MLAC · Mountain Lake Acquisition Corp. · Insider Trading

In connection with the SPAC Merger (as defined in the Business Combination Agreement), an aggregate of 478,010 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.

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.

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.

In connection with the SPAC Merger (as defined in the Business Combination Agreement), an aggregate of 478,010 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.

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.

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, 478,010 Class B ordinary shares were converted into an aggregate of 478,010 Class A ordinary shares (the "Class B Conversion"). Following the Class B Conversion, the Reporting Person owns zero Class B ordinary shares.

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.

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.

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.

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.

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.

On June 11, 2026, in connection with the consummation of the transactions contemplated by the Business Combination Agreement dated as of 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 ("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 4,355,724 Class B ordinary shares and 495,000 private placement units held by Mountain Lake Acquisition Sponsor LLC (the "Sponsor") were surrendered for cancellation by the Sponsor to the Issuer for no consideration. Following the surrender, the Sponsor owns zero ordinary shares.

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.

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, 478,010 Class B ordinary shares were converted into an aggregate of 478,010 Class A ordinary shares (the "Class B Conversion"). Following the Class B Conversion, the Reporting Person owns zero Class B ordinary shares.

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.

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, 478,010 Class B ordinary shares were converted into an aggregate of 478,010 Class A ordinary shares (the "Class B Conversion"). Following the Class B Conversion, the Reporting Person owns zero Class B ordinary shares.

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.

In connection with the SPAC Merger (as defined in the Business Combination Agreement), an aggregate of 478,010 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.

On June 11, 2026, in connection with the consummation of the transactions contemplated by the Business Combination Agreement dated as of 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 ("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 4,355,724 Class B ordinary shares and 495,000 private placement units held by Mountain Lake Acquisition Sponsor LLC (the "Sponsor") were surrendered for cancellation by the Sponsor to the Issuer for no consideration. Following the surrender, the Sponsor owns zero ordinary shares.

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 shares of Class B Ordinary Shares will automatically convert into shares of 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 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.

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.

Represents Class B ordinary shares of the Issuer received in a pro rata distribution of assets by Mountain Lake Acquisition Sponsor LLC (the "Sponsor") to its constituent members (the "Sponsor Distribution"). No consideration was paid in connection with the transaction reported herein.

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.

Represents Class B ordinary shares of the Issuer received in a pro rata distribution of assets by Mountain Lake Acquisition Sponsor LLC (the "Sponsor") to its constituent members (the "Sponsor Distribution"). No consideration was paid in connection with the transaction reported herein.

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.

Represents Class B ordinary shares of the Issuer received in a pro rata distribution of assets by Mountain Lake Acquisition Sponsor LLC (the "Sponsor") to its constituent members (the "Sponsor Distribution"). No consideration was paid in connection with the transaction reported herein.

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.

Following the transactions reported herein, Mountain Lake Acquisition Sponsor LLC (the "Sponsor") is the record holder of 4,355,724 Class B Ordinary Shares of the Issuer (the "Founder Shares"). Each of Paul Grinberg, Douglas Horlick and Jaime W. Vieser are members of the Sponsor. Messrs. Grinberg and Horlick are managing members of the Sponsor and hold voting and investment discretion with respect to the Founder Shares. As such, Mr. Grinberg, Mr. Horlick and Mr. Vieser may be deemed to have beneficial ownership of the Founder Shares held of record by the Sponsor. Mr. Grinberg, Mr. Horlick and Mr. Vieser disclaim any beneficial ownership except to the extent of their pecuniary interest therein.

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 shares of Class B Ordinary Shares will automatically convert into shares of 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.

Represents pro rata distribution of an aggregate of 2,781,776 Class B Ordinary Shares by the Sponsor to its constituent members (the "Sponsor Distribution"). No consideration was paid in connection with the transaction reported herein..

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the forfeiture of shares because the Issuer's over-allotment option was only partially exercised by the underwriters.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the forfeiture of shares because the Issuer's over-allotment option was only partially exercised by the underwriters.

Reflects the Class B ordinary shares owned by the Sponsor in which the reporting person has a pecuniary interest.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the forfeiture of shares because the Issuer's over-allotment option was only partially exercised by the underwriters.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

Reflects the private units owned by Mountain Lake Acquisition Sponsor LLC, the Issuer's sponsor (the "Sponsor"), in which the reporting person has a pecuniary interest. The private units consist of Class A ordinary shares and rights.

The private units were purchased at $10.00 per unit.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

Reflects the private units owned by Mountain Lake Acquisition Sponsor LLC, the Issuer's sponsor (the "Sponsor"), in which the reporting person has a pecuniary interest. The private units consist of Class A ordinary shares and rights.

The private units were purchased at $10.00 per unit.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

Reflects private units owned by Mountain Lake Acquisition Sponsor LLC, the Issuer's sponsor (the "Sponsor"), in which the reporting person has a pecuniary interest. The private units consist of Class A ordinary shares and rights.

The private units were purchased at $10.00 per unit.

The private units were purchased at $10.00 per unit.

Reflects private units owned by Mountain Lake Acquisition Sponsor LLC, the Issuer's sponsor (the "Sponsor"), in which the reporting person has a pecuniary interest. The private units consist of Class A ordinary shares and rights.

The rights convert automatically into Class A ordinary shares at the completion of the Issuer's initial business combination.

The private units were purchased at $10.00 per unit.

Reflects the private units owned by Mountain Lake Acquisition Sponsor LLC, the Issuer's sponsor (the "Sponsor"), in which the reporting person has a pecuniary interest. The private units consist of Class A ordinary shares and rights.

The rights convert automatically into Class A ordinary shares at the completion of the Issuer's initial business combination.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the forfeiture of shares because the Issuer's over-allotment option was only partially exercised by the underwriters.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

The rights convert automatically into Class A ordinary shares at the completion of the Issuer's initial business combination.

Reflects the 495,000 private units owned by Mountain Lake Acquisition Sponsor LLC, the sponsor (the "Sponsor") of Mountain Lake Acquisition Corp. (the "Issuer"). The private units consist of Class A ordinary shares and rights. The private units were purchased at $10.00 per unit for an aggregate purchase price of $4,950,000.

Reflects the 495,000 private units owned by Mountain Lake Acquisition Sponsor LLC, the sponsor (the "Sponsor") of Mountain Lake Acquisition Corp. (the "Issuer"). The private units consist of Class A ordinary shares and rights. The private units were purchased at $10.00 per unit for an aggregate purchase price of $4,950,000.

The private units were purchased at $10.00 per unit.

Reflects the private units owned by Mountain Lake Acquisition Sponsor LLC, the Issuer's sponsor (the "Sponsor"), in which the reporting person has a pecuniary interest. The private units consist of Class A ordinary shares and rights.

The rights convert automatically into Class A ordinary shares at the completion of the Issuer's initial business combination.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the issuance of bonus shares on December 12, 2024 in connection with the upsize of the Issuer's initial public offering.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the issuance of bonus shares on December 12, 2024 in connection with the upsize of the Issuer's initial public offering.

There are two managing member of the Sponsor, Paul Grinberg and Paul Grinberg. Messrs. Grinberg and Horlick hold voting and investment discretion with respect to the Class B ordinary shares held of record by the Sponsor. As such, Messrs. Grinberg and Horlick may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Mr. Horlick disclaims any beneficial ownership except to the extent of his pecuniary interest therein.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the issuance of bonus shares on December 12, 2024 in connection with the upsize of the Issuer's initial public offering.

Reflects the Class B ordinary shares owned by the Sponsor in which the reporting person has a pecuniary interest.

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 shares of Class B ordinary shares will automatically convert into shares of 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.

Reflects the issuance of bonus shares on December 12, 2024 in connection with the upsize of the Issuer's initial public offering.