Avidity Biosciences Announces Completion of Enrollment for HARBOR™, the First Global Phase 3 Trial of Delpacibart Etedesiran (del-desiran) for Treatment of DM1 and Provides Guidance on Regulatory Submission

-- Topline data readout from HARBOR study anticipated in Q2 2026 --
-- Marketing application submissions for del-desiran including in U.S., EU and Japan
anticipated to start in H2 2026; on track to potentially be the first globally approved drug for DM1--
-- On track to share updates from ongoing MARINA-OLE™ trial of del-desiran including long-term 4 mg/kg efficacy and safety data in Q4 2025 --

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