[Form 4] INTERNATIONAL ISOTOPES INC Insider Trading Activity

Rhea-AI Filing Summary

International Isotopes Inc. (INIS) reported an insider transaction on a Form 4. A reporting person who is both a Director and 10% Owner was granted a stock option to purchase 500,000 shares of common stock at an exercise price of $0.06 per share on 10/10/2025 (transaction code A).

The option becomes exercisable on 07/11/2026 and expires on 10/10/2035. Following the transaction, the insider beneficially owned 500,000 derivative securities, held directly.

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
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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^*

GROSSO CHRISTOPHER G

(Last) (First) (Middle)

4137 COMMERCE CIRCLE

(Street)

IDAHO FALLS ID 83401

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INTERNATIONAL ISOTOPES INC [ INIS ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/10/2025

4. 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 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

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
Stock Option (Right to Buy)	$0.06	10/10/2025		A		500,000		07/11/2026	10/10/2035	Common Stock	500,000	$0	500,000	D

Explanation of Responses:

	/s/ Shahe Bagerdjian, Attorney-in-fact	10/15/2025
	** 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.

FAQ

What did INIS disclose in this Form 4?

A Director and 10% Owner received a grant of 500,000 stock options at a $0.06 exercise price on 10/10/2025.

How many INIS shares are covered by the option grant?

The option covers 500,000 shares of common stock.

What is the exercise price and timing for the INIS options?

The exercise price is $0.06 per share; the options become exercisable on 07/11/2026 and expire on 10/10/2035.

How many derivative securities does the insider own after the transaction?

Following the grant, the insider beneficially owned 500,000 derivative securities.

What is the insider’s relationship to INIS?

The reporting person is a Director and a 10% Owner of International Isotopes Inc.

Is the ownership direct or indirect?

The filing indicates the options are held directly.