SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Spieker Warren Edward JR (Last) (First) (Middle) 707 MENLO AVE. #100 (Street) MENLO PARK CA 94025 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 07/23/2025	3. Issuer Name and Ticker or Trading Symbol Deep Isolation Nuclear, Inc. [ NONE ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	1,291,864(1)	D
Common Stock	4,611,567(2)	I	Self, as Trustee of the Spieker Living Trust UAD 3/12/02

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. 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.

	/s/ Warren E. Spieker, Jr.	08/12/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
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