Akeso IncAkeso's ivonescimab cut death risk 27% vs pembrolizumab in the Phase III HARMONi-2 lung cancer study

Summit Therapeutics said its partner Akeso reported that ivonescimab monotherapy reduced the risk of death by 27% compared with pembrolizumab monotherapy in the Phase III HARMONi-2 study in PD-L1-positive advanced non-small cell lung cancer conducted in China. In the protocol-specified interim overall survival analysis, a secondary endpoint, ivonescimab achieved a hazard ratio of 0.73, with a 95% confidence interval of 0.57 to 0.95 and a p-value of 0.009, and improved median overall survival by 8.2 months, to 30.8 months versus 22.6 months for pembrolizumab. In the PD-L1 high expression subgroup, the hazard ratio was 0.58, with a 95% confidence interval of 0.38 to 0.89. The data are being presented at the IASLC 2026 World Conference on Lung Cancer in Seoul by Professor Caicun Zhou of Shanghai Pulmonary Hospital on Tuesday, September 15, 2026. Akeso received marketing authorization for ivonescimab from China's National Medical Products Administration in April 2025 based on HARMONi-2, and Summit is conducting the global Phase III HARMONi-7 study of ivonescimab monotherapy versus pembrolizumab monotherapy in PD-L1 high-expressing metastatic NSCLC, targeting enrollment of 780 patients.
Akeso IncAkeso's ivonescimab cut death risk 27% vs pembrolizumab in the Phase III HARMONi-2 lung cancer study
Summit Therapeutics PLC