was similar for the 2 groups: 61.8% for TNBC vs 63.2% for HR+. Duration of response median for TALA was longer for HR+ (6.8 months) compared to TNBC (4.3 months); both groups included a subset with a prolonged response to TALA...Talazoparib demonstrated improved PFS and ORR in pts both with gBRCAmut HR+ BC and TNBC.