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Ultragenyx (RARE) CEO gets new RSUs, options and shifts 400K shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Ultragenyx Pharmaceutical Inc. President & CEO Emil D. Kakkis reported new equity compensation awards and updated indirect holdings. He received 76,745 Restricted Stock Units (RSUs) under the company’s 2023 Incentive Plan, which vest in four equal annual installments from the grant date.

He was also granted a stock option for 132,693 shares of common stock at an exercise price of $24.52 per share, vesting 25% on the first anniversary of the grant and the remainder monthly thereafter until 2036-04-16. Following these awards, he directly holds 735,739 shares of common stock.

The filing also reflects updated indirect ownership, including 1,758,985 shares held through the Emil Kakkis and Jenny Soriano Living Trust and an aggregate 400,000 shares contributed to two grantor retained annuity trusts (GRATs). These changes reflect compensation grants and estate-planning transfers rather than open-market trades.

Positive

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Insider KAKKIS EMIL D
Role President & CEO
Type Security Shares Price Value
Grant/Award Stock Option (Right to Buy) 132,693 $0.00 --
Grant/Award Common Stock 76,745 $0.00 --
holding Common Stock -- -- --
holding Common Stock -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Stock Option (Right to Buy) — 132,693 shares (Direct, null); Common Stock — 735,739 shares (Direct, null); Common Stock — 1,758,985 shares (Indirect, By Emil Kakkis and Jenny Soriano Living Trust, dated June 18, 200909)
Footnotes (1)
  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 Includes previously reported shares of common stock underlying RSUs granted to the Reporting Person, which are subject to certain vesting conditions. Amount of securities beneficially owned following reported transaction reflects the contribution of an aggregate of 400,000 shares previously owned indirectly by the reporting person to two grantor retained annuity trusts (each, a "GRAT"). 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.
RSU grant size 76,745 shares RSUs under 2023 Incentive Plan, vest over four years
Stock option grant 132,693 shares Option on common stock granted to CEO
Option exercise price $24.52/share Strike price for 132,693-share stock option
Option expiration 2036-04-16 Expiration date of new stock option grant
Direct common shares 735,739 shares Common stock directly held after reported awards
Living trust holdings 1,758,985 shares Common stock held by Emil Kakkis and Jenny Soriano Living Trust
GRAT contribution 400,000 shares Aggregate shares contributed to two grantor retained annuity trusts
GRAT holdings entry 200,000 shares Per GRAT holding shown, two such entries reported
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."
grantor retained annuity trusts financial
"contribution of an aggregate of 400,000 shares previously owned indirectly ... to two grantor retained annuity trusts"
A grantor retained annuity trust (GRAT) is an estate-planning tool where an owner transfers assets into a trust and receives fixed payments back for a set number of years; any remaining assets after that period pass to designated beneficiaries. For investors it matters because it can move future investment growth to heirs while potentially reducing gift and estate taxes — like putting a rising asset in a timed box that pays you first and gives the remaining upside to others.
Stock Option (Right to Buy) financial
"security_title: "Stock Option (Right to Buy)" with 132,693.0000 shares"
beneficially owned financial
"Amount of securities beneficially owned following reported transaction reflects the contribution"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
SEC Form 4
FORM 4UNITED 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*
KAKKIS EMIL D

(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)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
President & CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
04/16/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock04/16/2026A76,745(1)A$0735,739(2)D
Common Stock1,758,985(3)IBy Emil Kakkis and Jenny Soriano Living Trust, dated June 18, 200909
Common Stock200,000IBy GRAT
Common Stock200,000IBy GRAT
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)$24.5204/16/2026A132,693 (4)04/16/2036Common Stock132,693$0132,693D
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. Amount of securities beneficially owned following reported transaction reflects the contribution of an aggregate of 400,000 shares previously owned indirectly by the reporting person to two grantor retained annuity trusts (each, a "GRAT").
4. 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-fact04/20/2026
** Signature of Reporting PersonDate
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)

FAQ

What equity awards did Ultragenyx (RARE) CEO Emil Kakkis receive?

Emil Kakkis received 76,745 RSUs and a stock option for 132,693 shares at $24.52 per share. These awards are compensation grants under Ultragenyx’s 2023 Incentive Plan, with multi-year vesting rather than immediate cash transactions.

How do the new RSUs for Ultragenyx (RARE) CEO vest over time?

The 76,745 RSUs granted to Emil Kakkis vest in four equal annual installments. One quarter of the underlying shares vests on each anniversary of the grant date, so the RSUs become fully vested on the fourth anniversary of the grant.

What are the terms of Emil Kakkis’s new Ultragenyx stock option?

The new stock option covers 132,693 shares of common stock at an exercise price of $24.52 per share. Twenty-five percent vests on the first anniversary of the grant, then 1/48 vests monthly until expiration on 2036-04-16.

How many Ultragenyx (RARE) shares does Emil Kakkis hold directly after this filing?

After the reported transactions, Emil Kakkis directly holds 735,739 shares of Ultragenyx common stock. This figure reflects his updated direct ownership following the new RSU and stock option grants disclosed in the Form 4 filing.

What indirect Ultragenyx holdings are reported for Emil Kakkis?

The filing shows 1,758,985 shares of Ultragenyx held through the Emil Kakkis and Jenny Soriano Living Trust. It also notes an aggregate 400,000 shares contributed to two grantor retained annuity trusts (GRATs) as part of indirect beneficial ownership.

Did the Ultragenyx (RARE) CEO’s Form 4 show any open-market stock sales or purchases?

The Form 4 highlights equity awards and estate-planning transfers, not open-market trades. It reports RSU and stock option grants plus contributions of 400,000 shares to two GRATs, with no buy or sell transactions coded as open-market activity.