Mountain Lake Acquisition Corp. filings document a Cayman Islands blank-check issuer and its SPAC-related disclosure record. The company reports material events on Form 8-K, including business-combination agreements and amendments, Rule 425 written communications, shareholder voting matters, risk factors and governance disclosures.
Regulatory filings also describe the company’s Nasdaq-listed security structure, including units, Class A ordinary shares and rights entitling holders to receive a fraction of a Class A ordinary share. The filings identify the company as an emerging growth company and provide capital-structure and public-company status information for a pre-combination issuer.
Mountain Lake Acquisition Corp. (MLAC) received an amended Schedule 13G from a group of institutional investors led by Magnetar Financial LLC, Magnetar Capital Partners LP, Supernova Management LLC, and David J. Snyderman reporting that, as of June 30, 2026, they no longer beneficially own any common shares.
The filing states that the Magnetar-managed funds collectively hold 0 shares of MLAC common stock, representing approximately 0% of the class, with no sole or shared voting or dispositive power. The reporting group also confirms it now owns 5% or less of this class of securities.
Polar Asset Management Partners Inc. filed an amended ownership report regarding Mountain Lake Acquisition Corp. Class A ordinary shares. The firm now reports 0 shares beneficially owned, representing 0% of the class, with no sole or shared voting or dispositive power over any shares.
Tenor Capital Management Company, L.P., Tenor Opportunity Master Fund, Ltd., and Robin Shah filed an amended Schedule 13G reporting that they no longer beneficially own any Class A ordinary shares of Mountain Lake Acquisition Corp. They report 0 shares held, representing 0.0% of the class, with no sole or shared voting or dispositive power. Each reporting person confirms ownership of 5 percent or less of this class of securities.
Mizuho Financial Group, Inc., as a parent holding company, reports that it beneficially owns 0 common shares of Mountain Lake Acquisition Corp. as of June 30, 2026, representing 0.0% of the class. The filing notes that Mizuho Financial Group, Mizuho Bank, Ltd. and Mizuho Americas LLC may be deemed indirect beneficial owners of equity securities directly held by Mizuho Securities USA LLC, their wholly owned subsidiary. All reported voting and dispositive powers are 0 shares, confirming ownership of 5% or less of the class.
W. R. Berkley Corporation and its subsidiary Berkley Insurance Company report that they no longer beneficially own any Class A ordinary shares of Mountain Lake Acquisition Corp. The amendment states 0 shares beneficially owned, representing 0% of the class, with no sole or shared voting or dispositive power.
The filing confirms that W. R. Berkley’s ownership has fallen to 5 percent or less of the class, and therefore it no longer has reportable beneficial ownership in these securities. The amendment is signed by Richard M. Baio in his capacities as Executive Vice President, Chief Financial Officer and Treasurer.
Mountain Lake Acquisition Sponsor LLC, a 10% owner of Mountain Lake Acquisition Corp., reported disposing of all its holdings in connection with consummation of the Business Combination Agreement dated October 1, 2025 (as later amended). On June 11, 2026, the sponsor surrendered its interests to the issuer for cancellation at no cost.
The sponsor returned 495,000 private placement units and 4,355,724 Class B ordinary shares, which were convertible into Class A ordinary shares on a one-for-one basis, to the company for no consideration. Following these cancellations, the sponsor holds zero ordinary shares of the issuer.
Mountain Lake Acquisition Corp. director and CEO Paul Grinberg reported a restructuring of his stake tied to the company’s business combination. On June 11, 2026, he converted 478,010 Class B ordinary shares into 478,010 Class A ordinary shares and then exchanged 478,010 Class A ordinary shares into an equal number of Class A common shares of Avalanche Treasury Corporation (Pubco) in connection with the SPAC Merger under the Business Combination Agreement. Following these transactions, he holds zero Class A and zero Class B ordinary shares of Mountain Lake Acquisition Corp., with his economic interest shifted to Pubco shares.
Mountain Lake Acquisition Corp. director Michael J. Marquez reported merger-related share restructurings and cancellations tied to the company’s business combination. On June 11, 2026, he surrendered 15,888 Class B ordinary shares to the company for no consideration in connection with the Business Combination Agreement and related sponsor support arrangements.
Immediately after that surrender, 9,112 remaining Class B ordinary shares automatically converted one-for-one into 9,112 Class A ordinary shares. In the SPAC Merger step of the transaction, those 9,112 Class A ordinary shares were exchanged into 9,112 shares of Class A common stock of Avalanche Treasury Corporation (Pubco). Following these steps, Marquez held zero Class A and zero Class B ordinary shares of Mountain Lake Acquisition Corp., with his equity exposure moved to Pubco instead.
Mountain Lake Acquisition Corp. director Jeffrey Todd Lager reported several share restructurings tied to the closing of a Business Combination on June 11, 2026. He surrendered 15,888 Class B ordinary shares to the company for no consideration and converted 9,112 Class B shares into 9,112 Class A shares.
Immediately afterward, 9,112 Class A ordinary shares were exchanged into 9,112 shares of Class A common stock of Avalanche Treasury Corporation (Pubco) in the SPAC Merger. Following these steps, Lager holds zero Class A and Class B ordinary shares of Mountain Lake Acquisition Corp. and instead holds Class A common stock of Pubco.