Antibody-drug conjugates (ADCs) with a dual payload, which deliver two distinct cytotoxic agents via a single antibody, are emerging therapeutics developed to address the limitations of classic ADCs. Primelink Biotherapeutics (Shenzhen) Co. Ltd. recently presented data for their dual-payload ADCs, highlighting PLB-015, which carries a TOP1 inhibitor and an ATR inhibitor with an anti-HER2 antibody and is designed to inhibit the DNA damage response activated by cancer cells when harmed.