Deep Isolation director granted 70,000 RSUs

DBHL director Jonathon Angell received 70,000 immediately vested RSUs with payout deferred until specific trigger events.

Rhea-AI Filing Summary

Deep Isolation Nuclear, Inc. (DBHL) reported that director Jonathon Angell received a grant of 70,000 restricted stock units (RSUs) of common stock on September 16, 2026 under the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan at a stated price of $0.00 per share. Each RSU represents a contingent right to receive one share of common stock that vested immediately upon issuance, with conversion into common shares deferred until the earliest of a change of control of the company, Angell’s separation of service as a director, or his death. Following this award, Angell directly holds 458,907 shares of common stock, including the RSUs reported.

Insider Trade Summary

Grant/Award: 70,000 shares

Grant/Award 1 txn

Insider Angell Jonathon

Role Director

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

Holdings After Transaction: Common Stock — 458,907 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: 458,907 shares Stated grant price per share: $0.00 per share +2 more

5 metrics

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

Shares following transaction 458,907 shares Director’s direct holdings after the RSU grant

Stated grant price per share $0.00 per share Price field for the 70,000 RSU grant

Trigger events for RSU conversion 3 events Change of control, separation of service as director, or death

Transactions in this Form 4 1 transaction Single RSU grant/award acquisition reported

Key Terms

restricted stock units, 2025 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.

2025 Equity Incentive Plan financial

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

change of control financial

"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 director Jonathon Angell report on this Form 4?

He reported a grant of 70,000 restricted stock units (RSUs) of Deep Isolation Nuclear, Inc. common stock on September 16, 2026, received as a director equity award under the company’s 2025 Equity Incentive Plan at a stated price of $0.00 per share.

How do the 70,000 RSUs granted to the DBHL director vest and convert into shares?

The 70,000 RSUs vested immediately upon issuance, but convert into common shares only upon the earliest of a change of control of the company, the director’s separation of service, or the director’s death, as disclosed in the Form 4 footnote.

What is Jonathon Angell’s total DBHL common stock holding after this RSU grant?

After the grant, Jonathon Angell is reported as directly holding 458,907 shares of Deep Isolation Nuclear, Inc. common stock, which includes the 70,000 RSUs reported in this Form 4 filing.

Was the DBHL director’s RSU grant a cash purchase on the market?

No. The Form 4 describes the transaction as a grant or award of 70,000 RSUs at a stated price of $0.00 per share, made under the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan, not as an open-market cash purchase.

Is the DBHL director’s RSU transaction reported under a Rule 10b5-1 trading plan?

The filing indicates the Rule 10b5-1 checkbox is not affirmed, and the footnote describes the transaction as an equity grant of 70,000 RSUs, with no statement that it was made pursuant to a Rule 10b5-1 trading plan.

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

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Available on EDGAR 09/18/2026 - 09:21 PM Accepted by SEC EDGAR 09/18/2026 - 09:20 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^*

Angell Jonathon

(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	458,907	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/ Jonathon Angell	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)