Moderna Stock Explodes Over 100% After Cancer Vaccine Breakthrough

NewsWed, 19 Aug 2026 14:09:39 UTC1 hour ago

Moderna (MRNA) stock exploded over 100% in Wednesday pre-market trading, hitting $122.51 after the company and Merck (MRK) reported the first positive Phase 3 result for a personalized mRNA cancer vaccine.

The gain is pre-market only for now. Moderna last closed at $62.96 on Tuesday, and regular trading in New York had not yet opened at the time of writing.

Moderna Stock Rally. Source: Yahoo Finance

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A First for Personalized mRNA Cancer Therapy

The Phase 3 INTerpath-001 trial tested a bold idea. Doctors read the mutations in a patient's tumor. Moderna then builds a custom mRNA shot for that one person.

Moderna and @Merck today announced positive topline results from the Phase 3 INTerpath-001 trial evaluating adjuvant treatment with intismeran autogene, a novel investigational mRNA-based individualized neoantigen therapy jointly developed by Merck and Moderna, in combination… pic.twitter.com/v4DjH0r823
- Moderna (@moderna_tx) August 19, 2026

Each shot encodes up to 34 tumor targets, known as neoantigens. In effect, it teaches the immune system exactly what to hunt.

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Moderna Stock Explodes Over 100% After Cancer Vaccine Breakthrough

A First for Personalized mRNA Cancer Therapy

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