X0306 4 2016-06-19 false 0001515673 Ultragenyx Pharmaceutical Inc. RARE 0001616640 AGARWAL SUNIL C/O ULTRAGENYX PHARMACEUTICAL INC. 60 LEVERONI COURT NOVATO CA 94949 false true false false Chief Medical Officer Common Stock 2016-06-19 4 F false 392.00 54.99 D 11219.00 D Common Stock 2016-06-20 4 S false 650.00 54.16 D 10569.00 D Represents shares surrendered to the Issuer by the Reporting Person to pay required tax withholdings due upon vesting of Restricted Stock Units granted to the Reporting Person under the 2014 Incentive Plan of the Issuer. The shares surrendered were valued based on the closing price of the common stock of the Issuer on the vesting date. Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting Person, which are subject to certain vesting conditions. The sales reported on this Form 4 were effected pursuant to a trading plan adopted by the Reporting Person pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $54.156 to $54.16 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. /s/ Shalini Sharp, attorney in fact for Sunil Agarwal 2016-06-21