STOCK TITAN

Deep Isolation grants director 70,000 RSUs

DBHL director Leslie Goldman Tepper received 70,000 immediately vested RSUs with share delivery deferred until specific future events.

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Deep Isolation Nuclear, Inc. (DBHL) reported that director Leslie Goldman Tepper received a grant of 70,000 restricted stock units (RSUs) on September 16, 2026 under the Deep Isolation Nuclear, Inc. 2025 Equity Incentive Plan. Each RSU represents one share of common stock; the RSUs vested immediately, but conversion into common shares is deferred until the earliest of a change of control of the company, the director’s separation of service, or the director’s death. Following this grant, the director holds 178,250 shares of common stock directly and 25,000 shares indirectly through Bella AJT Holdings, LLC, over which the director shares voting and investment power and has a pecuniary interest. No Rule 10b5-1 trading plan is reported for these transactions.

Positive

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Negative

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Insider Goldman Tepper Leslie
Role Director
Type Security Shares Price Value
Grant/Award Common Stock F1 70,000 $0.00 $0.00
holding Common Stock F2 -- -- --
Holdings After Transaction: Common Stock — 178,250 shares (Direct); Common Stock — 25,000 shares (Indirect, By Bella AJT Holdings, LLC)
Footnotes (2)
  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.
  2. F2. The Reporting Person is a member of Bella AJT Holdings, LLC and shares voting and investment power over and a pecuniary interest in the securities held by such entity.
RSUs granted 70,000 units Restricted stock units granted on September 16, 2026
Direct common shares after transaction 178,250 shares Direct holdings of Leslie Goldman Tepper following the RSU grant
Indirect common shares 25,000 shares Held through Bella AJT Holdings, LLC with shared voting and investment power
RSU grant date September 16, 2026 Date of the RSU award under the 2025 Equity Incentive Plan
RSU vesting Immediate RSUs vested upon issuance but share delivery is deferred
RSU conversion triggers 3 events Change of control, separation of service, or death of the director
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 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.
separation of service financial
"(ii) a separation of service as a director by the Reporting Person"
pecuniary interest financial
"shares voting and investment power over and a pecuniary interest in the securities"

FAQ

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

What insider equity award did DBHL grant to director Leslie Goldman Tepper?

DBHL granted director Leslie Goldman Tepper 70,000 RSUs on September 16, 2026 under the 2025 Equity Incentive Plan. Each RSU equals one common share, vested immediately, with share delivery deferred until a change of control, separation of service, or death.

How many DBHL shares does Leslie Goldman Tepper hold after this Form 4?

After the reported grant, Leslie Goldman Tepper holds 178,250 DBHL common shares directly and 25,000 shares indirectly through Bella AJT Holdings, LLC, where the director shares voting and investment power and has a pecuniary interest.

When will the 70,000 DBHL RSUs convert into common stock?

The 70,000 DBHL RSUs will convert into common stock at the earliest of a change of control of Deep Isolation Nuclear, Inc., separation of service as a director by Leslie Goldman Tepper, or the director’s death.

Were the DBHL RSU transactions under a Rule 10b5-1 trading plan?

No. The filing indicates the Rule 10b5-1 checkbox is not marked, so no Rule 10b5-1 trading plan is reported in connection with these RSU awards and holdings.

What is the exercise or purchase price of the 70,000 DBHL RSUs?

The RSU grant reports a per-unit price of $0.00. RSUs are a form of equity compensation that typically do not require the holder to pay an exercise or purchase price when they convert into common shares.

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

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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED 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*
Goldman Tepper Leslie

(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)
XDirector10% 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)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock(1)09/16/2026A70,000A$0178,250D
Common Stock(2)25,000IBy Bella AJT Holdings, LLC
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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.
2. The Reporting Person is a member of Bella AJT Holdings, LLC and shares voting and investment power over and a pecuniary interest in the securities held by such entity.
/s/ Leslie Goldman Tepper09/18/2026
** Signature of Reporting PersonDate
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)

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