Zymeworks (ZYME) Soars on Positive Phase 3 Ziihera Data in Gastric Cancer – What Today’s Breakthrough Means for the Stock and Patients
Before the U.S. market open on November 17, 2025, Vancouver‑based Zymeworks Inc. released topline Phase 3 data from its pivotal HERIZON‑GEA‑01 study, evaluating Ziihera in first‑line treatment of HER2‑positive locally advanced or metastatic gastroesophageal adenocarcinoma, a group that includes cancers of the stomach, gastroesophageal junction, and esophagus. GlobeNewswire+1
