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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1515673	Ultragenyx Pharmaceutical Inc.	RARE	Pharmaceutical Preparations (2834)	272546083

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1603347	Alan Theodore Huizenga	C/O Ultragenyx Pharmaceutical Inc. 60 Leveroni Court Novato CA 94949	Svp, Controller And Pao	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2020-05-15	961	$71.00	18,719	No	4	S	Direct
Common Stock	Acquisiton	2020-05-15	1,500	$21.00	20,219	No	4	M	Direct
Common Stock	Disposition	2020-05-15	1,500	$71.00	19,024	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	S	Direct
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock Option (Right to Buy)	Disposition	2020-05-15	1,500	$0.00	1,500	$21.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
15,500		2024-01-29	No	4	M	Direct

Footnotes

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.
Includes 305 shares acquired under the Company's 2014 Employee Stock Purchase Plan on April 30, 2020
Includes previously reported shares of common stock underlying RSUs granted to the Reporting Person, which are subject to certain vesting conditions.
1/4th of the option vested one year from January 29, 2014 and then 1/48th of the option vested monthly thereafter.