Formosa Pharmaceuticals Files Clinical Trial Application for TSY-110, an Antibody-Drug Conjugate Biosimilar Targeting HER2-Positive Breast Cancers

Formosa Pharmaceuticals, Inc. (TW: 6838), today announced the submission of a Clinical Trial Application (CTA) to European regulatory authorities to conduct a pivotal clinical trial for TSY-110. TSY-110 is a biosimilar candidate referencing Roche’s antibody-drug conjugate (ADC) Kadcyla® (ado-trastuzumab emtansine), indicated for HER2-positive metastatic and early-stage breast cancer.

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(28 August, 2026, Press release, PR Newswire)