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Ultragenyx Pharmaceutical Inc. (RARE) was the issuer in a Schedule 13G reporting beneficial ownership by State Street Corporation and SSGA Funds Management, Inc. as of September 30, 2026. State Street reported 7,538,078 shares, or 7.6% of the class, with shared voting power over 7,245,178 shares and shared dispositive power over 7,538,078 shares.
SSGA Funds Management reported 5,318,630 shares, or 5.4%, with shared voting power over 5,303,530 shares and shared dispositive power over 5,318,630 shares. Each reporting person reported zero sole voting and sole dispositive power; the ownership amounts are stated separately for each reporting person.
Key Figures
State Street beneficial ownership:7,538,078 sharesState Street percentage of class:7.6%State Street shared voting power:7,245,178 shares+5 more
8 metrics
State Street beneficial ownership7,538,078 sharesAs of September 30, 2026
State Street percentage of class7.6%As of September 30, 2026
State Street shared voting power7,245,178 sharesAs of September 30, 2026
State Street shared dispositive power7,538,078 sharesAs of September 30, 2026
SSGA Funds Management beneficial ownership5,318,630 sharesAs of September 30, 2026
SSGA Funds Management percentage of class5.4%As of September 30, 2026
SSGA Funds Management shared voting power5,303,530 sharesAs of September 30, 2026
SSGA Funds Management shared dispositive power5,318,630 sharesAs of September 30, 2026
Key Terms
Aggregate Amount Beneficially Owned, Shared Voting Power, Shared Dispositive Power
3 terms
Aggregate Amount Beneficially Ownedfinancial
"Aggregate Amount Beneficially Owned by Each Reporting Person"
Shared Voting Powerfinancial
"Shared Voting Power 7,245,178.00"
Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.
Shared Dispositive Powerfinancial
"Shared Dispositive Power 7,538,078.00"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many RARE shares did State Street report beneficially owning?
State Street Corporation reported beneficial ownership of 7,538,078 shares, or 7.6% of the class, as of September 30, 2026. It reported shared voting power over 7,245,178 shares and shared dispositive power over 7,538,078 shares.
How many RARE shares did SSGA Funds Management report?
SSGA Funds Management, Inc. reported beneficial ownership of 5,318,630 shares, or 5.4% of the class, as of September 30, 2026. It reported shared voting power over 5,303,530 shares and shared dispositive power over 5,318,630 shares.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
ULTRAGENYX PHARMACEUTICAL INC
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
90400D108
(CUSIP Number)
09/30/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
90400D108
1
Names of Reporting Persons
STATE STREET CORPORATION
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
7,245,178.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
7,538,078.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,538,078.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
7.6 %
12
Type of Reporting Person (See Instructions)
HC
SCHEDULE 13G
CUSIP Number(s):
90400D108
1
Names of Reporting Persons
SSGA FUNDS MANAGEMENT, INC.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
MASSACHUSETTS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
5,303,530.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
5,318,630.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
5,318,630.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
5.4 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
ULTRAGENYX PHARMACEUTICAL INC
(b)
Address of issuer's principal executive offices:
60 LEVERONI COURT, NOVATO, CALIFORNIA, 94949
Item 2.
(a)
Name of person filing:
SSGA FUNDS MANAGEMENT, INC.;STATE STREET CORPORATION;
(b)
Address or principal business office or, if none, residence:
ONE CONGRESS STREET, SUITE 1, BOSTON MA 02114, UNITED STATES (FOR ALL REPORTING PERSONS)
(c)
Citizenship:
MA
(d)
Title of class of securities:
COMMON STOCK
(e)
CUSIP Number(s):
90400D108
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
7538078.00
(b)
Percent of class:
7.6 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
0
(ii) Shared power to vote or to direct the vote:
7,245,178
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
7,538,078
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
NOT APPLICABLE
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary.
SSGA FUNDS MANAGEMENT, INC. (IA);STATE STREET GLOBAL ADVISORS EUROPE LIMITED (IA);STATE STREET GLOBAL ADVISORS LIMITED (IA);STATE STREET GLOBAL ADVISORS TRUST COMPANY (IA);STATE STREET GLOBAL ADVISORS, LTD. (IA);
Item 8.
Identification and Classification of Members of the Group.
If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group.
NOT APPLICABLE
Item 9.
Notice of Dissolution of Group.
Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5.
NOT APPLICABLE
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
