Deep Isolation Nuclear grants director 15,476 stock units

Q: When do Renee J. Hornbaker's DBHL RSUs vest and convert?

The RSUs vest on September 29, 2027, subject to Renee J. Hornbaker's continued service through each vesting date. Conversion into common shares is deferred until the earliest of a change of control, her separation from service as a director, or her death.

The RSUs vest subject to continued service, with conversion into common shares deferred until a change of control, director separation, or death.

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Rhea-AI Filing Summary

Deep Isolation Nuclear, Inc. (DBHL) director Renee J. Hornbaker received a grant of 15,476 restricted stock units on October 6, 2026, under the company's 2025 Equity Incentive Plan. Each RSU represents a contingent right to receive one common share. The units vest on September 29, 2027, subject to continued service through each vesting date; conversion into shares is deferred until the earliest of a change of control, her separation from service as a director, or her death. Her reported direct position following the transaction was 128,809 shares.

Insider Trade Summary

Grant/Award: 15,476 shares

Grant/Award 1 txn

Insider HORNBAKER RENEE J

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock ^F1	15,476	$0.00	$0.00

Holdings After Transaction: Common Stock — 128,809 shares (Direct)

Footnotes (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 vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting 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: 15,476 restricted stock units Common shares per RSU: 1 common share Vesting date: September 29, 2027 +1 more

4 metrics

RSUs granted 15,476 restricted stock units October 6, 2026

Common shares per RSU 1 common share Each RSU represents a contingent right to receive one share upon vesting

Vesting date September 29, 2027 Subject to continued service through each vesting date

Direct shares following transaction 128,809 shares Reported position following the transaction

Key Terms

restricted stock units, contingent right, change of control

3 terms

restricted stock units financial

"grant of restricted stock units ("RSUs")"

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.

contingent right technical

"Each RSU represents a contingent right to receive one share"

change of control financial

"a change of control of the Issuer"

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.

FAQ

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

How many RSUs did DBHL director Renee J. Hornbaker receive?

Renee J. Hornbaker, a director of Deep Isolation Nuclear, Inc. (DBHL), received 15,476 restricted stock units on October 6, 2026, under the 2025 Equity Incentive Plan; each RSU represents a contingent right to receive one common share.

When do Renee J. Hornbaker's DBHL RSUs vest and convert?

The RSUs vest on September 29, 2027, subject to Renee J. Hornbaker's continued service through each vesting date. Conversion into common shares is deferred until the earliest of a change of control, her separation from service as a director, or her death.

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

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Available on EDGAR 10/08/2026 - 08:28 PM EDT Accepted by SEC EDGAR 10/08/2026 - 08:28 PM EDT

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^*

HORNBAKER RENEE J

(Last)

(First)

(Middle)

C/O DEEP ISOLATION NUCLEAR, INC.

5717 LEGACY DRIVE, STE 250, OFFICE 2079

(Street)

PLANO

TEXAS

75024

(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)
10/06/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock⁽¹⁾	10/06/2026		A		15,476	A	$0	128,809	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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 vesting. The RSUs shall vest on September 29, 2027, subject to the Reporting Person's continued service through each vesting date. Conversion of the RSUs into shares of common stock of the Issuer upon vesting 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/ Renee Hornbaker	10/08/2026
	** 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)

Source: View Original Filing on SEC EDGAR