LIGHTBRIDGE (LTBR) EVP uses 8,597 shares to cover tax on vesting

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

LIGHTBRIDGE Corp executive reports routine tax withholding on vested stock awards. EVP, Nuclear Operations Andrey Mushakov had 8,597 shares of common stock withheld at $11.09 per share on April 3, 2026 to cover taxes from vesting performance-based restricted stock awards. The footnote states that no shares were sold.

After this transaction, he directly holds 380,485 common shares. He also holds a fully vested employee stock option covering 11,351 shares of common stock at an exercise price of $18.48 per share, expiring on November 9, 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	8,597	$11.09	$95K
holding	Employee Stock Option (right to buy)	--	--	--

Holdings After Transaction: Common Stock — 380,485 shares (Direct); Employee Stock Option (right to buy) — 11,351 shares (Direct)

Footnotes (1)

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

Key Figures

Shares withheld for tax: 8,597 shares at $11.09 Shares held after transaction: 380,485 shares Vested stock option size: 11,351 underlying shares +2 more

5 metrics

Shares withheld for tax 8,597 shares at $11.09 Common stock withheld on April 3, 2026 to cover taxes

Shares held after transaction 380,485 shares Direct common stock holdings following tax withholding

Vested stock option size 11,351 underlying shares Employee stock option on common stock, fully vested

Option exercise price $18.48 per share Exercise price of employee stock option

Option expiration date November 9, 2026 Expiration of employee stock option on common stock

Key Terms

performance-based restricted stock awards, tax-withholding disposition, Employee Stock Option (right to buy), fully vested, +1 more

5 terms

performance-based restricted stock awards financial

"Shares withheld to cover taxes upon the vesting of performance-based restricted stock awards."

tax-withholding disposition financial

"transaction_action: tax-withholding disposition"

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Employee Stock Option (right to buy) financial

"security_title: Employee Stock Option (right to buy)"

fully vested financial

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

underlying security shares financial

"underlying_security_shares: 11351.0000"

Form 4 Insider Transactions: What Each Field Means →

04/14/2026 - 04:00 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

VIRGINIA

20190

(City)

(State)

(Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/03/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	04/03/2026		F		8,597⁽¹⁾	D	$11.09	380,485	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 the vesting of performance-based restricted stock awards. No shares were sold.

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

	/s/ Andrey Mushakov	04/14/2026
	** 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 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.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR

FAQ

What insider transaction did LIGHTBRIDGE (LTBR) report for Andrey Mushakov?

LIGHTBRIDGE reported that EVP, Nuclear Operations Andrey Mushakov had 8,597 common shares withheld to cover taxes on vesting performance-based restricted stock awards. According to the footnote, this was a tax-withholding event and no shares were sold on the open market.

Did the LIGHTBRIDGE (LTBR) executive actually sell shares in this Form 4?

No. The Form 4 footnote explains the 8,597 shares of LIGHTBRIDGE common stock were withheld to cover taxes upon vesting of performance-based restricted stock awards. It explicitly states that no shares were sold, distinguishing this from an open-market sale.

How many LIGHTBRIDGE (LTBR) shares does Andrey Mushakov hold after this transaction?

Following the tax-withholding transaction, Andrey Mushakov directly holds 380,485 shares of LIGHTBRIDGE common stock. This figure reflects his remaining equity position after 8,597 shares were withheld to satisfy tax obligations tied to vested performance-based restricted stock awards.

What stock options for LIGHTBRIDGE (LTBR) does the executive still have outstanding?

The filing shows a fully vested employee stock option for 11,351 underlying LIGHTBRIDGE common shares at an exercise price of $18.48 per share. This option expires on November 9, 2026 and represents an additional potential equity stake beyond his current common shares.

How should investors interpret the tax-withholding code F in this LIGHTBRIDGE (LTBR) Form 4?

Code F represents shares withheld to cover taxes or exercise price, not an open-market sale. Here, 8,597 LIGHTBRIDGE shares were withheld for tax on vested performance-based restricted stock awards, while the executive maintained a substantial remaining share position and vested options.