X0306 4 2019-09-05 0 0001628738 Audentes Therapeutics, Inc. BOLD 0001401018 Patterson Matthew R C/O AUDENTES THERAPEUTICS, INC. 600 CALIFORNIA STREET, 17TH FLOOR SAN FRANCISCO CA 94108 1 1 0 0 Chief Executive Officer Common Stock 2019-09-05 4 F 0 1974 31.02 D 113394 D Common Stock 171814 I By Matthew R. Patterson Revocable Trust Shares relinquished by the Reporting Person and cancelled by the Issuer in exchange for the Issuer's agreement to pay federal and state tax withholding obligations of the Reporting Person resulting from the vesting of restricted stock units. The Reporting Person did not sell or otherwise dispose of the shares for any reason other than to cover required taxes. The Reporting Person is the trustee of the Matthew R. Patterson Revocable Trust. /s/ Mark Meltz, as attorney-in-fact for Matthew Patterson 2019-09-09