Avidity Biosciences, Inc. is a biopharmaceutical company. The Company is engaged in delivering a new class of ribonucleic acid (RNA) therapeutics called antibody oligonucleotide conjugates (AOCs). The AOCs are designed to combine the specificity of monoclonal antibodies with the precision of oligonucleotide therapies to address targets and diseases previously unreachable with existing RNA therapies. Its advancing and expanding pipeline has three programs in clinical development. AOC 1001 is designed to treat people with myotonic dystrophy type 1 (DM1) and is in phase I/II development with the ongoing MARINA open label extension study (MARINA-OLE). AOC 1044 is designed for people with Duchenne muscular dystrophy and is in phase I/II development with the EXPLORE44 trial. AOC 1020 is designed to treat people living with facioscapulohumeral muscular dystrophy (FSHD) and is in Phase I/II development with the FORTITUDE trial.