Deep Isolation Nuclear awards director 70,000 RSUs

DBHL director Ralph L. Hunter Jr. received 70,000 immediately vested RSUs with share settlement deferred until a future triggering event.

Rhea-AI Filing Summary

Deep Isolation Nuclear, Inc. (DBHL) reported that director Ralph L. Hunter Jr. received an equity grant of 70,000 restricted stock units (RSUs) on September 16, 2026 under the 2025 Equity Incentive Plan. The RSUs vested immediately but will convert into common shares only upon a future triggering event, bringing his reported direct holdings to 113,333 shares.

Insider Trade Summary

Grant/Award: 70,000 shares

Grant/Award 1 txn

Insider Hunter Ralph L. JR

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	70,000	$0.00	$0.00

Holdings After Transaction: Common Stock — 113,333 shares (Direct)

Footnotes (1)

1. F1. Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock. Upon issuance the RSUs immediately vested, but their conversion into shares of common stock of the Issuer is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

Key Figures

RSUs granted: 70,000 units Shares following transaction: 113,333 shares Grant price per share: $0.00 per share +1 more

4 metrics

RSUs granted 70,000 units Restricted stock units granted to director on September 16, 2026

Shares following transaction 113,333 shares Director’s reported direct holdings after the RSU grant

Grant price per share $0.00 per share Equity award reported with no cash price per share, consistent with RSU grant

Transaction date September 16, 2026 Date of RSU grant to the director

Key Terms

restricted stock units, Equity Incentive Plan, change of control, separation of service

4 terms

restricted stock units financial

"Represents a grant of restricted stock units ("RSUs") to the Reporting Person"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Equity Incentive Plan financial

"pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan"

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

change of control regulatory

"until the earliest of the following events to occur: (i) a change of control"

A change of control occurs when the ownership or management of a company shifts significantly, such as through a sale, merger, or acquisition, resulting in new leadership or ownership structure. This change can impact the company's direction and decision-making, which is important for investors because it may affect the company's stability, strategy, and future prospects.

separation of service financial

"(ii) a separation of service as a director by the Reporting Person"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did DBHL report for Ralph L. Hunter Jr.?

DBHL reported that director Ralph L. Hunter Jr. received a grant of 70,000 RSUs of common stock on September 16, 2026 as an equity award, classified as an acquisition of securities.

How many DBHL shares does the director hold after this RSU grant?

After the reported grant, the director’s direct holdings are listed as 113,333 shares of DBHL common stock, reflecting the equity position reported following the transaction.

What are the key terms of the 70,000 RSUs granted by DBHL?

Each of the 70,000 RSUs represents a contingent right to receive one share of DBHL common stock. The RSUs vested immediately upon issuance, but settlement into shares is deferred until specified future events occur.

When will the DBHL RSUs for the director convert into common shares?

The RSUs will convert into DBHL common shares at the earliest of: (i) a change of control of the company, (ii) the director’s separation from service, or (iii) the director’s death.

Was a Rule 10b5-1 trading plan involved in this DBHL Form 4 transaction?

No. The filing indicates no Rule 10b5-1 plan was affirmed for this equity grant; it is reported as a grant of RSUs under the company’s 2025 Equity Incentive Plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/18/2026 - 09:24 PM Accepted by SEC EDGAR 09/18/2026 - 09:24 PM Learn about SEC filing dates

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Hunter Ralph L. JR

(Last) (First) (Middle)

C/O DEEP ISOLATION NUCLEAR, INC.

2001 ADDISON STREET, SUITE 300

(Street)

BERKELEY CALIFORNIA 94704

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Deep Isolation Nuclear, Inc. [ DBHL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/16/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock(1)	09/16/2026		A		70,000	A	$0	113,333	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents a grant of restricted stock units ("RSUs") to the Reporting Person pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one share of common stock. Upon issuance the RSUs immediately vested, but their conversion into shares of common stock of the Issuer is deferred until the earliest of the following events to occur: (i) a change of control of the Issuer, (ii) a separation of service as a director by the Reporting Person, or (iii) death of the Reporting Person.

	/s/ Ralph L. Hunter Jr.	09/18/2026
	** 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 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)