Summit Therapeutics to present multiple ivonescimab data sets at ELCC 2026

Summit Therapeutics (SMMT) announced that data for its novel, potential first-in-class investigational bispecific antibody, ivonescimab, will be presented at the 2026 European Lung Cancer Congress in Copenhagen, Denmark. Three posters featuring updated ivonescimab data will be displayed on Friday, March 27 from 1:00 to 2:00 pm Central European Time. Data for HARMONi was generated and analyzed by Summit and for HARMONi-2 by our collaboration and licensing partner, Akeso (AKESF). The first poster, “Intracranial Efficacy of Ivonescimab Plus Chemotherapy in Epidermal Growth Factor Receptor Tyrosine Kinase Inhibitor-Resistant, EGFR-Mutated Non-Small Cell Lung Cancer in the HARMONi Study” includes outcome data from patients with and without asymptomatic brain metastases at baseline enrolled in HARMONi. These patients received either ivonescimab delivered in combination with chemotherapy, or chemotherapy alone in this global Phase III trial for patients with EGFR-mutated, locally advanced or metastatic non-squamous NSCLC who were previously treated with an EGFR TKI. Ivonescimab plus chemotherapy demonstrated an improvement in intracranial progression free survival in patients with baseline brain metastases of 10.1 months compared to 6.5 months for chemotherapy. In patients who did not have baseline CNS metastases, the addition of ivonescimab also showed an improvement in intracranial PFS over control arm with 15.7 months compared to 11.6 months. No new safety signals were identified across baseline brain metastasis subgroups. The second poster, “Health-Related Quality of Life in Patients Previously Treated with an EGFR-TKI from HARMONi: A Phase 3 Trial of Ivonescimab vs Placebo Plus Chemotherapy” includes data from patients enrolled in HARMONi. These patients received either ivonescimab delivered in combination with chemotherapy, or chemotherapy alone in this global Phase III trial for patients with EGFR-mutated, locally advanced or metastatic non-squamous NSCLC who were previously treated with an EGFR TKI. The third poster, “Health-Related Quality of Life with Ivonescimab Versus Pembrolizumab for PD-L1 Positive, NSCLC: a Randomised, Double-Blind, Phase 3 Study in China” includes data from patients enrolled in HARMONi-2 or AK112-303. These patients received either ivonescimab delivered as monotherapy, or pembrolizumab delivered as monotherapy in this Phase III study conducted exclusively in China for patients with locally advanced or metastatic NSCLC whose tumors have positive PD-L1 expression with all data collected and analyzed by Akeso.