Lightbridge (LTBR) EVP has 8,104 shares withheld for taxes on RSU vesting

Q: Were any Lightbridge (LTBR) shares sold in the market in this insider report?

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

Q: What stock options does the Lightbridge (LTBR) executive hold according to this report?

The executive holds an employee stock option to purchase 11,351 shares of common stock at an exercise price of $18.48 per share, expiring on 11/09/2026 .

Q: What is the reporting person’s role at Lightbridge (LTBR)?

The reporting person is an officer of Lightbridge, serving as EVP, Nuclear Operations .

Q: Who signed the insider ownership report for Lightbridge (LTBR)?

The report was signed by /s/ Andrey Mushakov on 12/16/2025 .

Filing Impact

(Moderate)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Lightbridge Corporation reported an insider equity transaction by its EVP, Nuclear Operations, on 12/15/2025. The executive had 8,104 shares of common stock withheld at $14.49 per share to cover taxes upon the vesting of restricted stock awards, and no shares were sold into the market.

After this tax withholding, the officer beneficially owns 419,371 shares of Lightbridge common stock directly. The insider also holds a fully vested employee stock option to purchase 11,351 shares at an exercise price of $18.48 per share, expiring on 11/09/2026.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider MUSHAKOV ANDREY

Role EVP, Nuclear Operations

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	8,104	$14.49	$117K
holding	Employee Stock Option (right to buy)	--	--	--

Holdings After Transaction: Common Stock — 419,371 shares (Direct); Employee Stock Option (right to buy) — 11,351 shares (Direct)

Footnotes (1)

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

Form 4 Insider Transactions: What Each Field Means →

12/16/2025 - 05:44 PM

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

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)
12/15/2025

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	12/15/2025		F		8,104⁽¹⁾	D	$14.49	419,371	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
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	12/16/2025
	** 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.

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did Lightbridge (LTBR) report on December 15, 2025?

The filing shows that Lightbridge’s EVP, Nuclear Operations, had 8,104 shares of common stock withheld at $14.49 per share to cover taxes when restricted stock awards vested.

How many Lightbridge (LTBR) shares does the executive own after this transaction?

Following the tax withholding, the reporting officer beneficially owns 419,371 shares of Lightbridge common stock in direct ownership.

Were any Lightbridge (LTBR) shares sold in the market in this insider report?

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

What stock options does the Lightbridge (LTBR) executive hold according to this report?

The executive holds an employee stock option to purchase 11,351 shares of common stock at an exercise price of $18.48 per share, expiring on 11/09/2026.

Is the reported employee stock option currently vested for the Lightbridge (LTBR) executive?

Yes. The explanation notes that this employee stock option is fully vested as of the date of the report.

What is the reporting person’s role at Lightbridge (LTBR)?

The reporting person is an officer of Lightbridge, serving as EVP, Nuclear Operations.

Who signed the insider ownership report for Lightbridge (LTBR)?

The report was signed by /s/ Andrey Mushakov on 12/16/2025.