X0609 4 2026-01-21 0 0001918080 Deep Isolation Nuclear, Inc. NONE 0002088585 Hunter Ralph L. JR false C/O DEEP ISOLATION NUCLEAR, INC. 2001 ADDISON STREET, SUITE 300 BERKELEY CA 94704 1 0 0 0 0 Common Stock 2026-01-21 4 A 0 43333 0 A 43333 D Represents the grant of restricted stock units ("RSUs"). Each RSU represents a contingent right to receive one share of the Issuer's common stock upon settlement. The RSUs shall fully vest in 1 year and are subject to a deferral based on the earliest to occur of a change of control, a separation of service as a director, and death. /s/ Ralph L. Hunter JR. 2026-04-28