X0306 4 2021-02-01 0001281895 ROCKET PHARMACEUTICALS, INC. RCKT 0001726398 Schwartz Jonathan David C/O ROCKET PHARMACEUTICALS, INC. 9 CEDARBROOK DRIVE CRANBURY NJ 08512 true Chief Medical Officer Common Stock 2021-02-01 4 M 0 11428 1.69 A 11428 D Common Stock 2021-02-01 4 M 0 213101 1.21 A 224529 D Stock Option (Right to Buy) 1.69 2021-02-01 4 D 0 11428 0 D 2027-04-12 Common Stock 11428 0 D Stock Option (Right to Buy) 1.21 2020-02-10 4 D 0 213101 0 D 2026-02-08 Common Stock 213101 38309 D This option represents a right to purchase a total of 11,428 shares of the Issuer's Common Stock 4,113 of which will become fully vested and exercisable on April 12, 2018, with the remaining 7,315 shares vesting in equal quarterly installments over the following two years, subject to the reporting person's continued employment with the Issuer. This option represents a right to purchase a total of 251,410 shares of the Issuer's Common Stock 83,803 of which became fully vested and exercisable on February 8, 2017, with the remaining 167,607 shares vesting in equal quarterly installments over the following two years, subject to the reporting person's continued employment with the Issuer. /s/ Sara Turken, as attorney-in-fact for Jonathan Schwartz 2021-02-03