Lightbridge EVP reports tax withholding of 11,936 LTBR shares

Lightbridge Corporation executive vice president of nuclear operations Andrey Mushakov reported a tax-related share withholding.

Rhea-AI Filing Summary

Lightbridge Corporation executive vice president of nuclear operations Andrey Mushakov reported a tax-related share withholding. On December 4, 2025, 11,936 shares of Lightbridge common stock were withheld at $17.79 per share to cover taxes upon vesting of restricted stock awards, and he beneficially owns 427,475 shares directly after this transaction. The filing notes that no shares were sold. He also holds fully vested employee stock options exercisable at $18.48 for 11,351 shares of common stock, expiring on November 9, 2026.

Insider Trade Summary

Exercise Price or Tax Liability: 11,936 shares

Exercise Price or Tax Liability 2 txns

Insider MUSHAKOV ANDREY

Role EVP, Nuclear Operations

Type	Security	Shares	Price	Value
Exercise Price or Tax Liability	Common Stock	11,936	$17.79	$212K
holding	Employee Stock Option (right to buy)	--	--	--

Holdings After Transaction: Common Stock — 427,475 shares (Direct); Employee Stock Option (right to buy) — 11,351 contracts (Direct)

Footnotes (2)

1. F1. Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.
2. F2. This option is fully vested as of the date of this report.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Lightbridge (LTBR) executive Andrey Mushakov report?

Andrey Mushakov reported that 11,936 shares of Lightbridge common stock were withheld on December 4, 2025 at $17.79 per share to cover taxes when restricted stock awards vested.

How many Lightbridge (LTBR) shares does Andrey Mushakov own after the transaction?

After the tax withholding transaction, Andrey Mushakov beneficially owns 427,475 shares of Lightbridge common stock directly.

Were any Lightbridge (LTBR) shares actually sold in this filing?

No. The explanation states that the 11,936 shares were withheld to cover taxes upon vesting of restricted stock awards and that no shares were sold.

At what price were the withheld Lightbridge (LTBR) shares valued?

The 11,936 shares of Lightbridge common stock withheld for taxes were valued at $17.79 per share.

What stock options does Andrey Mushakov hold in Lightbridge (LTBR)?

He holds fully vested employee stock options with an exercise price of $18.48 for 11,351 shares of Lightbridge common stock, expiring on November 9, 2026.

What is Andrey Mushakov’s role at Lightbridge (LTBR)?

Andrey Mushakov is an officer of Lightbridge, serving as EVP, Nuclear Operations, and he filed the report as a single reporting person.

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

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Accepted by SEC EDGAR 12/05/2025 - 04:30 PM EST Learn about SEC filing dates

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
Estimated average burden
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^*

MUSHAKOV ANDREY

(Last) (First) (Middle)

C/O LIGHTBRIDGE CORPORATION

11710 PLAZA AMERICA DRIVE, SUITE 2000

(Street)

RESTON VA 20190

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
LIGHTBRIDGE Corp [ LTBR ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Nuclear Operations

3. Date of Earliest Transaction (Month/Day/Year)
12/04/2025

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
Common Stock	12/04/2025		F		11,936(1)	D	$17.79	427,475	D

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
Employee Stock Option (right to buy)	$18.48							(2)	11/09/2026	Common Stock	11,351		11,351	D

Explanation of Responses:

1. Shares withheld to cover taxes upon vesting of restricted stock awards. No shares were sold.

2. This option is fully vested as of the date of this report.

	/s/ Andrey Mushakov	12/05/2025
	** 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.