Leslie Goldman - Oct 1, 2025 Form 4 Insider Report for Deep Isolation Nuclear, Inc.

Role: Director
Signature: /s/ Leslie Goldman Tepper
Transactions as of: Oct 1, 2025
Transactions value $: $0
Form type: 4
Date filed: 10/3/2025, 04:00 PM
Previous filing: Aug 5, 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Goldman Tepper Leslie	Director	C/O DEEP ISOLATION NUCLEAR, INC., 2001 ADDISON STREET, SUITE 300, BERKELEY	/s/ Leslie Goldman Tepper	2025-10-03	0002062355

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction		Common Stock	Award	$0	+32.5K	+49.86%	$0.00	97.7K	Oct 1, 2025	Direct	F1
holding		Common Stock						25K	Oct 1, 2025	By Bella AJT Holdings, LLC	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction		Stock Option (Right to Buy)	Award	$0	+10.8K		$0.00	10.8K	Oct 1, 2025	Common Shares	10.8K	$3.00	Direct	F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	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 are subject to a 4-year vesting period, whereby 1/48th of the RSUs will vest monthly beginning October 1, 2025, subject to the Reporting Person's continuous service through each vesting date.
F2	The Reporting Person is a member of Bella AJT Holdings, LLC and shares voting and investment power over and a pecuniary interest in the securities held by such entity.
F3	The Stock Option is subject to a 4-year vesting schedule, whereby 1/48th of the option shares will vest monthly beginning on October 1, 2025, subject to Reporting Person's continued service through each vesting date.