Moderna
MRNATrial resultsA cancer vaccine trial win lifted the stock, then detailed results disappointed -18% on Oct 22
On Aug. 19 Moderna and Merck said their personalized cancer vaccine, intismeran, given with Merck's immune drug Keytruda, beat Keytruda alone in a final-stage (Phase 3) trial of 1,137 people after melanoma surgery. They gave no numbers then. Detailed results leaked online on Oct. 22: a 42% lower risk of the cancer returning or death, with mostly mild side effects. The stock fell 17.6% that day.
Why it matters. The companies say it is the first final-stage trial win for an mRNA cancer treatment, a sign Moderna can earn money beyond COVID vaccines. After a 672% rise in a year, investors wanted more: RBC says they expected a 41% to 50% cut in risk, and a smaller earlier trial showed 49%. Cheaper immune drugs given before surgery may compete.
What's next. Full results are presented at the ESMO cancer meeting in Madrid on Oct. 24. RBC thinks FDA approval could come in 2027, and a kidney cancer readout is due by early 2027. Weak overall survival data would undo the case.
- 1Merck and Moderna Announce Phase 3 INTerpath-001 Trial of Intismeran Autogene Plus KEYTRUDA Met Endpoints of Recurrence-Free Survival (RFS) and Distant Metastasis-Free Survival (DMFS) · Merck and Moderna, Aug 19
- 2Moderna, Merck mRNA Cancer Vaccine Succeeds in Late-Stage Trial · AJMC, Aug 19
- 3ESMO 2026: Merck, Moderna shares fall as cancer vaccine disappoints after data leak · BioSpace, Oct 22
- 4Moderna Tumbles 25% After Apparent Early Leak of Melanoma Vaccine Data; BioNTech Dips, Pfizer Edges Higher · 24/7 Wall St., Oct 22
Researched Oct 24
- Price
- $220.83
- Value
- $88.16B
- 1 month
- +16%
- 3 months
- +287%
- 1 year
- +787%
- Biggest day, Oct 22
- -18%
Biotechnology: Biological Products (No Diagnostic Substances) · not in the 100 · as of Nov 2