Thomas Edward Hendrix - 17 Jul 2026 Form 4 Insider Report for Standard Nuclear, Inc. (STDN)

Reporting relationship: Chairman of the Board, Director
Issuer ticker: STDN
Reported as of: 17 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Jul 2026, 20:59:43 UTC
Prior SEC filing: 15 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Shahram Ghasemian, by power of attorney

Key filing fact

Thomas Edward Hendrix filed Form 4 for Standard Nuclear, Inc. (STDN) on 17 Jul 2026.

Key facts

This page summarizes Thomas Edward Hendrix's Form 4 filing for Standard Nuclear, Inc. (STDN).
5 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 17 Jul 2026, 20:59.

Change

Previous filing in this sequence was filed on 15 Jul 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002143173 Primary reporting owner

Hendrix Thomas Edward

Relationship: Chairman of the Board, Director
Address: C/O STANDARD NUCLEAR, INC., 200 EUROPIA AVE, OAK RIDGE
Signature: /s/ Shahram Ghasemian, by power of attorney
Signature date: 17 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

STDN transaction

Class A common stock

Award

Transaction value
Shares: +2,734,687
Change %
Price: $0.000000^*
Shares after: 2,734,687
Date: 17 Jul 2026
Ownership: Direct
Footnotes: F1

STDN transaction

Class A common stock

Conversion of derivative security

Transaction value
Shares: +50,000
Change %: +0.87%
Price: $0.000000^*
Shares after: 5,804,000
Date: 17 Jul 2026
Ownership: Held by Standard Nuclear Trust
Footnotes: F2, F3

STDN transaction

Class A common stock

Conversion of derivative security

Transaction value
Shares: +20,308
Change %: +0.35%
Price: $0.000000^*
Shares after: 5,824,308
Date: 17 Jul 2026
Ownership: Held by Standard Nuclear Trust
Footnotes: F2, F3

STDN transaction

Class A common stock

Other

Transaction value
Shares: -5,824,308
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 17 Jul 2026
Ownership: Held by Standard Nuclear Trust
Footnotes: F2, F4

STDN holding

Class A common stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,754,000
Date: 17 Jul 2026
Ownership: Held by Standard Nuclear Trust
Footnotes: F2

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

STDN transaction Derivative

Class B Common Stock

Other

Transaction value
Shares: +5,824,308
Change %
Price
Shares after: 5,824,308
Date: 17 Jul 2026
Ownership: Held by Standard Nuclear Trust
Underlying class: Class A common stock
Underlying amount: 5,824,308
Exercise price
Footnotes: F2, F4, F5

STDN holding Derivative

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 5,754,000
Date: 17 Jul 2026
Ownership: Direct
Underlying class: Class A common stock
Underlying amount: 5,754,000
Exercise price
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Represents shares of Class A Common Stock underlying an award of restricted stock units ("RSUs"). The RSUs will vest over three years in quarterly installments of 1/12th, subject to the Reporting Person's continued service through each vesting date. Each share of Class A Common Stock received upon the settlement of the RSU may be exchanged by the Reporting Person into one share of the Issuer's Class B Common Stock.

Footnote F2

Andrew Price is the trustee of the trust and may be replaced at the discretion of the Reporting Person. Pursuant to a voting agreement entered into with the trust, the Reporting Person has sole voting and dispositive control over such securities. By virtue of his relationship with the trust, the Reporting Person is deemed to have an indirect beneficial interest in the shares held by the trust.

Footnote F3

In connection with the completion of the Issuer's initial public offering of its Class A Common Stock (the "IPO"), each share of Series Seed Preferred, Series Seed-1 Preferred, Series A Preferred, and Series A-2 Preferred was automatically converted into shares of Class A Common Stock at a ratio of 1-for-1.

Footnote F4

Pursuant to an Exchange Agreement entered into between the Issuer and the trust, all 5,824,308 shares of Class A Common Stock held by the trust after giving effect to the Preferred Conversion were exchanged for an equivalent number of newly issued shares of Class B Common Stock on a one-for-one basis upon the effectiveness of the Issuer's Sixth Amended and Restated Certificate of Incorporation which was filed in connection with the completion of the IPO.

Footnote F5

Each outstanding share of Class B Common Stock is convertible into one share of the Issuer's Class A common stock at any time, (i) at the option of the Reporting Person, (ii) automatically upon any transfer, whether or not for value (except for certain permitted transfers), or (iii) upon the occurrence of certain events or conditions, as described further in the Issuer's Sixth Amended and Restated Certificate of Incorporation.

SEC remarks

The Reporting Person serves as Executive Chairman and Director, Chairman of the Board.