
Agenus Reports 48% Estimated Three-Year Survival With BOT+BAL in Recurrent Ovarian Cancer at IGCS 20263.10.2026 16:50:00 CEST | Press release
Survival estimate remained at 48% between years two and three, extending evidence of durable benefitResults observed in heavily pretreated, difficult-to-treat population that received a median of four prior lines of therapy; nearly three-quarters of patients had platinum-resistant or refractory cancer Agenus Inc. (Nasdaq: AGEN), a leader in immuno-oncology innovation, today announced three-year follow-up results from the ovarian cancer cohort of its 400+ patient Phase 1b C-800-01 trial. The study evaluated botensilimab (BOT), Agenus’ multifunctional, Fc-enhanced anti-CTLA-4 antibody, in combination with balstilimab (BAL), Agenus’ anti-PD-1 antibody. The results, including three-year survival and outcomes by sensitivity to platinum-based chemotherapy and by prior treatment, were presented at the 2026 International Gynecologic Cancer Society (IGCS) Annual Global Meeting in Montréal, Canada. Among patients evaluable for efficacy, three-year overall survival was 48% (n=35), unchanged from



















