Standard Nuclear, Inc. (STDN) awards director 16,667 RSUs vesting over 3 years

Rhea-AI Filing Summary

Matina Alexander C reported acquisition or exercise transactions in this Form 4 filing.

Standard Nuclear, Inc. director Matina Alexander reported an award of 16,667 shares of Class A common stock underlying restricted stock units on 2026-07-17, at a reported price of 0.0000 per share. The RSUs vest in quarterly 1/12th installments over three years, contingent on continued service, with 16,667 shares reported as directly held after the award.

Insider Trade Summary

Net Buyer: 16,667 shares

Net Buy 1 txn

Insider Matina Alexander C

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A common stock F1	16,667	$0.00	$0.00

Holdings After Transaction: Class A common stock — 16,667 shares (Direct)

Footnotes (1)

1. F1. Represents shares of Class A Common Stock underlying an award of restricted stock units ("RSUs"). The RSUs will vest in quarterly installments of 1/12th over three years, subject to the Reporting Person's continued service through each vesting date.

Key Figures

RSU grant size: 16667.0000 shares Grant price: 0.0000 per share Post-transaction holdings: 16667.0000 shares +2 more

5 metrics

RSU grant size 16667.0000 shares Class A common stock underlying RSUs awarded on 2026-07-17

Grant price 0.0000 per share Reported transaction price per share for the RSU-related shares

Post-transaction holdings 16667.0000 shares Total Class A common stock reported as directly held after the award

Vesting period 3 years RSUs vest over three years in quarterly installments

Vesting rate 1/12th per quarter RSUs vest in quarterly installments of 1/12th of the award

Key Terms

restricted stock units, Class A common stock, vesting

3 terms

restricted stock units financial

"underlying an award of restricted stock units ("RSUs"). The RSUs will vest"

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.

Class A common stock financial

"Represents shares of Class A Common Stock underlying an award"

Class A common stock is a category of a company’s shares that carries a specific set of ownership rights—most commonly defined voting power and claims on dividends—set out in the company’s charter. For investors it matters because the class determines how much influence you have over corporate decisions, the share’s likely dividend and trading behavior, and how it compares in value to other share classes, like choosing a particular seat with different privileges at the company’s decision-making table.

vesting financial

"The RSUs will vest in quarterly installments of 1/12th over three years"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/17/2026 - 09:13 PM Accepted by SEC EDGAR 07/17/2026 - 09:12 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^*

Matina Alexander C

(Last) (First) (Middle)

C/O STANDARD NUCLEAR, INC.

200 EUROPIA AVE

(Street)

OAK RIDGE TENNESSEE 37830

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Standard Nuclear, Inc. [ STDN ]

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)
07/17/2026

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
Class A common stock	07/17/2026		A		16,667(1)	A	$0	16,667	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 shares of Class A Common Stock underlying an award of restricted stock units ("RSUs"). The RSUs will vest in quarterly installments of 1/12th over three years, subject to the Reporting Person's continued service through each vesting date.

Remarks:

	/s/ Shahram Ghasemian, by power of attorney	07/17/2026
	** 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)