Company: MLAC
Filing Date: 2025-12-05
Form Type: 425
Source: 0001213900-25-118705
Chunk: 0

Company: Mountain Lake Acquisition Corp.
Filing Date: 2025-12-05
Form: 425
Chunk 0
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Filed by Mountain Lake Acquisition Corp.

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-12

under the Securities Exchange Act of 1934

Subject Company: Mountain Lake Acquisition Corp.

Commission File No. 001-42436

Avalanche Treasury Corporation

Date: December 5, 2025

As previously disclosed, on October 1, 2025, Mountain
Lake Acquisition Corp., a Cayman Islands exempt company (“Mountain Lake” or “SPAC”), and Avalanche Treasury Corporation,
a Delaware corporation (“Pubco”), issued a press release announcing that they had entered into a Business Combination Agreement
(the “Business Combination Agreement”), dated as of October 1, 2025, with Avalanche SPAC Merger Sub LLC, a Delaware limited
liability company (“SPAC Merger Sub”), Avalanche Company Merger Sub LLC, a Delaware limited liability company (the “Company
Merger Sub”), Avalanche Treasury Company LLC, a Delaware limited liability company (“Newco”), and Dragonfly Digital
Management, LLC, a Delaware limited liability company (the “Seller”).

The following communication was made by Pubco
on its X account on November 21, 2025.

<div align='center'>The following communication was made by Pubco on
its X and LinkedIn accounts on November 24, 2025.</div>

Additional Information and Where to Find It

Pubco and Newco intend
to file with the Securities and Exchange Commission (the “SEC”) a Registration Statement on Form S-4 (as may be amended, the
“Registration Statement”), which will include a preliminary proxy statement of Mountain Lake and a prospectus (the “Proxy
Statement/Prospectus”) in connection with the business combination (“Business Combination”) between Mountain Lake, Pubco
and Newco and concurrent private placement of Newco units (the “Private Placement”, together with the Business Combination,
the “Proposed Transactions”). The definitive proxy statement and other relevant documents will be mailed to shareholders of
Mountain Lake as of a record date to be established for voting on the Business Combination and other matters as described in the Proxy
Statement/Prospectus. Mountain Lake and/or Pubco will also file other documents regarding the Proposed Transactions with the SEC. This
communication does not contain all of the information that should be considered concerning the Proposed Transactions and is not intended
to form the basis of any investment decision or any other decision in respect of the Proposed