Agenus Reports 72% Pathologic Complete Response in dMMR Colon Cancer Cohort
Agenus reported 72% pathologic complete response in 18 dMMR colon cancer patients treated with botensilimab and balstilimab in a Phase 2 study. 83% achieved major pathologic response. All patients were alive at 15-month median follow-up, with 16 showing no recurrence. The study was presented at the ESMO Congress.
How this was made

The 30-second read
Why it matters
The data suggest a high efficacy signal for the botensilimab/balstilimab combo, which could accelerate development timelines and attract partnership interest.
Market read
First disclosure of strong Phase 2 results for a niche cancer indication; could drive short-term upside for Agenus and influence related biotech valuations.
What to watch
Potential safety signals and the investigational status of the drugs could temper enthusiasm.
Background
Agenus presented the data at the ESMO Congress in a poster session, marking the first public release of the NEOASIS trial results for dMMR colon cancer.
Ticker impact
Agenus disclosed Phase 2 data showing 72% pathologic complete response in dMMR colon cancer, a first public report of these results.
likely upward pressure as market prices in the strong response rates.
First disclosure of high efficacy results in a niche oncology indication, a material catalyst for a biotech.
Market effects
May boost sentiment for other dMMR-focused biotech firms and immuno-oncology pipelines.
Limited to US biotech sector; no broader regional effect.
Highlights progress in checkpoint inhibitor combos, relevant to global oncology investors.
Counterpoint
Small cohort and lack of control arm could limit confidence; investors may wait for larger trials before buying.
Key entities
- companyAgenus Inc.
Biopharma developing immuno-oncology therapies.
- drugBotensilimab
PD-1 inhibitor used in the trial.
- drugBalstilimab
CTLA-4 inhibitor used in the trial.


