Dyne Therapeutics, Inc.·Healthcare

DYN shares jump after the company files a BLA with the FDA for z-rostudirsen in Duchenne muscular dystrophy.

- Submission for Accelerated Approval based on dystrophin as a surrogate endpoint - - In the registrational expansion cohort of the DELIVER trial, treatment with z-rostudirsen resulted in a robust and statistically significant increase in dystrophin production with functional improvement observed across multiple clinical endpoints and a favorable safety profile 1 - - Proposed dosing regimen of 20 mg/kg administered intravenously once every 4 weeks (Q4W) - WALTHAM, Mass., May 26, 2026 (GLOBE NEWSWIRE) -- Dyne Therapeutics, Inc. (Nasdaq: DYN), a clinical-stage company focused on delivering functional improvement for people living with genetically driven neuromuscular diseases, today announced the submission of a Biologics License Application (BLA) to the U.S. Food and Drug Administration (FDA) for zeleciment rostudirsen (z-rostudirsen, also known as DYNE-251) 20 mg/kg Q4W for the treatment of individuals with Duchenne muscular dystrophy (DMD) amenable to exon 51 skipping.

Dyne Therapeutics, Inc. retains a Strong Buy rating, driven by clinical progress in DM1 and DMD programs targeting significant unmet needs. DYN expects to file a BLA for z-rostudirsen in DMD exon 51 skipping patients in Q2 2026, with potential commercialization by Q1 2027. Top-line data from the phase 1/2 ACHIEVE REC study in DM1 is anticipated in Q1 2027, supporting future accelerated approval filings.

DYN shares jump 10% after launching a phase III study of z-rostudirsen in Duchenne muscular dystrophy patients amenable to exon 51 skipping.

WALTHAM, Mass., May 20, 2026 (GLOBE NEWSWIRE) -- Dyne Therapeutics, Inc. (Nasdaq: DYN), a clinical-stage company focused on delivering functional improvement for people living with genetically driven neuromuscular diseases, today announced that it has granted inducement equity awards to 17 newly hired employees.

- 72-week trial will enroll approximately 90 participants; first site now open for enrollment - - Primary endpoint is rise from floor (RFF) velocity with multiple secondary endpoints to assess muscle and pulmonary function - - FORZETTO trial design and protocol aligned with FDA; trial intended to serve as confirmatory trial for traditional approval in the U.S. and support ex-U.S. marketing applications - WALTHAM, Mass., May 20, 2026 (GLOBE NEWSWIRE) -- Dyne Therapeutics, Inc. (Nasdaq: DYN), a clinical-stage company focused on delivering functional improvement for people living with genetically driven neuromuscular diseases, today announced the initiation of the Phase 3 FORZETTO trial of zeleciment rostudirsen (z-rostudirsen, also known as DYNE-251), in individuals with Duchenne muscular dystrophy (DMD) amenable to exon 51 skipping.
Dyne Therapeutics, Inc., a muscle disease company, operates as a biotechnology company that focuses on advancing therapeutics for genetically driven muscle diseases in the United States. It develops various programs for myotonic dystrophy type 1, duchenne muscular dystrophy, and facioscapulohumeral dystrophy, as well as rare skeletal muscle, and cardiac and metabolic muscle diseases using its FORCE platform that delivers disease-modifying therapeutics. The company was incorporated in 2017 and is headquartered in Waltham, Massachusetts..