KENSINGTON CAPITAL ACQUISITION CORP. Class A ordinary shares: a group of Magnetar-related entities and an individual reporter disclose shared beneficial ownership of 1,549,399 shares, representing approximately 6.73% of the outstanding Class A shares as of March 31, 2026. The holdings are held across multiple Magnetar funds with shared voting and dispositive power and reflect the reporting persons' advisory and control relationships described in the filing.
The filing lists the underlying fund-level breakdown and states the issuer reported approximately 23,000,000 shares outstanding in a prior Form 8-K referenced in the statement.
Positive
None.
Negative
None.
Insights
Magnetar-affiliated entities report a material passive stake with shared control.
The filing shows combined beneficial ownership of 1,549,399 shares (about 6.73%) across seven Magnetar funds as of March 31, 2026. Ownership is reported as shared voting and dispositive power held by the listed Reporting Persons.
Key dependencies include the adviser relationship and the ownership structure: Magnetar Financial acts as investment adviser, Magnetar Capital Partners is the sole member, and Supernova Management and Mr. Snyderman are described in the control chain. Future disclosures or transactions by these holders would be reported separately.
Key Figures
Beneficially owned shares:1,549,399 sharesPercent of class:6.73%Shares outstanding:23,000,000 shares+3 more
6 metrics
Beneficially owned shares1,549,399 sharesAs of March 31, 2026; combined Magnetar-related reporting persons
Percent of class6.73%Calculated pursuant to Rule 13d-3(d)(1)(i) as of March 31, 2026
Shares outstanding23,000,000 sharesIssuer figure cited from Form 8-K referenced in the filing (March 5, 2026)
Constellation Master Fund holdings371,855 sharesComponent of the 1,549,399 total
Structured Credit Fund holdings340,868 sharesComponent of the 1,549,399 total
Alpha Star & Lake Credit Fund holdings263,398 shares eachEach listed as a component of the total holdings
"As of March 31, 2026, each of Magnetar Financial...held 1,549,399 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 dispositional power: 1,549,399"
Schedule 13Gregulatory
"Item 1. (a) Name of issuer: KENSINGTON CAPITAL ACQUISITION CORP."
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
Joint Filing Agreementlegal
"Exhibit Information 99.1 Joint Filing Agreement, dated as of May 13, 2026"
Magnetar-related reporting persons state beneficial ownership of 1,549,399 shares, equal to about 6.73% of KCA's Class A ordinary shares as of March 31, 2026. The stake is held across multiple Magnetar funds and reported jointly.
How is the 1,549,399-share position allocated among Magnetar funds?
The filing discloses the fund-level split: 371,855 (Constellation Master Fund), 263,398 (Lake Credit Fund), 340,868 (Structured Credit Fund), 247,904 (Xing He Master Fund), 263,398 (Alpha Star Fund), 15,494 (Capital Master Fund), and 46,482 (Waterfront Series A Fund), totaling the reported shares.
Does Magnetar have voting control over the reported shares?
The filing states each Reporting Person has shared voting power and shared dispositive power over the 1,549,399 shares and 0 sole voting or dispositive power. Control flows from adviser and ownership relationships described in the filing.
What outstanding share base does the filing reference to calculate 6.73%?
The percentage is calculated using an issuer-provided figure from a referenced Form 8-K: approximately 23,000,000 Shares outstanding as stated in the filing dated March 5, 2026, per the Schedule 13G excerpt.
Who signed the Schedule 13G on behalf of the reporting persons?
The Schedule 13G is signed under power of attorney by Hayley Stein as attorney-in-fact for David J. Snyderman, administrative manager of Supernova Management LLC, with accompanying joint filing and power of attorney exhibits dated May 13, 2026.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
KENSINGTON CAPITAL ACQUISITION CORP. VI
(Name of Issuer)
Class A ordinary shares, par value $0.0001
(Title of Class of Securities)
G52519108
(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):
G52519108
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
1,549,399.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,549,399.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,549,399.00
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)
6.73 %
12
Type of Reporting Person (See Instructions)
IA, OO
SCHEDULE 13G
CUSIP Number(s):
G52519108
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
1,549,399.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,549,399.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,549,399.00
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)
6.73 %
12
Type of Reporting Person (See Instructions)
HC, PN
SCHEDULE 13G
CUSIP Number(s):
G52519108
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
1,549,399.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,549,399.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,549,399.00
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)
6.73 %
12
Type of Reporting Person (See Instructions)
HC, OO
SCHEDULE 13G
CUSIP Number(s):
G52519108
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
1,549,399.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,549,399.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,549,399.00
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)
6.73 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
KENSINGTON CAPITAL ACQUISITION CORP. VI
(b)
Address of issuer's principal executive offices:
1400 Old Country Road, Suite 301, Westbury, NY 11590
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"), and 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):
G52519108
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 1,549,399 Shares. The amount consists of (A) 371,855 Shares held for the account of Constellation Master Fund; (B) 263,398 Shares held for the account of Lake Credit Fund; (C) 340,868 Shares held for the account of Structured Credit Fund; (D) 247,904 Shares held for the account of Xing He Master Fund; (E) 263,398 Shares held for the account of Alpha Star Fund; (F) 15,494 Shares held for the account of Capital Master Fund; and (G) 46,482 shares held for the account of Waterfront Series A Fund.
The Shares held by the Magnetar Funds represent approximately 6.73% 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 6.73% of the total number of shares outstanding (based upon the information provided by the Issuer in the Form 8-K filed on March 5, 2026 there were approximately 23,000,000 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:
1,549,399
(iii) Sole power to dispose or to direct the disposition of:
0
(iv) Shared power to dispose or to direct the disposition of:
1,549,399
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.
