X0306 4 2020-03-01 0 0001515673 Ultragenyx Pharmaceutical Inc. RARE 0001780113 Harris Erik 60 LEVERONI COURT NOVATO CA 94949 0 1 0 0 EVP & Chief Commercial Officer Common Stock 2020-03-01 4 A 0 7800 0.00 A 22109 D Common Stock 2020-03-01 4 A 0 3287 0.00 A 25396 D Common Stock 2020-03-01 4 F 0 824 56.08 D 24572 D Stock Option (Right to Buy) 56.08 2020-03-01 4 A 0 22000 0.00 A 2030-03-01 Common Stock 22000 22000 D Award of Restricted Stock Units ("RSUs") under the Company's 2014 Incentive Plan. The RSUs shall vest with respect to 1/4th of the underlying shares on each anniversary of the grant date, such that the RSUs are fully vested on the fourth anniversary of the grant date. Includes previously reported shares of common stock underlying RSUs granted to the Reporting Person, which are subject to certain vesting conditions. Represents 1,085 shares of common stock and 2,202 RSUs into which previously granted performance stock units were converted on March 1, 2020 upon certification of the performance metric. The RSUs will fully vest on March 1, 2021. Represents shares surrendered to the Issuer by the Reporting Person to pay required tax withholdings due to the vesting of RSUs. On the first anniversary of the grant date of the option (the "Option Anniversary Date"), 1/4th of the shares initially subject to the option shall vest; thereafter, 1/48th of the shares initially subject to the option shall vest on each month as measured from the Option Anniversary Date. /s/ Karah Parschauer, attorney-in-fact 2020-03-03