Deep Isolation Nuclear grants Steele 70,000 RSUs

Deep Isolation Nuclear director Christa Steele received 70,000 RSUs that vest immediately but convert into shares only upon specified future events.

Rhea-AI Filing Summary

Deep Isolation Nuclear, Inc. (symbol: DBHL) is the issuer of record for a Form 4 filing submitted to the SEC. Steele Christa reported acquisition or exercise transactions in this Form 4 filing.

Deep Isolation Nuclear, Inc. (DBHL) reported that director Christa Steele received a grant of 70,000 restricted stock units (RSUs) on September 16, 2026 under the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The RSUs vested immediately, and Steele now holds 113,333 shares of common stock, with RSU settlement deferred until certain future events.

Insider Trade Summary

Grant/Award: 70,000 shares

Grant/Award 1 txn

Insider Steele Christa

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 shares Price per RSU: $0.00 per share Shares owned after transaction: 113,333 shares +1 more

4 metrics

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

Price per RSU $0.00 per share Compensation award, not a market purchase

Shares owned after transaction 113,333 shares Total DBHL common stock beneficially owned by Christa Steele after the RSU grant

Transaction date September 16, 2026 Date of RSU grant to Christa Steele

Key Terms

restricted stock units ("RSUs"), change of control, separation of service, Equity Incentive Plan

4 terms

restricted stock units ("RSUs") financial

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

Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.

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"

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.

FAQ

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

What insider transaction did DBHL report for director Christa Steele?

DBHL reported that director Christa Steele received a grant of 70,000 RSUs of common stock on September 16, 2026 as a compensation award under the company’s 2025 Equity Incentive Plan.

How many DBHL shares does Christa Steele hold after this RSU grant?

After the RSU grant, Christa Steele is reported to beneficially own 113,333 shares of DBHL common stock, including the RSUs that have vested but are not yet settled into shares.

Do the DBHL RSUs granted to Christa Steele vest immediately?

Yes. The filing states that upon issuance the 70,000 RSUs immediately vested, meaning the service-based conditions are satisfied, though conversion into common stock is deferred until specified events occur.

When will Christa Steele’s DBHL RSUs convert into common stock?

Each RSU will convert into one DBHL common share upon the earliest of: (i) a change of control of the company, (ii) separation of service as a director, or (iii) the death of Christa Steele.

Was the DBHL RSU grant to Christa Steele made under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not checked, and there is no footnote indicating that the 70,000 RSU award was made pursuant to a Rule 10b5-1 trading plan.

What price per share is associated with Christa Steele’s DBHL RSU grant?

The RSU grant reports a $0.00 price per share, consistent with a compensation award rather than an open-market purchase, so no cash outlay is indicated for this acquisition.

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

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Available on EDGAR 09/18/2026 - 09:25 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^*

Steele Christa

(Last) (First) (Middle)

P.O. BOX 195115

(Street)

SAN JUAN PUERTO RICO 00919-5115

(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/ Christa Steele	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)