X0609 4 2026-09-28 0 0002092446 Avalanche Treasury Corp AVAT 0002122752 Smith Gerald Bartholomew false AVALANCHE TREASURY COMPANY, LLC. 11 W. 42ND STREET, 2ND FLOOR NEW YORK NY 10036 1 1 0 0 Chief Executive Officer 0 Class A Common Stock 2026-09-28 4 A 0 750000 0 A 750001 D Class A Common Stock 2026-09-30 4 F 0 35956 1.90 D 714045 D Represents a grant of restricted stock units ("RSUs") on September 28, 2026. The RSUs will vest 1/6 on each of the first six six-month anniversaries of October 1, 2025. Each RSU represents a contingent right to receive one share of Class A common stock. Represents shares of Class A Common Stock withheld by the Issuer to satisfy tax withholding upon the vesting of RSUs. /s/ Laine Mihalchick Moljo, as Attorney-in-Fact 2026-09-30