X0306 4 2015-08-19 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 2015-08-19 4 F false 5480.00 116.99 D 23920.00 D Common Stock 2015-08-20 4 S false 3370.00 112.1892 D 20550.00 D Common Stock 2015-08-20 4 S false 3650.00 112.7284 D 16900.00 D Common Stock 2015-08-20 4 M false 10000.00 55.88 A 26900.00 D Common Stock 2015-08-20 4 S false 724.00 107.302 D 26176.00 D Common Stock 2015-08-20 4 S false 1471.00 108.9801 D 24705.00 D Common Stock 2015-08-20 4 S false 4875.00 110.3961 D 19830.00 D Common Stock 2015-08-20 4 S false 2000.00 111.214 D 17830.00 D Common Stock 2015-08-20 4 S false 930.00 111.9035 D 16900.00 D Stock Option (Right to Buy) 55.88 2015-08-20 4 M false 10000.00 0.00 D 2024-08-18 Common Stock 10000.00 140000.00 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 Issuers 2014 Incentive Plan. The shares surrendered were valued based on the closing price of the Issuers common stock 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 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 $111.9100 to $112.4500 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $112.4600 to $113.3800 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $107.1103 to $107.5100 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $108.6900 to $109.6700 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $109.7367 to $110.6900 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.7600 to $111.7000 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $111.8800 to $111.9100 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. 1/4th of the shares underlying the option vested on August 19, 2015, and then 1/48th of the underlying shares will vest monthly thereafter, provided the Reporting Person has not terminated services with the Issuer. /s/ Sunil Agarwal 2015-08-21