United Acquisition Corp. I filed a Schedule 13G reporting that Magnetar-related entities and an affiliated manager collectively hold 1,000,000 Class A ordinary shares. As of March 31, 2026, those Shares represent 9.56% of the issuer's outstanding Class A shares; the filing cites 10,459,580 Shares outstanding per the company's Form 10-K.
The statement clarifies ownership is across nine Magnetar funds, with shared voting and dispositive power over the 1,000,000 Shares. The filing is a joint Schedule 13G with accompanying power of attorney and joint filing agreement.
Positive
None.
Negative
None.
Insights
Magnetar group reports a ~9.6% passive stake in United Acquisition Corp. I.
The filing lists an aggregate holding of 1,000,000 shares held across specified Magnetar funds as of March 31, 2026, calculated as 9.56% of 10,459,580 Shares outstanding per the cited Form 10-K. Ownership is reported as shared voting and dispositive power among the reporting entities.
Because this is a Schedule 13G joint filing, it indicates passive/beneficial ownership reporting rather than an active acquisition disclosure; subsequent filings would show any change in intent or voting posture.
Filing structure shows coordinated reporting and authorized signatory arrangements.
The statement is a joint Schedule 13G signed under powers of attorney with a joint filing agreement. It names Magnetar Financial LLC as adviser and describes corporate relationships among Magnetar Capital Partners, Supernova Management, and Mr. Snyderman, supporting the shared power disclosures.
Material qualifiers and the as of March 31, 2026 time anchor are included; any change in purpose or ownership that removes passive status would require an amended filing.
Key Figures
Reported shares held:1,000,000 sharesPercent of class:9.56%Shares outstanding cited:10,459,580 shares+2 more
5 metrics
Reported shares held1,000,000 sharesAggregate beneficial ownership across Magnetar funds (as of 03/31/2026)
Percent of class9.56%Calculated pursuant to Rule 13d-3(d)(1)(i) (as of 03/31/2026)
Shares outstanding cited10,459,580 sharesIssuer's Form 10-K referenced in the filing (as of 03/31/2026)
Largest single fund allocation230,000 sharesHeld for Constellation Master Fund (as listed in the filing)
Other notable fund allocations210,000; 170,000; 170,000 sharesStructured Credit Fund (210,000), Lake Credit Fund (170,000), Alpha Star Fund (170,000)
"As of March 31, 2026, each of Magnetar... held 1,000,000 Shares"
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.
shared dispositive powerregulatory
"Shared Dispositive Power 1,000,000.00"
Rule 13d-3(d)(1)(i)regulatory
"represent approximately 9.56%... (calculated pursuant to Rule 13d-3(d)(1)(i))"
joint filing agreementlegal
"Exhibit Information 99.1 Joint Filing Agreement, dated as of May 13, 2026"
What stake does Magnetar report in United Acquisition Corp. I (UAC)?
Magnetar-related filers report beneficial ownership of 1,000,000 shares, equal to approximately 9.56% of Class A shares as of March 31, 2026. The filing references 10,459,580 Shares outstanding from the issuer's Form 10-K.
Which entities are named as reporting persons on the Schedule 13G for UAC?
The joint filing names Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman as Reporting Persons, with shared voting and dispositive power over the reported Shares.
How is the 1,000,000-share holding allocated among Magnetar funds?
The filing itemizes holdings: 230,000 Constellation Master Fund; 170,000 Lake Credit Fund; 210,000 Structured Credit Fund; 150,000 Xing He Master Fund; 170,000 Alpha Star Fund; and smaller allocations totaling 1,000,000 shares.
Does the Schedule 13G indicate who controls voting or disposition of the shares?
Yes. The filing states the Reporting Persons have shared voting power and shared dispositive power over the 1,000,000 Shares; sole voting and dispositive power are reported as 0 for each Reporting Person.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
UNITED ACQUISITION CORP. I
(Name of Issuer)
Class A ordinary shares, par value $0.0001
(Title of Class of Securities)
G92ALM108
(CUSIP Number)
03/31/2026
(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):
G92ALM108
1
Names of Reporting Persons
MAGNETAR FINANCIAL LLC
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
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,000,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,000,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,000,000.00
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)
9.56 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
G92ALM108
1
Names of Reporting Persons
MAGNETAR CAPITAL PARTNERS LP
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
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,000,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,000,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,000,000.00
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)
9.56 %
12
Type of Reporting Person (See Instructions)
HC, PN
SCHEDULE 13G
CUSIP Number(s):
G92ALM108
1
Names of Reporting Persons
SUPERNOVA MANAGEMENT LLC
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
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,000,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,000,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,000,000.00
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)
9.56 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
G92ALM108
1
Names of Reporting Persons
DAVID J. SNYDERMAN
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
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,000,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,000,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,000,000.00
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)
9.56 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
UNITED ACQUISITION CORP. I
(b)
Address of issuer's principal executive offices:
7100 W Camino Real Suite 302-48, Boca Raton, FL 33433
Item 2.
(a)
Name of person filing:
This statement is filed on behalf of each of the following person (collectively, the "Reporting Persons"):
i) Magnetar Financial LLC ("Magnetar Financial");
ii) Magnetar Capital Partners LP ("Magnetar Capital Partners");
iii) Supernova Management LLC ("Supernova Management"); and
iv) David J. Snyderman ("Mr. Snyderman").
This statement relates to the Shares (as defined herein) held for Magnetar Constellation Master Fund, Ltd ("Constellation Master Fund"), Magnetar Xing He Master Fund Ltd ("Xing He Master Fund"), Magnetar Capital Master Fund Ltd ("Capital Master Fund"), all Cayman Islands exempted companies; Magnetar Structured Credit Fund, LP ("Structured Credit Fund"), a Delaware limited partnership; Magnetar Alpha Star Fund LLC ("Alpha Star Fund"), Magnetar Lake Credit Fund LLC ("Lake Credit Fund"), Purpose Alternative Credit Fund - T LLC ("Purpose Alternative Credit Fund - T"), and Magnetar Waterfront Series A LLC ("Waterfront Series A Fund"), all Delaware limited liability companies; collectively (the "Magnetar Funds"). Magnetar Financial serves as the investment adviser to the Magnetar Funds, and as such, Magnetar Financial exercises voting and investment power over the Shares held for the Magnetar Funds' accounts. Magnetar Capital Partners serves as the sole member and parent holding company of Magnetar Financial. Supernova Management is the general partner of Magnetar Capital Partners. The administrative manager of Supernova Management is Mr. Snyderman.
(b)
Address or principal business office or, if none, residence:
The address of the principal business office of each of Magnetar Financial, Magnetar Capital Partners, Supernova Management, and Mr. Snyderman is 1603 Orrington Avenue, 13th Floor, Evanston, Illinois 60201.
(c)
Citizenship:
Place of Organization.
i) Magnetar Financial is a Delaware limited liability company;
ii) Magnetar Capital Partners is a Delaware limited partnership;
iii) Supernova Management is a Delaware limited liability company; and
iv) Mr. Snyderman is a citizen of the United States of America.
(d)
Title of class of securities:
Class A ordinary shares, par value $0.0001
(e)
CUSIP Number(s):
G92ALM108
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:
As of March 31, 2026, each of Magnetar Financial, Magnetar Capital Partners, Supernova Management and Mr. Snyderman held 1,000,000 Shares. The amount consists of (A) 230,000 Shares held for the account of Constellation Master Fund; (B) 170,000 Shares held for the account of Lake Credit Fund; (C) 210,000 Shares held for the account of Structured Credit Fund; (D) 150,000 Shares held for the account of Xing He Master Fund; (E) 170,000 Shares held for the account of Alpha Star Fund; (F) 10,000 Shares held for the account of Capital Master Fund; (G) 30,000 shares held for the account of Waterfront Series A Fund; and (H) 30,000 Shares held for the account Purpose Alternative Credit Fund - T.
The Shares held by the Magnetar Funds represent approximately 9.56% of the total number of Shares outstanding (calculated pursuant to Rule 13d-3(d)(1)(i)) of the outstanding shares of the Issuer).
(b)
Percent of class:
As of March 31, 2026, each of the Reporting Persons were deemed to be the beneficial owner constituting approximately 9.56% of the total number of shares outstanding (based upon the information provided by the Issuer in the Form 10-K filed on March 31, 2026 there were approximately 10,459,580 Shares outstanding).
(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:
1,000,000
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
1,000,000
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.
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.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
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.
MAGNETAR FINANCIAL LLC
Signature:
/s/ Hayley Stein
Name/Title:
Name:Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC
Date:
05/13/2026
MAGNETAR CAPITAL PARTNERS LP
Signature:
/s/ Hayley Stein
Name/Title:
Name:Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC
Date:
05/13/2026
SUPERNOVA MANAGEMENT LLC
Signature:
/s/ Hayley Stein
Name/Title:
Name:Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC
Date:
05/13/2026
DAVID J. SNYDERMAN
Signature:
/s/ Hayley Stein
Name/Title:
Name:Hayley Stein, Title: Attorney-in-fact for David J. Snyderman, Administrative Manager of Supernova Management LLC
Date:
05/13/2026
Comments accompanying signature: MAGNETAR FINANCIAL LLC BY: Magnetar Capital Partners LP, its Sole Member BY: Supernova Management LLC, its General Partner
MAGNETAR CAPITAL PARTNERS LP By: Supernova Management LLC, its General Partner
Exhibit Information
99.1 Joint Filing Agreement, dated as of May 13, 2026, among the Reporting Persons.
99.2 Power of Attorney, dated as of December 22, 2022 filed by the Reporting Persons on May 13, 2026.
