Avidity Bioscience updates on del-brax development

9 June 2025

Shares of Avidity Biosciences (Nasdaq: RNA) were up almost 5% at $38.00 pre-market today, as it announced the accelerated approval regulatory pathway in the USA is open for delpacibart braxlosiran (del-brax) in the treatment of facioscapulohumeral muscular dystrophy (FSHD).

The US biopharmaceutical company said it is committed to delivering a new class of RNA therapeutics called antibody oligonucleotide conjugates (AOCs) to profoundly improve people's lives,

Additionally, the company announced that it has initiated its global, confirmatory, Phase III FORWARD study intended to support a subsequent full approval package for del-brax for people living with FSHD in the USA and additional countries around the world.

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