X0206 3 2016-07-19 0 0001628738 Audentes Therapeutics, Inc. BOLD 0001555953 5AM Partners III, LLC 2200 SAND HILL ROAD, SUITE 110 MENLO PARK CA 94025 0 0 1 0 0001456890 5AM VENTURES III, L.P. 2200 SAND HILL ROAD, SUITE 110 MENLO PARK CA 94025 0 0 1 0 0001478660 5AM Co-Investors III, L.P. 2200 SAND HILL ROAD, SUITE 110 MENLO PARK CA 94025 0 0 1 0 0001219014 ROCKLAGE SCOTT M 2200 SAND HILL ROAD, SUITE 110 MENLO PARK CA 94025 0 0 1 0 0001240357 DIEKMAN JOHN D 2200 SAND HILL ROAD, SUITE 110 MENLO PARK CA 94025 0 0 1 0 0001598549 Schwab Andrew J. 2200 SAND HILL ROAD, SUITE 110 MENLO PARK CA 94025 0 0 1 0 No securities beneficially held 0 D Series A Preferred Stock Common Stock 1387392 I By 5AM Ventures III, L.P. Series B Preferred Stock Common Stock 616874 I By 5AM Ventures III, L.P. Series C Preferred Stock Common Stock 259524 I By 5AM Ventures III, L.P. Series A Preferred Stock Common Stock 35755 I By 5AM Co-Investors III, L.P. Series B Preferred Stock Common Stock 15898 I By 5AM Co-Investors III, L.P. Series C Preferred Stock Common Stock 6688 I By 5AM Co-Investors III, L.P. Each share of the issuer's Series A Preferred Stock will automatically convert into 1 share of the issuer's Common Stock immediately upon the closing of the issuer's IPO and has no expiration date. 5AM Partners III, LLC is the general partner of 5AM Ventures III, L.P. and 5AM Co-Investors III, L.P. Dr. John Diekman, Andrew Schwab and Dr. Scott Rocklage are the managing members of 5AM Partners III, LLC. 5AM Partners III, LLC may be deemed to have sole voting and investment power over the shares beneficially owned by 5AM Ventures III, L.P. and 5AM Co-Investors III, L.P. Dr. Diekman, Mr. Schwab and Dr. Rocklage may be deemed to have shared voting and investment power over the shares beneficially owned by 5AM Ventures III, L.P. and 5AM Co-Investors III, L.P. Each of 5AM Partners III, LLC, Dr. Diekman, Mr. Schwab and Dr. Rocklage disclaim beneficial ownership of such shares, except to the extent of its or his pecuniary interest therein. Each share of the issuer's Series B Preferred Stock will automatically convert into 1 share of the issuer's Common Stock immediately upon the closing of the issuer's IPO and has no expiration date. Each share of the issuer's Series C Preferred Stock will automatically convert into 1 share of the issuer's Common Stock immediately upon the closing of the issuer's IPO and has no expiration date. /s/ Scott Rocklage as a managing member of 5AM Partners III, LLC, which is general partner of each of 5AM Ventures III, L.P. and 5AM Co-Investors III, L.P. 2016-07-19