Mizuho (MLAC) reports 1.71M shares, 7.2% stake (Schedule 13G)

Rhea-AI Filing Summary

Mizuho Financial Group, Inc. filed a Schedule 13G reporting beneficial ownership of 1,710,141 common shares of Mountain Lake Acquisition Corp. (CUSIP G6301B101), representing 7.2% of the class as of 03/31/2026. The filing is made by the parent holding company and notes that Mizuho Securities USA LLC is the direct holder through which indirect ownership is claimed.

Insights

Securities Compliance Lawyer

Schedule 13G filed by a parent holding company reporting >5% ownership.

The filing states 1,710,141 shares (7.2%) as of 03/31/2026 and is signed by a Mizuho officer on 05/14/2026. It identifies the parent/wholly-owned subsidiary relationship used to claim indirect ownership.

Ownership above 5% typically triggers Schedule 13G/13D disclosure requirements; the filing identifies the relevant subsidiary and asserts comparability of the foreign regulatory scheme. Subsequent filings would show any change in ownership status.

Equity Capital Markets Analyst

Disclosure indicates a notable passive stake without transaction detail.

The document lists exact holdings: 1,710,141 shares, 7.2% of the class (CUSIP G6301B101). It classifies the filer as a parent holding company and cites Mizuho Securities USA LLC as the direct holder.

There is no price, acquisition date, or planned disposition disclosed here; any trading activity or intent would appear in later filings if applicable.

Key Figures

Shares beneficially owned: 1,710,141 shares Percent of class: 7.2% CUSIP: G6301B101 +2 more

5 metrics

Shares beneficially owned 1,710,141 shares reported as of 03/31/2026

Percent of class 7.2% percentage of Mountain Lake Acquisition common shares

CUSIP G6301B101 Mountain Lake Acquisition Corp. common shares

Filing type Schedule 13G beneficial ownership disclosure

Signature date 05/14/2026 signed by Takahiro Katsura, Managing Director

Key Terms

Schedule 13G, Parent Holding Company, Beneficial ownership, Sole power to vote

4 terms

Schedule 13G regulatory

"Mizuho Financial Group, Inc. filed a Schedule 13G reporting beneficial ownership"

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.

Parent Holding Company regulatory

"Parent Holding Company Item 4. Ownership (a) Amount beneficially owned"

Beneficial ownership financial

"Amount beneficially owned: 1,710,141 (b) Percent of class: 7.2 %"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole power to vote regulatory

"(i) Sole power to vote or to direct the vote: 1,710,141"

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/14/2026 - 06:28 AM Learn about SEC filing dates

FAQ

What stake does Mizuho Financial Group report in MLAC?

Mizuho reports beneficial ownership of 1,710,141 common shares, equal to 7.2% of Mountain Lake Acquisition Corp.'s class as of 03/31/2026. The shares are directly held by a Mizuho subsidiary.

Which entity holds the Mountain Lake shares for Mizuho?

The filing states the shares are directly held by Mizuho Securities USA LLC, a wholly-owned subsidiary, with Mizuho Financial Group claiming indirect beneficial ownership through that subsidiary.

Does the Schedule 13G disclose when Mizuho bought the shares?

The Schedule 13G excerpt does not provide acquisition dates or purchase prices. It reports the amount (1,710,141) and percent (7.2%) as of 03/31/2026 without transaction timing details.

Who certified the Schedule 13G for Mizuho and when?

The filing is signed by Takahiro Katsura, Managing Director, and the signature is dated 05/14/2026, certifying the statements in the Schedule 13G.

What CUSIP identifies Mountain Lake Acquisition Corp. common shares?

The Schedule 13G lists the common shares under CUSIP G6301B101. The filing ties the disclosed 1,710,141 shares and 7.2% ownership to that CUSIP.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Mountain Lake Acquisition Corp.

(Name of Issuer)

Common Shares

(Title of Class of Securities)

G6301B101

(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): G6301B101

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 1,710,141.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,710,141.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,710,141.00

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)

7.2 %

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: Mountain Lake Acquisition Corp.
(b)	Address of issuer's principal executive offices: 930 Tahoe Blvd STE 802 PMB 45, Incline Village, NV 89451
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): G6301B101
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: 1,710,141
(b)	Percent of class: 7.2 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,710,141
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,710,141
	(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