X0609 4 2026-09-08 0002092446 Avalanche Treasury Corp AVAT 0001298598 Gambale Virginia false AVALANCHE TREASURY COMPANY, LLC 11 W. 42ND STREET, 2ND FLOOR NEW YORK NY 10036 true false false false false Stock Option (Right to Buy) 0.85 2026-09-08 4 A false 66512 0 A 2036-09-08 Class A common stock 66512 66512 D Stock Option (Right to Buy) 0.85 2026-09-08 4 A false 10751 0 A 2036-09-08 Class A common stock 10751 77263 D Represents the initial award of stock options for his service as director. The initial option awards vest in three equal installments during each of the first three 12-month periods following the Grant Date on the earlier to occur during each such 12-month period of (i) the anniversary of the Grant Date and (ii) the annual meeting of the Company's stockholders, subject to the director's continued service with the Company or an affiliate through the vesting date. Represents the annual award of stock options for his service as director. The annual option awards vest in full on the earlier to occur of (i) the first anniversary of the Grant Date and (ii) the first annual meeting of the Company's stockholders to occur following the Grant Date, subject to the director's continued service with the Company or an affiliate through the vesting date. /s/ Laine Mihalchick Moljo, as Attorney-in-Fact 2026-09-10