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Agenus Announces Publication of Phase 1b Botensilimab and Balstilimab Data in Post-Immunotherapy Hepatocellular Carcinoma in Liver Cancer

$AGENPress releaseMay 15, 2026, 4:11 PM ETRead the release

Agenus published Phase 1b data for its botensilimab and balstilimab combination in patients with hepatocellular carcinoma who progressed after prior immunotherapy. The study of 19 heavily pretreated patients showed a 17% objective response rate and a median overall survival of 12.3 months, which compares favorably to historical controls in this difficult-to-treat population.

Key figures

Drug Name
botensilimab (BOT) and balstilimab (BAL)
Phase Of Trial
Phase 1b
Orrr
17%
Median os
12.3 months
Median pfs
4.4 months
Patient count
19
Clinical benefit rate
50%
Grade 3 adverse events
37%
Efficacy evaluable count
18

AI analysis

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    AGEN: Agenus Announces Publication of Phase 1b Botensilimab and Balstilimab Data in Post-Immunotherapy Hepatocellular Carcinoma in Liver Cancer — AI Analysis | Signal8