# EDGAR Filing Document

**Accession Number:** 0001844822
**File Stem:** 0001213900-26-068803
**Filing Date:** 2026-6
**Character Count:** 8027
**Document Hash:** 07d9840c4366198fd0d7eac5bccff567
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-068803.hdr.sgml**: 20260615

**ACCESSION NUMBER**: 0001213900-26-068803

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260611

**FILED AS OF DATE**: 20260615

**DATE AS OF CHANGE**: 20260615

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Marquez Michael J.
- **CENTRAL INDEX KEY:** 0001844822

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-42436
- **FILM NUMBER:** 261091042

**MAIL ADDRESS:**
- **STREET 1:** 8390 E. VIA DE VENTURA, SUITE F110-207
- **CITY:** SCOTTSDALE
- **STATE:** AZ
- **ZIP:** 85258
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Mountain Lake Acquisition Corp.
- **CENTRAL INDEX KEY:** 0002029492
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 981796213
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 930 TAHOE BLVD
- **STREET 2:** STE 802 PMB 45
- **CITY:** INCLINE VILLAGE
- **STATE:** NV
- **ZIP:** 89451
- **BUSINESS PHONE:** (775) 204-1489

**MAIL ADDRESS:**
- **STREET 1:** 930 TAHOE BLVD
- **STREET 2:** STE 802 PMB 45
- **CITY:** INCLINE VILLAGE
- **STATE:** NV
- **ZIP:** 89451

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[x] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Marquez Michael J.<br><sub>(Last) (First) (Middle)</sub><br>C/O MOUNTAIN LAKE ACQUISITION CORP.<br>930 TAHOE BLVD STE 802 PMB 45<br><sub>(Street)</sub><br>INCLINE VILLAGE, NV 89451<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-06-11 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Mountain Lake Acquisition Corp. [ MLAC ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Class A ordinary shares, par value $0.0001 per share | 2026-06-11 |  | M<sup>(2)</sup> |  | 9112 | A | <sup>(2)</sup> | 9112 | D |  |
| Class A ordinary shares, par value $0.0001 per share | 2026-06-11 |  | D |  | 9112 | D | <sup>(3)</sup> | 0 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Class B ordinary shares, par value $0.0001 per share | <sup>(1)</sup> | 2026-06-11 |  | D<sup>(1)</sup> |  |  | 15888 | <sup>(2)</sup> | <sup>(2)</sup> | Class A ordinary shares | 15888 | <sup>(1)</sup> | 9112 | D |  |
| Class B ordinary shares, par value $0.0001 per share | <sup>(2)</sup> | 2026-06-11 |  | M<sup>(2)</sup> |  |  | 9112 | <sup>(2)</sup> | <sup>(2)</sup> | Class A ordinary shares | 9112 | <sup>(2)</sup> | 0 | D |  |

---

### Footnotes:

(1) On June 11, 2026, in connection with the consummation of the transactions contemplated by the Business Combination Agreement dated October 1, 2025 (as amended on January 13, 2026 and March 17, 2026, the "Business Combination Agreement" and the transactions contemplated thereto, the "Business Combination"), by and among the Issuer, Avalanche Treasury Corporation, a Delaware corporation ("Pubco") and the other parties thereto, and certain Sponsor Support Agreement dated as of October 1, 2025, by and among the Issuer, Pubco and Mountain Lake Acquisition Sponsor LLC (the "Sponsor"), an aggregate of 15,888 Class B ordinary shares held by the Reporting Person were surrendered for cancellation by the Reporting Person to the Issuer for no consideration.

(2) As described in the registration statement on Form S-1 (File No. 333-281410) of the Issuer under the heading "Description of Securities--Founder Shares," the Class B ordinary shares will automatically convert into Class A ordinary shares at the time of the Issuer's initial business combination, or at any time prior to the Issuer's initial business combination, at the option of the holder, on a one-for-one basis, subject to certain adjustments. In connection with the consummation of the Business Combination, and immediately following the surrender, 9,112 Class B ordinary shares were converted into an aggregate of 9,112 Class A ordinary shares (the "Class B Conversion"). Following the Class B Conversion, the Reporting Person owns zero Class B ordinary shares.

(3) In connection with the SPAC Merger (as defined in the Business Combination Agreement), an aggregate of 9,112 Class A ordinary shares held by the Reporting Person were exchanged into an equal number of shares of Class A common stock, par value $0.01 per share, of Pubco. Following such transaction, the Reporting Person owns zero Class A ordinary shares.

**Signature:** /s/ Michael J. Marquez  
**Date:** 2026-06-15

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**