X0206 3 2020-07-27 1 0001599901 Avidity Biosciences, Inc. RNA 0001819159 Kim Jae B. C/O AVIDITY BIOSCIENCES, INC. 10975 N. TORREY PINES RD., SUITE 150 LA JOLLA CA 92037 0 1 0 0 Chief Medical Officer /s/ John W. Wallen III, Ph.D., J.D., Attorney-in-Fact 2020-07-27