Form: 3

Initial statement of beneficial ownership of securities

Documents

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
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1. Name and Address of Reporting Person*
Matina Alexander C
(Last) (First) (Middle)
C/O STANDARD NUCLEAR, INC.
200 EUROPIA AVE
(Street)
OAK RIDGE TN 37830
(City) (State) (Zip)
2. Date of Event Requiring Statement (Month/Day/Year)
07/15/2026 		3. Issuer Name and Ticker or Trading Symbol
Standard Nuclear, Inc. [ STDN ]
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
X Director 10% Owner
Officer (give title below) Other (specify below)
5. If Amendment, Date of Original Filed (Month/Day/Year)
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)
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
Non statutory stock options (1) 06/10/2035 Class A common stock 200,000 0.21 D
Non statutory stock options (2) 04/19/2036 Class A common stock 334,000 1.635 D
Explanation of Responses:
1. Represents stock options to purchase 200,000 shares of Class A Common Stock granted on June 11, 2025 with an exercise price of $0.21 per share, which vests as follows: 25% vested on January 13, 2026, with an additional 1/48th vesting monthly thereafter, subject to the Reporting Person's continued service.
2. Represents stock options to purchase 334,000 shares of Class A Common Stock granted on April 20, 2026 with an exercise price of $1.635 per share, which vests as follows: 25% vests on December 1, 2026, with an additional 1/36th vesting monthly thereafter, subject to the Reporting Person's continued service.
Remarks:
/s/ Alexander Matina 07/15/2026
** 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.