Standard Nuclear (STDN) director adds 2,000 omitted shares

Rhea-AI Filing Summary

Standard Nuclear, Inc. (STDN) director Cohen Seth Michael filed an amended Form 3 to correct his initial statement of beneficial ownership. The amendment reports that he beneficially owned 2,000 shares of Class A common stock as of the original Form 3 date, which had inadvertently excluded these shares.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Cohen Seth Michael

Role Director

Type	Security	Shares	Price	Value
holding	Class A common stock	--	--	--

Holdings After Transaction: Class A common stock — 2,000 shares (Direct)

Key Figures

Beneficially owned shares: 2,000 shares of Class A common stock

1 metrics

Beneficially owned shares 2,000 shares of Class A common stock Total shares beneficially owned by Cohen Seth Michael as of the original Form 3 date

Key Terms

Form 3, Form 3/A, beneficially owned, Class A common stock

4 terms

Form 3 regulatory

"amend the Reporting Person's original Form 3 to correct the amount"

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

Form 3/A regulatory

"This Form 3/A is being filed to amend the Reporting Person's"

An amended Form 3 (Form 3/A) is a corrected or updated disclosure filed with regulators that revises an insider’s initial report of their ownership in a public company — typically for officers, directors or large shareholders. Investors use it like a corrected inventory list: it clarifies who owns how many shares and whether earlier reports had errors, helping assess insider confidence, possible conflicts and the accuracy of ownership records that can affect stock valuation and trust.

beneficially owned financial

"excluded 2,000 shares of Class A Common Stock that were 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.

Class A common stock financial

"2,000 shares of Class A Common Stock that were beneficially owned"

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.

FAQ

What does Standard Nuclear, Inc. (STDN) report in this Form 3/A amendment?

The amendment states that director Cohen Seth Michael beneficially owned 2,000 shares of Class A common stock as of the original Form 3 date, correcting an omission in the original filing that had excluded these shares.

How many STDN shares does Cohen Seth Michael report owning in this Form 3/A?

He reports beneficial ownership of 2,000 shares of Class A common stock, held directly, as of the date of the original Form 3, correcting the previously understated amount.

Is there a new buy or sell transaction reported for STDN in this Form 3/A?

No. The filing reports a holding entry only and corrects the number of shares beneficially owned as of the original Form 3 date; it does not report any new purchase or sale transaction.

What error is being corrected for STDN in this amended Form 3?

The company reports that the original Form 3 for Cohen Seth Michael inadvertently excluded 2,000 shares of Class A common stock that were beneficially owned by him as of that date. This amendment adds those shares.

Is the 2,000-share position in STDN reported as direct or indirect ownership?

The 2,000 shares of Class A common stock are reported as direct ownership, as indicated by the ownership code “D” in the holding entry.

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

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Available on EDGAR 08/28/2026 - 06:49 PM Accepted by SEC EDGAR 08/28/2026 - 06:49 PM Learn about SEC filing dates

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:			3235-0104
Estimated average burden
hours per response:			0.5

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. Date of Event Requiring Statement (Month/Day/Year)
08/12/2026

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

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)
08/14/2026

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

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

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Class A common stock	2,000	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

This Form 3/A is being filed to amend the Reporting Person's original Form 3 to correct the amount of shares beneficially owned by the Reporting Person as of the date of the original Form 3. The original Form 3 inadvertently excluded 2,000 shares of Class A Common Stock that were beneficially owned by the Reporting Person as of such date.

	/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 5 (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 3: SEC 1473 (03-26)