Mizuho Financial Group (LKSP) reports 8.1% ownership of Lake Superior Acquisition Corp.

Rhea-AI Filing Summary

Mizuho Financial Group reports an 8.1% beneficial stake in Lake Superior Acquisition Corp. The filing states Mizuho (through affiliates) beneficially owns 964,587 common shares of Lake Superior Acquisition Corp., CUSIP G5354C107, with sole voting and dispositive power over those shares. The filing identifies Mizuho Securities USA LLC as the subsidiary holding the shares and includes an attribution comment linking Mizuho Financial Group, Mizuho Bank and Mizuho Americas LLC to that indirect ownership.

Insights

Institutional Ownership Analyst

Mizuho holds a sizable passive stake reported via Schedule 13G.

The filing lists 964,587 shares representing 8.1% of the class as beneficially owned, with sole voting and dispositive power. This characterizes the position as an equity stake reported under the ownership schedule rather than an active acquisition announcement.

Future disclosure may show whether this stake is strategic; subsequent filings would reveal changes in percent ownership or any shift to an active/beneficial control posture.

Corporate Governance Expert

Attribution through a U.S. subsidiary and parent holding disclosures are included.

The schedule identifies Mizuho Securities USA LLC as the direct holder and lists affiliated entities that "may be deemed" indirect beneficial owners. The filing includes a parent holding company certification regarding comparable foreign regulatory schemes.

Watch for any amendments or Schedule 13D that would indicate activist intent; the current filing stays within passive ownership reporting conventions.

Key Figures

Beneficial ownership: 964,587 shares Percent of class: 8.1% CUSIP: G5354C107 +2 more

5 metrics

Beneficial ownership 964,587 shares reported in Schedule 13G

Percent of class 8.1% percent of common shares reported

CUSIP G5354C107 Lake Superior Acquisition Corp. common shares

Reference date 03/31/2026 date shown near filing header

Filing signature date 05/14/2026 signature date on the Schedule 13G

Key Terms

Schedule 13G, Beneficially owned, Sole dispositive power, Parent Holding Company

4 terms

Schedule 13G regulatory

"Item 1. (a) Name of issuer: Lake Superior 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.

Beneficially owned regulatory

"Item 4. (a) Amount beneficially owned: 964,587"

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.

Sole dispositive power regulatory

"Item 4. (c)(iii) Sole power to dispose or to direct the disposition of: 964,587"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Parent Holding Company regulatory

"Item 2. (b) Parent Holding Company referenced for Mizuho"

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Accepted by SEC EDGAR 05/14/2026 - 06:08 AM Learn about SEC filing dates

FAQ

What stake does Mizuho Financial Group report in Lake Superior Acquisition Corp. (LKSP)?

Mizuho reports beneficial ownership of 964,587 shares, equal to 8.1% of Lake Superior Acquisition Corp.'s common shares. The filing attributes sole voting and dispositive power over the listed shares to Mizuho.

Which entity directly holds the Lake Superior Acquisition Corp. shares for Mizuho?

The filing identifies Mizuho Securities USA LLC as the direct U.S. subsidiary holding the shares. Affiliates named include Mizuho Bank and Mizuho Americas LLC as potential indirect beneficial owners.

What date and CUSIP are associated with the reported holdings in the filing?

The document references 03/31/2026 near the top and cites CUSIP G5354C107 for Lake Superior Acquisition Corp.'s common shares. The signature date on the filing is 05/14/2026.

Does this Schedule 13G filing indicate control or activist intentions by Mizuho?

The filing reports beneficial ownership with sole voting and dispositive power for the listed shares but is submitted as a Schedule 13G; it does not, by itself, state activist intent. Any change to an active intent would typically appear in an amendment or Schedule 13D.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Lake Superior Acquisition Corp.

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G5354C107

(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): G5354C107

1

Names of Reporting Persons

Mizuho Financial Group, 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

JAPAN

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 964,587.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 964,587.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

964,587.00

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)

8.1 %

12

Type of Reporting Person (See Instructions)

FI

Comment for Type of Reporting Person: Mizuho Financial Group, Inc., Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed to be indirect beneficial owners of said equity securities directly held by Mizuho Securities USA LLC which is their wholly-owned subsidiary.

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Lake Superior Acquisition Corp.
(b)	Address of issuer's principal executive offices: 521 Fifth Avenue 17th Floor, New York, NY, 10175
Item 2.
(a)	Name of person filing: Mizuho Financial Group, Inc.
(b)	Address or principal business office or, if none, residence: 1-5-5, Otemachi, Chiyoda-ku, Tokyo, 100-8176, Japan
(c)	Citizenship: Japan
(d)	Title of class of securities: Common Shares
(e)	CUSIP Number(s): G5354C107
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).
	Parent Holding Company
Item 4.	Ownership
(a)	Amount beneficially owned: 964,587
(b)	Percent of class: 8.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 964,587
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 964,587
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	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. See Exhibit A
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. By signing below I certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to Parent Holding Company is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I also undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

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.

Mizuho Financial Group, Inc.

Signature:	/s/ Takahiro Katsura
Name/Title:	Takahiro Katsura, Managing Director, Global Corporate Function Coordination Department
Date:	05/14/2026