Avalanche Treasury Company, LLC - 8-K

Item 1.01 Entry into a Material Definitive Agreement.

Master Lender Agreement, Loan Term Sheet

On March 20, 2026, Avalanche Treasury Company, LLC (“AVAT”)
signed a Master Lender Agreement (the “Master Lender Agreement”) with FalconX Charlie, Inc. (the “Lender”) to
facilitate the potential future execution of collateralized Loans in which the Lender may lend to AVAT certain Digital Currency or cash
(dependent on the loaned asset specified in the relevant executed loan term sheet) and AVAT would pay a Loan Fee as well as pledge Collateral
on or prior to the date of any drawdown pursuant to such future loan term sheet, as applicable. The Loans under the Master Lender Agreement
may be Open Loans without a Maturity Date, whereby AVAT may repay and Lender may recall the Loan at any time, or Term Loans with a predetermined
Maturity Date.

On May 29, 2026, AVAT and the Lender executed a loan term sheet, pursuant
to which AVAT agreed to borrow from the Lender, and the Lender agreed to lend to AVAT, a Loan of $25 million pursuant to an Open Loan
(the “May 2026 Collateralized Open Loan”). The Loan Fee is 7% per annum.

At closing of the business combination
between, among others, AVAT and Mountain Lake Acquisition Corp. (the “Business Combination”), AVAT will pledge
approximately 5.6 million AVAX pursuant to the May 2026 Collateralized Open Loan, which is based on an Initial Collateral Ratio of
200%. The Collateral will be held in a segregated custody account with Anchorage Digital Bank N.A. (“Anchorage”)
pursuant to an Account Control Agreement among Anchorage, AVAT and the Lender.

The Margin Call Limit is 180%, whereby if the Collateral Ratio drops
below such Margin Call Limit, the Lender has the right to require AVAT by way of a Margin Call to provide the Lender with additional Collateral
to cause the Collateral Ratio to equal the Initial Collateral Ratio. The Default Limit is 160%, whereby if the Collateral Ratio drops
below such Default Limit, the Lender has the option to declare an Event of Default. The Refund Limit is 230%, whereby if the Collateral
Ratio increases above such Refund Limit for a continuous period of thirty (30) days, AVAT has the right to require the Lender to return
an amount of Collateral such that the Collateral Ratio is equal to the Initial Collateral Ratio.

Staking of the Collateral is subject to the following limitations:
(i) no more than 75% of the Collateral may be staked at any given time and (ii) all staked Collateral must be structured using a laddered
epoch strategy ensuring that a minimum of 50% of the aggregate staked position matures and reverts to an unstaked, fully liquid status
on a rolling seven-day (weekly) cycle.

The Loaned Assets may be drawn by AVAT after closing of the Business
Combination once the Collateral is received by the Lender. AVAT intends to use the May 2026 Collateralized Open Loan to finance certain
closing costs in connection with the Business Combination.

All capitalized terms used in this Current Report on Form 8-K but not
otherwise defined have the meaning ascribed to such terms in the exhibits set forth herein as Exhibits 10.1 and 10.2. The foregoing descriptions
of the Master Lender Agreement and May 2026 Collateralized Open Loan are qualified in their entirety by reference to the full text of
the agreements, which are attached hereto as Exhibits 10.1 and 10.2, respectively, and incorporated herein by reference.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation
under an Off-Balance Sheet Arrangement of a Registrant.

The information set forth above in item 1.01 is incorporated by reference
into this Item 2.03.

Item 8.01 Other Events.

On May 29, 2026, Avalanche Treasury Corporation and Avalanche Treasury
Company, LLC made available their financial results for the three months ended March 31, 2026, which are filed herewith as Exhibits 99.1
and 99.2 hereto, respectively.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit

No.

Description

10.1

Master Lender Agreement, dated March 20, 2026, by and between Avalanche Treasury Company, LLC and FalconX Charlie, Inc.

10.2

Loan Term Sheet, dated May 29, 2026, between Avalanche Treasury Company, LLC and FalconX Charlie, Inc.

99.1

Unaudited condensed financial statements of the Avalanche Treasury Corporation as of and for the three months ended March 31, 2026.

99.2

Unaudited condensed financial statements of Avalanche Treasury Company, LLC as of and for the three months ended March 31, 2026.