SUMA ACQUISITION CORP reports ownership by Magnetar group totaling 1,485,000 Class A ordinary shares. The filing states the Reporting Persons collectively hold 1,485,000 shares, representing 8.39% of outstanding shares. The ownership is shared voting and shared dispositive power across Magnetar entities as of March 31, 2026.
Positive
None.
Negative
None.
Insights
Magnetar funds hold a significant passive stake of 1.485M shares (8.39%).
The Schedule 13G shows 1,485,000 shares beneficially owned by Magnetar-related reporting persons as of March 31, 2026, calculated under Rule 13d-3. The position is reported as shared voting and shared dispositive power.
Cash‑flow treatment and any sale intentions are not stated in the excerpt; subsequent filings would disclose changes in holdings or if passive status shifts.
Ownership is held via multiple Magnetar funds and intermediaries with layered control.
The filing identifies the specific fund allocations (e.g., 356,400, 252,450, 326,700 shares) and clarifies advisory and control relationships among Magnetar Financial, Magnetar Capital Partners, Supernova Management, and Mr. Snyderman.
Voting/dispositive rights are reported as shared, which matters for governance voting scenarios; any change in voting or disposition arrangements would appear in amendment filings.
Key Figures
Magnetar shares held:1,485,000 sharesPercent of class:8.39%Issuer shares outstanding:17,696,250 shares+2 more
5 metrics
Magnetar shares held1,485,000 sharesBeneficial ownership as of <date>March 31, 2026</date>
Percent of class8.39%Calculated pursuant to Rule 13d-3 based on issuer data
Issuer shares outstanding17,696,250 sharesIssuer-provided figure referenced from Form 8-K filed March 13, 2026
Allocation example — Constellation Master Fund356,400 sharesPortion of the 1,485,000 held for Constellation Master Fund
Allocation example — Structured Credit Fund326,700 sharesPortion of the 1,485,000 held for Structured Credit Fund
"As of March 31, 2026, each of Magnetar Financial... held 1,485,000 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 power to dispose or to direct the disposition: 1,485,000"
Rule 13d-3regulatory
"represent approximately 8.39% of the total number of Shares outstanding (calculated pursuant to Rule 13d-3(d)(1)(i))"
Rule 13d-3 defines who is treated as the beneficial owner of a company’s shares for U.S. securities disclosure rules — essentially anyone who has the power to vote or direct how shares are voted, or the power to buy or sell them, even if they don’t hold the certificates. For investors this matters because crossing certain ownership thresholds triggers public filing and disclosure obligations and signals potential control or influence, much like having the keys to a car implies you can drive it even if it’s registered to someone else.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
SUMA ACQUISITION CORP
(Name of Issuer)
Class A ordinary shares, par value $0.0001
(Title of Class of Securities)
G8557R129
(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):
G8557R129
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
1,485,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,485,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,485,000.00
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)
8.39 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
G8557R129
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
1,485,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,485,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,485,000.00
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)
8.39 %
12
Type of Reporting Person (See Instructions)
HC, PN
SCHEDULE 13G
CUSIP Number(s):
G8557R129
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
1,485,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,485,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,485,000.00
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)
8.39 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
G8557R129
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
1,485,000.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,485,000.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,485,000.00
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)
8.39 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
SUMA ACQUISITION CORP
(b)
Address of issuer's principal executive offices:
177 Manning Avenue Toronto, Z4 M6J2K6
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"), 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):
G8557R129
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 1,485,000 Shares. The amount consists of (A) 356,400 Shares held for the account of Constellation Master Fund; (B) 252,450 Shares held for the account of Lake Credit Fund; (C) 326,700 Shares held for the account of Structured Credit Fund; (D) 237,600 Shares held for the account of Xing He Master Fund; (E) 252,450 Shares held for the account of Alpha Star Fund; (F) 14,850 Shares held for the account of Capital Master Fund; and (G) 44,550 shares held for the account of Waterfront Series A Fund.
The Shares held by the Magnetar Funds represent approximately 8.39% 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 8.39% of the total number of shares outstanding (based upon the information provided by the Issuer in the Form 8-K filed on March 13, 2026 there were approximately 17,696,250 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:
1,485,000
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
1,485,000
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.
What stake does Magnetar report in SUMA Acquisition Corp (SUMA)?
Magnetar reports beneficial ownership of 1,485,000 shares, representing 8.39% of SUMA's Class A ordinary shares as of March 31, 2026. The shares are held across multiple Magnetar funds and reported on a Schedule 13G.
How is Magnetar's voting power described in the Schedule 13G?
The filing reports 0 sole voting power and 1,485,000 shared voting power, indicating that voting authority is shared among the Reporting Persons for the disclosed shares as of March 31, 2026.
What funds hold the reported SUMA shares within the Magnetar group?
The shares are allocated across named funds including Constellation Master Fund (356,400), Lake Credit Fund (252,450), Structured Credit Fund (326,700), and others, totaling 1,485,000 shares as shown in the filing.
What total outstanding share count does the filing reference for SUMA?
The filing cites the issuer's disclosure that there were approximately 17,696,250 shares outstanding, a figure reported by the issuer in a Form 8-K referenced in this Schedule 13G.
Does the Schedule 13G indicate Magnetar will sell shares?
No sale instruction is included. The Schedule 13G reports passive beneficial ownership and shared power; it does not state any planned dispositions or sales in the provided excerpt.
