X0306 4 2021-12-08 0 0001787297 Passage BIO, Inc. PASG 0001799780 Quigley Jill M. ONE COMMERCE SQUARE 2005 MARKET STREET, 39TH FLOOR PHILADELPHIA PA 19103 0 1 0 0 Chief Operating Officer Common Stock 2021-12-08 4 M 0 71975 0.23 A 368754 D Common Stock 3608 I By Spouse Employee Stock Option (right to buy) 0.23 2021-12-08 4 M 0 11193 0.00 D 2029-02-06 Common Stock 11193 3729 D Employee Stock Option (right to buy) 0.23 2021-12-08 4 M 0 60782 0.00 D 2029-02-06 Common Stock 60782 27626 D Includes 367,259 of common stock, of which 88,488 shares are unvested and subject to repurchase by the Issuer if the reporting person ceases to provide services to the Issuer prior to the vesting of the shares. Includes 1,495 shares acquired under the 2020 Employee Stock Purchase Plan on May 14, 2021. The option vested as to 25% of the total shares on November 12, 2019 and then 2.0833% of the total shares vest monthly thereafter, with 100% of the total shares vested on November 12, 2022, subject to the reporting person's provision of service to the issuer on each vesting date. The option vests as to 25% of the total shares on May 8, 2020 and then 2.0833% of the total shares vest monthly thereafter, with 100% of the total shares vested on May 8, 2023 subject to the reporting person's provision of service to the issuer on each vesting date. /s/ Edgar Cale, Attorney-in-Fact 2021-12-10