Standard Nuclear director granted 13,255 RSUs

Standard Nuclear, Inc. (STDN) director Seth Michael Cohen reported an acquisition of 13,255 shares of Class A common stock underlying a restricted stock unit (RSU) award granted at $0.00 per share.

Rhea-AI Filing Summary

Standard Nuclear, Inc. (STDN) director Seth Michael Cohen reported an acquisition of 13,255 shares of Class A common stock underlying a restricted stock unit (RSU) award granted at $0.00 per share. According to the disclosure, 100% of these RSUs will vest on the earlier of the day before Standard Nuclear’s 2027 annual meeting of stockholders or the one-year anniversary of the grant date, subject to his continued board service. This amended Form 4 also corrects Cohen’s beneficial ownership to 15,255 shares, noting that an earlier filing had inadvertently omitted 2,000 already beneficially owned shares.

Insider Trade Summary

Grant/Award: 13,255 shares

Grant/Award 1 txn

Insider Cohen Seth Michael

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Class A common stock F1, F2	13,255	$0.00	$0.00

Holdings After Transaction: Class A common stock — 15,255 shares (Direct)

Footnotes (2)

1. F1. 13,255 represents shares of Class A Common Stock underlying an award of restricted stock units ("RSUs"). 100% of the RSUs will vest on the earlier of (i) the day before the Issuer's 2027 Annual Meeting of Stockholders or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service as a member of the Board of Directors of the Issuer through such vesting date.
2. F2. This Form 4/A is being filed solely to correct the total number of shares of Class A Common Stock beneficially owned by the Reporting Person as of the reporting date. The original Form 4 inadvertently excluded 2,000 shares of Class A Common Stock that were beneficially owned by the Reporting Person as of such date.

Key Figures

RSU shares granted: 13,255 shares of Class A common stock Grant price per share: $0.00 per share Shares beneficially owned after transaction: 15,255 shares of Class A common stock +3 more

6 metrics

RSU shares granted 13,255 shares of Class A common stock Underlying an RSU award granted to director Seth Michael Cohen

Grant price per share $0.00 per share Reported transaction price for the 13,255 RSU underlying shares

Shares beneficially owned after transaction 15,255 shares of Class A common stock Total beneficial ownership reported as of the Form 4/A reporting date

Previously omitted shares 2,000 shares of Class A common stock Shares inadvertently excluded from Cohen’s original Form 4

RSU vesting proportion 100% All 13,255 RSUs vest on the earlier of the day before the 2027 annual meeting or one-year after grant, subject to continued service

Transaction date 2026-08-12 Date of the RSU grant/award transaction

Key Terms

restricted stock units, beneficially owned, vesting, Board of Directors

4 terms

restricted stock units financial

"represents shares of Class A Common Stock underlying an award of restricted stock units"

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.

beneficially owned financial

"correct the total number of shares of Class A Common Stock beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

vesting financial

"100% of the RSUs will vest on the earlier of (i) the day before"

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.

Board of Directors financial

"subject to the Reporting Person's continued service as a member of the Board"

The Board of Directors is a group of people chosen by a company's owners to help make big decisions and oversee how the company is run. They act like a team of advisors or managers, making sure the company stays on track and meets its goals. Their choices can influence the company's success and how it grows.

FAQ

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

What insider transaction did STDN director Seth Michael Cohen report on this Form 4/A?

Seth Michael Cohen reported a grant of 13,255 shares of STDN Class A common stock underlying restricted stock units. The award was reported at $0.00 per share and represents a compensation-related acquisition, not an open-market purchase or sale.

How many STDN shares does Seth Michael Cohen now beneficially own after this amendment?

After the amendment, Seth Michael Cohen is reported to beneficially own 15,255 shares of STDN Class A common stock. The Form 4/A states that a prior filing had inadvertently omitted 2,000 shares that were already beneficially owned as of the reporting date.

What are the vesting terms of the 13,255 RSUs reported by STDN for Seth Michael Cohen?

The 13,255 RSUs will vest 100% on the earlier of (i) the day before Standard Nuclear’s 2027 annual meeting of stockholders or (ii) the one-year anniversary of the grant date, provided Cohen continues to serve on the board through the vesting date.

Was the STDN Form 4/A filed to report a new transaction or to correct prior information?

The Form 4/A was filed to correct prior information. It states that the original Form 4 inadvertently excluded 2,000 shares of Class A common stock that were already beneficially owned by Seth Michael Cohen as of the reporting date.

Is Seth Michael Cohen’s RSU grant under a Rule 10b5-1 trading plan for STDN stock?

No. The filing’s Rule 10b5-1 checkbox is not marked as being pursuant to a plan, and the footnotes describe the transaction as an RSU award with vesting conditions tied to service and the 2027 annual meeting, not as trades under a 10b5-1 plan.

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

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Available on EDGAR 08/28/2026 - 06:51 PM EDT Accepted by SEC EDGAR 08/28/2026 - 06:50 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^*

Cohen Seth Michael

(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)
08/12/2026

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)
08/14/2026

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	08/12/2026		A		13,255(1)	A	$0	15,255(2)	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. 13,255 represents shares of Class A Common Stock underlying an award of restricted stock units ("RSUs"). 100% of the RSUs will vest on the earlier of (i) the day before the Issuer's 2027 Annual Meeting of Stockholders or (ii) the one-year anniversary of the grant date, subject to the Reporting Person's continued service as a member of the Board of Directors of the Issuer through such vesting date.

2. This Form 4/A is being filed solely to correct the total number of shares of Class A Common Stock beneficially owned by the Reporting Person as of the reporting date. The original Form 4 inadvertently excluded 2,000 shares of Class A Common Stock that were beneficially owned by the Reporting Person as of such date.

Remarks:

	/s/ Shahram Ghasemian, by power of attorney	08/28/2026
	** 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)