Genmab reports phase 2 trial data for colorectal cancer drug
Genmab (NASDAQ:GMAB) reported Phase 2 trial data for petosemtamab in metastatic colorectal cancer, showing 75% and 67% response rates in first- and second-line patients, respectively. The trial involved 79 patients and was presented at the European Society for Medical Oncology Congress 2026. Genmab is conducting four Phase 3 trials and will host an investor update.
How this was made
The 30-second read
Why it matters
The disclosed Phase 2 data represent the first public efficacy read‑out for petosemtamab, a key asset in Genmab's pipeline.
Market read
First‑time trial data are likely to move Genmab's stock as investors reassess the drug's commercial potential.
What to watch
Safety profile and regulatory timelines remain uncertain, which could temper upside.
Background
Genmab is a Copenhagen‑based biotech developing bispecific antibodies for cancer treatment.
Ticker impact
Genmab disclosed Phase 2 trial results for petosemtamab showing 75% response in first‑line metastatic colorectal cancer patients.
upward pressure as market prices in the high response rates
Phase 2 data with >70% response rates are material for a biotech and often trigger price appreciation before Phase 3 read‑outs.
Market effects
Positive data may lift the broader oncology biotech sector.
European biotech markets could see modest gains.
Potential ripple effect on global cancer‑therapy pipelines.
Counterpoint
If later‑stage trials fail to replicate these results, the current optimism could reverse sharply.
Key entities
- companyGenmab A/S
Biotech firm reporting the trial results.
- drugPetosemtamab
Investigational bispecific antibody targeting metastatic colorectal cancer.


