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Exelixis Provides Update on the Phase 3 STELLAR-303 Trial Evaluating Zanzalintinib in Combination with an Immune Checkpoint Inhibitor in Patients with Metastatic Colorectal Cancer

$EXELPress releaseJun 22, 2026, 8:00 AM ETRead the release

The final analysis of the STELLAR-303 trial's non-liver metastases subgroup showed a non-statistically significant trend in overall survival favoring zanzalintinib plus atezolizumab, with a hazard ratio of 0.83 and P=0.1185. Median overall survival was 15.9 months for the combination arm compared to 12.7 months for regorafenib, with no new safety signals identified in the subgroup.

Key figures

Drug Name
Zanzalintinib
Phase Of Trial
Phase 3
P value
0.1185
Pdufa date
December 3, 2026
Hazard ratio
0.83
Median os control
12.7 months
Confidence interval
0.66–1.05
Median os combination
15.9 months

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