X0609 4 2026-06-11 1 0002029492 Mountain Lake Acquisition Corp. MLAC 0001844909 Horlick Douglas false C/O MOUNTAIN LAKE ACQUISITION CORP. 930 TAHOE BLVD STE 802 PMB 45 INCLINE VILLAGE NV 89451 1 1 0 0 CFO and President 0 Class A ordinary shares, par value $0.0001 per share 2026-06-11 4 D 0 478010 D 0 D Class B ordinary shares, par value $0.0001 per share 2026-06-11 4 M 0 478010 D Class A ordinary shares 478010 0 D 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 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, 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. /s/ Douglas Horlick 2026-06-15