Deep Isolation Nuclear grants Parker 62,500 stock units

Both awards vest over multiple years and are subject to continued service through each applicable vesting date.

Rhea-AI Filing Summary

Deep Isolation Nuclear, Inc. CCO Christopher Lombard Parker received 62,500 restricted stock units on October 6, 2026, bringing his directly held common shares to 79,167. The RSUs vest in four annual installments of 15,625 from September 29, 2027 through September 29, 2030, subject to continued service. He also received non-qualified stock options covering 100,344 common shares at a $3.50 exercise price, expiring September 29, 2036. Parker reported 581,338 common shares held indirectly through CS Transform Limited and shares voting and investment power over those shares.

Insider Trade Summary

Grant/Award: 162,844 shares

Grant/Award 3 txns

Insider Parker Christopher Lombard

Role CCO

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy) F2	100,344	$0.00	$0.00
Grant/Award	Common Stock F1	62,500	$0.00	$0.00
holding	Common Stock F3	--	--	--

Holdings After Transaction: Stock Option (right to buy) — 100,344 contracts (Direct); Common Stock — 79,167 shares (Direct); Common Stock — 581,338 shares (Indirect, By CS Transform Limited)

Footnotes (3)

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 as follows: 15,625 RSUs on each of September 29, 2027, September 29, 2028, September 29, 2029 and September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.
2. F2. Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 25,086 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.
3. F3. The Reporting Person is a director and shareholder of CS Transform Limited and shares voting and investment power over the shares of common stock held thereby.

Key Figures

Restricted stock units granted: 62,500 RSUs Direct common shares after grant: 79,167 shares Non-qualified stock options granted: 100,344 options +4 more

7 metrics

Restricted stock units granted 62,500 RSUs Grant on October 6, 2026

Direct common shares after grant 79,167 shares Reported after the October 6, 2026 RSU grant

Non-qualified stock options granted 100,344 options Grant on October 6, 2026

Exercise price $3.50 per share Non-qualified stock options

Indirect common shares 581,338 shares Held through CS Transform Limited

RSU annual installment 15,625 RSUs Each annual installment from September 29, 2027 through September 29, 2030

Option expiration September 29, 2036 Non-qualified stock options

Key Terms

restricted stock units ("RSUs"), non-qualified stock option, vesting date

3 terms

restricted stock units ("RSUs") financial

"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.

non-qualified stock option financial

"grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan"

A non-qualified stock option (NSO) is a contract that lets an employee or service provider buy company shares at a fixed price for a set period, like a voucher to purchase stock later at today’s price. It matters to investors because exercising NSOs creates ordinary income for the holder and can increase share count, affecting a company’s earnings and ownership mix; think of it as a future sale that can dilute existing shareholders and has immediate tax consequences for the recipient.

vesting date financial

"continued service through each vesting date"

FAQ

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

How do Christopher Lombard Parker's DBHL stock options vest?

Parker's 100,344 non-qualified stock options vest for 25,086 option shares on September 29, 2027, with the remaining option shares vesting in 36 monthly installments thereafter through September 29, 2030. Each vesting date is subject to his continued service.

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

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Available on EDGAR 10/08/2026 - 08:32 PM EDT Accepted by SEC EDGAR 10/08/2026 - 08:32 PM EDT 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^*

Parker Christopher Lombard

(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)

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

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock(1)	10/06/2026		A		62,500	A	$0	79,167	D
Common Stock								581,338	I	By CS Transform Limited(3)

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
Stock Option (right to buy)(2)	$3.5	10/06/2026		A		100,344		(2)	09/29/2036	Common Stock	100,344	$0	100,344	D

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 as follows: 15,625 RSUs on each of September 29, 2027, September 29, 2028, September 29, 2029 and September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

2. Represents a grant of non-qualified stock option pursuant to the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. The option shall vest as follows: 25,086 option shares on September 29, 2027 and the remaining option shares in 36 monthly installments thereafter through September 29, 2030, in each case subject to the Reporting Person's continued service through each vesting date.

3. The Reporting Person is a director and shareholder of CS Transform Limited and shares voting and investment power over the shares of common stock held thereby.

	/s/ Christopher Parker	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)