Type	Name	Date
Underwriting agreement	Underwriting Agreement, among Ultragenyx Pharmaceutical Inc. and Morgan Stanley & Co. LLC, J.P. Morgan Securities LLC and Cowen and Company LLC, as representatives of the underwriters named therein	07/21/2015
Underwriting agreement	Underwriting Agreement, among Ultragenyx Pharmaceutical Inc. and Morgan Stanley & Co. LLC, Cowen and Company LLC and Jefferies LLC, as representatives of the underwriters named therein	02/10/2015