Ultragenyx CFO awarded RSUs and stock options

Ultragenyx Pharmaceutical Inc. Chief Financial Officer Howard Horn received new equity awards.

Rhea-AI Filing Summary

Ultragenyx Pharmaceutical Inc. Chief Financial Officer Howard Horn received new equity awards. He was granted 34,674 shares of common stock in the form of restricted stock units under the company’s 2023 Incentive Plan, bringing his direct common stock holdings to 115,025 shares.

The RSUs vest over four years, with one-quarter of the shares vesting on each anniversary of the grant date until fully vested on the fourth anniversary. Horn was also granted stock options for 59,952 shares of common stock at an exercise price of $24.52 per share, expiring on April 16, 2036. These options vest as to one-quarter of the shares on the first anniversary of the grant date and then in equal monthly installments over the following three years.

Insider Trade Summary

Grant/Award: 94,626 shares

Grant/Award 2 txns

Insider Horn Howard

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (Right to Buy)	59,952	$0.00	$0.00
Grant/Award	Common Stock	34,674	$0.00	$0.00

Holdings After Transaction: Stock Option (Right to Buy) — 59,952 contracts (Direct); Common Stock — 115,025 shares (Direct)

Footnotes (3)

1. F1. Award of Restricted Stock Units ("RSUs") under the Company's 2023 Incentive Plan. The RSUs shall vest with respect to 1/4th of the underlying shares on each anniversary of the grant date, such that the RSUs are fully vested on the fourth anniversary of the grant date
2. F2. Includes previously reported shares of common stock underlying RSUs granted to the Reporting Person, which are subject to certain vesting conditions.
3. F3. On the first anniversary of the grant date of the option (the "Option Anniversary Date"), 1/4th of the shares initially subject to the option shall vest; thereafter, 1/48th of the shares initially subject to the option shall vest on each month as measured from the Option Anniversary Date.

Key Figures

RSU grant: 34,674 shares Options granted: 59,952 options Option exercise price: $24.52 per share +2 more

5 metrics

RSU grant 34,674 shares Restricted Stock Units granted to CFO on April 16, 2026

Options granted 59,952 options Stock options for common stock granted to CFO on April 16, 2026

Option exercise price $24.52 per share Conversion or exercise price of newly granted stock options

Shares held after grant 115,025 shares Total direct common stock holdings following RSU award

Option expiration April 16, 2036 Expiration date of the new stock option grant

Key Terms

Restricted Stock Units ("RSUs"), 2023 Incentive Plan, Stock Option (Right to Buy), vesting conditions, +1 more

5 terms

Restricted Stock Units ("RSUs") financial

"Award of Restricted Stock Units ("RSUs") under the Company's 2023 Incentive Plan."

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

2023 Incentive Plan financial

"Award of Restricted Stock Units ("RSUs") under the Company's 2023 Incentive Plan."

Stock Option (Right to Buy) financial

"Stock Option (Right to Buy)"

vesting conditions financial

"which are subject to certain vesting conditions."

Vesting conditions are the rules that determine when someone earning company stock or stock options actually gains the right to keep or sell them, typically based on staying with the company for a set time or meeting performance targets. Think of it like keys that unlock gradually — some unlock by calendar date, others only after agreed milestones. Investors care because vesting shapes management incentives, the timing of share sales, and the number of shares that can enter the market, which can affect a company's valuation and ownership mix.

Option Anniversary Date financial

"On the first anniversary of the grant date of the option (the "Option Anniversary Date"), 1/4th of the shares..."

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Ultragenyx (RARE) CFO Howard Horn receive in this Form 4 filing?

Ultragenyx CFO Howard Horn received equity compensation in the form of restricted stock units and stock options. He was granted 34,674 RSU-linked common shares and 59,952 stock options, reflecting routine executive compensation rather than open-market buying or selling of shares.

How many Ultragenyx (RARE) shares does CFO Howard Horn hold after these grants?

After the reported equity award, Howard Horn directly holds 115,025 shares of Ultragenyx common stock. This figure includes previously reported shares and the new RSU-related grant, which will vest over time subject to the stated vesting conditions in the company’s incentive plan.

What are the key terms of Howard Horn’s new Ultragenyx (RARE) RSU grant?

Howard Horn’s RSU grant covers 34,674 underlying common shares. The RSUs vest in four equal annual installments, with one-quarter of the shares vesting on each anniversary of the grant date until they are fully vested on the fourth anniversary, subject to applicable conditions.

What are the details of the stock options granted to Ultragenyx (RARE) CFO Howard Horn?

Howard Horn received stock options for 59,952 shares of Ultragenyx common stock at an exercise price of $24.52 per share. One-quarter of these shares vest on the first anniversary of the grant date, with the remaining shares vesting monthly thereafter until April 16, 2036.

Is the Ultragenyx (RARE) Form 4 transaction a market purchase or sale by the CFO?

The Form 4 records grant or award acquisitions, not open-market trades. The transactions use code “A,” indicating equity compensation grants of RSUs and stock options to CFO Howard Horn, with no reported open-market buying or selling of Ultragenyx common stock in this filing.

How long do Howard Horn’s new Ultragenyx (RARE) stock options remain exercisable?

The newly granted stock options for 59,952 Ultragenyx shares are scheduled to expire on April 16, 2036. They vest over four years, starting with a 25% cliff vest on the first anniversary of the grant date, followed by monthly vesting of the remaining option shares.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Accepted by SEC EDGAR 04/20/2026 - 05:09 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Horn Howard

(Last) (First) (Middle)

C/O ULTRAGENYX PHARMACEUTICAL INC.

60 LEVERONI COURT

(Street)

NOVATO CALIFORNIA 94949

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Ultragenyx Pharmaceutical Inc. [ RARE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/16/2026		A		34,674(1)	A	$0	115,025(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (Right to Buy)	$24.52	04/16/2026		A		59,952		(3)	04/16/2036	Common Stock	59,952	$0	59,952	D

Explanation of Responses:

1. Award of Restricted Stock Units ("RSUs") under the Company's 2023 Incentive Plan. The RSUs shall vest with respect to 1/4th of the underlying shares on each anniversary of the grant date, such that the RSUs are fully vested on the fourth anniversary of the grant date

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

3. On the first anniversary of the grant date of the option (the "Option Anniversary Date"), 1/4th of the shares initially subject to the option shall vest; thereafter, 1/48th of the shares initially subject to the option shall vest on each month as measured from the Option Anniversary Date.

	/s/ Karah Parschauer, attorney-in-fact	04/20/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)