Kevin J. Harrill - 17 Oct 2026 Form 4 Insider Report for Standard Nuclear, Inc. (STDN)

Reporting relationship: Chief Financial Officer
Issuer ticker: STDN
Reported as of: 17 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 19 Oct 2026, 07:46:16 UTC
Prior SEC filing: 15 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Shahram Ghasemian, Attorney-in-fact for Kevin J. Harrill

Filing notes and source

Key filing fact

Kevin J. Harrill filed Form 4 for Standard Nuclear, Inc. (STDN) on 19 Oct 2026.

Key facts

This page summarizes Kevin J. Harrill's Form 4 filing for Standard Nuclear, Inc. (STDN).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 19 Oct 2026, 07:46.

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 0001920896 Primary reporting owner

HARRILL KEVIN J

Relationship: Chief Financial Officer
Address: C/O STANDARD NUCLEAR, INC., 200 EUROPIA AVE, OAK RIDGE
Signature: /s/ Shahram Ghasemian, Attorney-in-fact for Kevin J. Harrill
Signature date: 19 Oct 2026

Reported non-derivative transactions

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

STDN transaction

Class A common stock

Tax liability

Transaction value
Shares: -32,715
Change %: -2.1%
Price: $12.17^*
Shares after: 1,555,444
Date: 17 Oct 2026
Ownership: Direct
Footnotes: F1

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 1 footnote

Footnote F1

Shares surrendered to the Company to satisfy tax withholding upon vesting of restricted stock units. Price is the closing price of the Class A common stock on the vesting date.

SEC remarks

Exhibit 24 - Power of Attorney. The Reporting Person's Power of Attorney dated July 15, 2026 was previously submitted as a graphic with the Reporting Person's Form 3 filed July 15, 2026 and is filed herewith in text format.