Theodore Alan Huizenga - Sep 27, 2023 Form 4 Insider Report for Ultragenyx Pharmaceutical Inc. (RARE)

Role: SVP, Chief Accounting Officer
Signature: /s/ Karah Parschauer, attorney-in-fact
Stock symbol: RARE
Transactions as of: Sep 27, 2023
Transactions value $: $0
Form type: 4
Date filed: 9/29/2023, 02:16 PM
Previous filing: Sep 11, 2023
Next filing: Jan 2, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	RARE	Common Stock						23.6K	Sep 27, 2023	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	RARE	Stock Option (Right to Buy)	Award	$0	+2.35K		$0.00	2.35K	Sep 27, 2023	Common Stock	2.35K	$67.37	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting Person, which are subject to certain vesting conditions.
F2	On March 1, 2022, the Reporting Person was granted an option to purchase 2,351 shares of common stock. The option vests upon the achievement of specified performance criteria. Upon achievement of the performance criteria, 1/3 of the option vests on the date of certification by the Issuer's compensation committee of achievement of the performance criteria, 1/3 of the option vests on March 1, 2024 and 1/3 of the option vests on March 1, 2025. On September 27, 2023, the Issuer's compensation committee certified achievement of the performance criteria for the option, resulting in the vesting of the option of 784 shares on that date.

Content

Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting Person, which are subject to certain vesting conditions.

On March 1, 2022, the Reporting Person was granted an option to purchase 2,351 shares of common stock. The option vests upon the achievement of specified performance criteria. Upon achievement of the performance criteria, 1/3 of the option vests on the date of certification by the Issuer's compensation committee of achievement of the performance criteria, 1/3 of the option vests on March 1, 2024 and 1/3 of the option vests on March 1, 2025. On September 27, 2023, the Issuer's compensation committee certified achievement of the performance criteria for the option, resulting in the vesting of the option of 784 shares on that date.