# EDGAR Filing Document

**Accession Number:** 0002081850
**File Stem:** 0001213900-25-078087
**Filing Date:** 2025-8
**Character Count:** 8950
**Document Hash:** 00ad30a4598abfc0bedd72faa89f7d90
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-25-078087.hdr.sgml**: 20250818

**ACCESSION NUMBER**: 0001213900-25-078087

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250818

**DATE AS OF CHANGE**: 20250818

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Deep Isolation Nuclear, Inc.
- **CENTRAL INDEX KEY:** 0001918080
- **STANDARD INDUSTRIAL CLASSIFICATION:** BLANK CHECKS [6770]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 874225965
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-93942
- **FILM NUMBER:** 251229382

**BUSINESS ADDRESS:**
- **STREET 1:** 2001 ADDISON STREET
- **STREET 2:** SUITE 300
- **CITY:** BERKELEY
- **STATE:** CA
- **ZIP:** 94704
- **BUSINESS PHONE:** 561 464 2841

**MAIL ADDRESS:**
- **STREET 1:** 1761 GEORGE WASHINGTON WAY
- **STREET 2:** #362
- **CITY:** RICHLAND
- **STATE:** WA
- **ZIP:** 99354

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Aspen-1 Acquisition Inc.
- **DATE OF NAME CHANGE:** 20220317
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Muller Elizabeth
- **CENTRAL INDEX KEY:** 0002081850

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**MAIL ADDRESS:**
- **STREET 1:** 2001 ADDISON STREET
- **STREET 2:** SUITE 300
- **CITY:** BERKELEY
- **STATE:** CA
- **ZIP:** 94704

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**DEEP ISOLATION NUCLEAR, INC.**

*(Name of Issuer)*

**Common Stock, $0.0001 par value**

*(Title of Class of Securities)*

**000000000**

*(CUSIP Number)*

**Jeff Dodd**<br>600 Travis Street,<br>Suite 4200<br>Houston TX 77002<br>(713) 220-4736

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**07/23/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **000000000** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**Elizabeth Muller** | Name of reporting person<br>**Elizabeth Muller** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**X1** | Citizenship or place of organization<br>**X1** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**12663479.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**12663479.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**12663479.00** | Aggregate amount beneficially owned by each reporting person<br>**12663479.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**22.1%** | Percent of class represented by amount in Row (11)<br>**22.1%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**IN** | Type of Reporting Person (See Instructions)<br>**IN** | |

---

**Comment for Reporting Person:** 1 Consists of (i) 11,704,270 shares of Common Stock held directly by the Reporting Person and (ii) 959,209 shares of Common Stock underlying options which are exercisable within 60 days of July 23, 2025.

2 Based on 57,372,749 shares of Common Stock issued and outstanding as of July 23, 2025.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, $0.0001 par value

**(b) Name of Issuer:**
DEEP ISOLATION NUCLEAR, INC.

**(c) Address of Issuer's Principal Executive Offices:**
2001 Addison Street, Suite 300, Berkeley, CA, 94704

**Item 4. Purpose of Transaction**

The Reporting Person acquired the Common Stock in connection with the Transactions. The information contained in Item 3 of this Schedule 13D is incorporated herein by reference.

The Reporting Person serves as a Director and part-time Executive Advisor of the Issuer. Accordingly, the Reporting Person may have influence over the corporate activities of the Issuer, including activities that may relate to items described in clauses (a) through (j) of Item 4 of this Schedule 13D. Subject to the Registration Rights Agreement described in Item 6 of this Schedule 13D, the Reporting Person may, from time to time, purchase or sell securities of the Issuer as appropriate for her personal circumstances. Except as described in this Schedule 13D, the Reporting Person does not have any present plans or proposals that relate to or would result in any of the actions described in clauses (a) through (j) of Item 4 of this Schedule 13D. The Reporting Person reserves the right to formulate plans and/or proposals and to take such actions with respect to her investment in the Issuer, including any or all of the actions set forth in clauses (a) through (j) of Item 4 of this Schedule 13D.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The aggregate percentage of Common Stock that the Reporting Person may be deemed to beneficially own is determined in accordance with the rules of the SEC and is based on 57,372,749 shares of Common Stock issued and outstanding as of July 23, 2025, as reported in the Issuer's Current Report on Form 8-K filed with the SEC on July 28, 2025 (the "Super 8-K"). Based on the foregoing, the Reporting Person may be deemed to beneficially own 22.1% of the Issuer's Common Stock in the aggregate, rounded to the nearest tenth. As of the Closing Date, the Reporting Person beneficially owned, in the aggregate, 12,663,479 shares of Common Stock, comprised of (i) 11,704,270 shares of Common Stock held directly by the Reporting Person and (ii) 959,209 shares of Common Stock underlying options which are exercisable within 60 days of July 23, 2025.

**(b)**
As a result of the Transactions, the Reporting Person is the beneficial owner of, and has the sole power to vote or direct the vote and to dispose or to direct the disposition of12,663,479 shares of Common Stock, which includes 959,209 shares of Common Stock underlying options which are exercisable within 60 days of July 23, 2025.

**(c)**
Except as set forth in this Schedule 13D, there have been no other reportable transactions with respect to the Common Stock within the last 60 days by the Reporting Person.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Registration Rights Agreement

In connection with the Merger and the Offering, on July 23, 2025, the Issuer entered into a registration rights agreement (the "Registration Rights Agreement"), pursuant to which, the Issuer has agreed that promptly, but no later than 45 calendar days after the date on which the Super 8-K is first filed by the Issuer with the SEC, the Issuer will file, subject to customary exceptions, a registration statement with the SEC, covering, among other securities, the shares of the Common Stock issued in the Offering and the shares of Common Stock issued to Deep Isolation's stockholders as a result of the Merger and the related share conversion.

Subscription Agreement

Concurrently with the closing of the Merger, the Issuer sold 11,012,387 shares of Common Stock pursuant to the Subscription Agreement at a purchase price of $3.00 per share. The aggregate gross proceeds from the Offering were approximately $33.0 million.

The foregoing summaries of the Merger Agreement, the Registration Rights Agreement and the Subscription Agreement are qualified by the actual terms of the Merger Agreement, the Registration Rights Agreement and the Subscription Agreement, copies of which are attached as exhibits to this Schedule 13D and are incorporated herein by reference.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** Elizabeth Muller

**Signature:** /s/ Elizabeth Muller

**Name/Title:** Elizabeth Muller

**Date:** 08/18/2025