[SCHEDULE 13G/A] Mountain Lake Acquisition Corp. Units SEC Filing

Rhea-AI Filing Summary

Bank of Montreal group discloses 6.51% passive stake in Mountain Lake Acquisition Corp. (MLACU)

Amendment No. 2 to Schedule 13G shows that, as of 30 Jun 2025, Bank of Montreal (BMO) and affiliates Bank of Montreal Holding Inc. and BMO Nesbitt Burns Inc. beneficially own 1,549,303 Class A ordinary shares of Mountain Lake Acquisition Corp., representing 6.51 % of the outstanding class.

• Sole voting & disposition: 69,303 shares held directly by Bank of Montreal.
• Shared voting & disposition: 1,480,000 shares jointly reported by all three entities.
• All reporting persons are Canadian federally chartered institutions; filing made under Rule 13d-1(b) indicating passive investment status.
• Shares are held in the ordinary course of business as prime broker for clients; the group certifies no intent to influence control.
• Certification signed by Managing Director Kathryn Cenac on 01 Aug 2025.

Positive

• BMO group reports ownership of 6.51 % (1.55 M shares) of MLACU, adding a sizeable institutional holder to the share register.

Negative

• None.

Insights

Securities Analyst

TL;DR: Passive 6.5 % holding; limited price impact, modest vote concentration.

The BMO group’s 1.55 M-share position crosses the 5 % threshold, requiring public disclosure. Because the stake is reported on Schedule 13G—rather than 13D—it signals a passive, non-activist posture. Institutional ownership now shifts modestly toward a single prime-broker platform, but the bulk (1.48 M) is client-directed, reducing the likelihood of coordinated voting. Overall market impact should be neutral: the filing neither adds strategic capital nor signals imminent divestiture. The information is still useful for liquidity analysis, indicating that roughly one-fourteenth of the float sits within BMO’s brokerage network.

Corporate Governance Expert

TL;DR: No governance implications; control intent expressly disclaimed.

The amendment reaffirms that BMO and its affiliates act solely as intermediary custodians. Their certification and 13G classification confirm absence of control ambitions, proxy contests, or board influence attempts. Therefore, governance risk remains unchanged. From a compliance standpoint, timely amendment filing demonstrates adherence to SEC beneficial-ownership rules.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 2)

Mountain Lake Acquisition Corp.

(Name of Issuer)

Class A ordinary shares, par value $0.0001 per share

(Title of Class of Securities)

G6301B101

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. G6301B101

1

Names of Reporting Persons

BANK OF MONTREAL

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

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 69,303.00
6	Shared Voting Power 1,480,000.00
7	Sole Dispositive Power 69,303.00
8	Shared Dispositive Power 1,480,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,549,303.00

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)

6.51 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP No. G6301B101

1

Names of Reporting Persons

BANK OF MONTREAL HOLDING 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

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,480,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,480,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,480,000.00

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)

6.22 %

12

Type of Reporting Person (See Instructions)

BK

SCHEDULE 13G

CUSIP No. G6301B101

1

Names of Reporting Persons

BMO NESBITT BURNS 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

CANADA (FEDERAL LEVEL)

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 1,480,000.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,480,000.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,480,000.00

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)

6.22 %

12

Type of Reporting Person (See Instructions)

BD

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, NEVADA 89451
Item 2.
(a)	Name of person filing: BANK OF MONTREAL BANK OF MONTREAL HOLDING INC. BMO NESBITT BURNS INC.
(b)	Address or principal business office or, if none, residence: 1 First Canadian Place Toronto, Ontario, Canada M5X1A1
(c)	Citizenship: BANK OF MONTREAL - CANADA (FEDERAL LEVEL) BANK OF MONTREAL HOLDING INC. - CANADA (FEDERAL LEVEL) BMO NESBITT BURNS INC. - CANADA (FEDERAL LEVEL)
(d)	Title of class of securities: Class A ordinary shares, par value $0.0001 per share
(e)	CUSIP No.: 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).
Item 4.	Ownership
(a)	Amount beneficially owned: 1,549,303
(b)	Percent of class: 6.51 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: BANK OF MONTREAL - 69,303 BANK OF MONTREAL HOLDING INC. - 0 BMO NESBITT BURNS INC. - 0
	(ii) Shared power to vote or to direct the vote: BANK OF MONTREAL - 1,480,000 BANK OF MONTREAL HOLDING INC. - 1,480,000 BMO NESBITT BURNS INC. - 1,480,000
	(iii) Sole power to dispose or to direct the disposition of: BANK OF MONTREAL - 69,303 BANK OF MONTREAL HOLDING INC. - 0 BMO NESBITT BURNS INC. - 0
	(iv) Shared power to dispose or to direct the disposition of: BANK OF MONTREAL - 1,480,000 BANK OF MONTREAL HOLDING INC. - 1,480,000 BMO NESBITT BURNS INC. - 1,480,000
Item 5.	Ownership of 5 Percent or Less of a Class.
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The securities reported herein are held in the ordinary course of business of the Reporting Person acting as prime broker on behalf of certain clients who have the power to direct the receipt of dividends from, or the proceeds from the sale of such securities.
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 Documents.
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Each reporting person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for the purposes of Section 13(d) or 13(g) of the Act. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act) with any other person as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the issuer or otherwise with respect to the issuer or any securities of the issuer or (ii) a member of any syndicate or group with respect to the issuer or any securities of the issuer.
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. Each reporting person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for the purposes of Section 13(d) or 13(g) of the Act. Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act) with any other person as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the issuer or otherwise with respect to the issuer or any securities of the issuer or (ii) a member of any syndicate or group with respect to the issuer or any securities of the issuer.

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.

BANK OF MONTREAL

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	08/01/2025

BANK OF MONTREAL HOLDING INC.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	08/01/2025

BMO NESBITT BURNS INC.

Signature:	Kathryn Cenac
Name/Title:	Managing Director - Regulatory Solutions Group
Date:	08/01/2025

FAQ

How many Mountain Lake Acquisition Corp. shares does Bank of Montreal own?

The group reports beneficial ownership of 1,549,303 Class A shares.

What percentage of MLACU's Class A shares is held by BMO and affiliates?

Their stake represents 6.51 % of the outstanding Class A shares.

Does the Schedule 13G filing indicate any intent to influence control of MLACU?

No. The filing is on Schedule 13G and includes a certification that the securities are held passively and not for control purposes.

Why was this amendment to Schedule 13G filed?

Crossing the 5 % ownership threshold and subsequent ownership changes require disclosure; this is Amendment No. 2 updating those holdings.

What is the event date that triggered the filing requirement?

The relevant event date is 30 June 2025.