Warren E. Spieker JR - Jul 23, 2025 Form 3 Insider Report for Deep Isolation Nuclear, Inc.

Role: 10%+ Owner
Signature: /s/ Warren E. Spieker, Jr.
Transactions as of: Jul 23, 2025
Transactions value $: $0
Form type: 3
Date filed: 8/12/2025, 09:38 PM
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Spieker Warren Edward JR	10%+ Owner	707 MENLO AVE. #100, MENLO PARK	/s/ Warren E. Spieker, Jr.	2025-08-12	0002080807

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding		Common Stock						1.29M	Jul 23, 2025	Direct	F1
holding		Common Stock						4.61M	Jul 23, 2025	Self, as Trustee of the Spieker Living Trust UAD 3/12/02	F2

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

Explanation of Responses:

Id	Content
F1	Received in connection with the Issuer's merger (the "Merger") with Deep Isolation, Inc. ("Deep Isolation") in accordance with the terms of the Agreement and Plan of Merger and Reorganization dated as of July 23, 2025, by and among the Issuer (f/k/a Aspen-1 Acquisition Inc.), Deep Isolation Acquisition Corp. and Deep Isolation (the "Merger Agreement"), in exchange for 50,000 shares of Deep Isolation common stock held directly by the Reporting Person immediately prior to the effective time of the Merger. Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each issued and outstanding share of Deep Isolation capital stock was converted into the right to receive 25.837283 shares of the Issuer's common stock, rounded to the nearest whole share. The Merger closed on July 23, 2025.
F2	Received in connection with the Issuer's Merger with Deep Isolation in accordance with the terms of the Merger Agreement, in exchange for 178,485 shares of Deep Isolation common stock indirectly beneficially owned by the Reporting Person immediately prior to the effective time of the Merger. Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each issued and outstanding share of Deep Isolation capital stock was converted into the right to receive 25.837283 shares of the Issuer's common stock, rounded to the nearest whole share. The Merger closed on July 23, 2025.

Content

Received in connection with the Issuer's merger (the "Merger") with Deep Isolation, Inc. ("Deep Isolation") in accordance with the terms of the Agreement and Plan of Merger and Reorganization dated as of July 23, 2025, by and among the Issuer (f/k/a Aspen-1 Acquisition Inc.), Deep Isolation Acquisition Corp. and Deep Isolation (the "Merger Agreement"), in exchange for 50,000 shares of Deep Isolation common stock held directly by the Reporting Person immediately prior to the effective time of the Merger. Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each issued and outstanding share of Deep Isolation capital stock was converted into the right to receive 25.837283 shares of the Issuer's common stock, rounded to the nearest whole share. The Merger closed on July 23, 2025.

Received in connection with the Issuer's Merger with Deep Isolation in accordance with the terms of the Merger Agreement, in exchange for 178,485 shares of Deep Isolation common stock indirectly beneficially owned by the Reporting Person immediately prior to the effective time of the Merger. Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each issued and outstanding share of Deep Isolation capital stock was converted into the right to receive 25.837283 shares of the Issuer's common stock, rounded to the nearest whole share. The Merger closed on July 23, 2025.