Lightbridge (LTBR) CEO has 13,256 shares withheld for tax obligations

Rhea-AI Filing Summary

Lightbridge Corp President and CEO Seth Grae reported a tax-related share disposition tied to equity compensation. On April 3, 2026, 13,256 shares of Common Stock were withheld at $11.0900 per share to cover taxes upon the vesting of performance-based restricted stock awards. The footnotes state that no shares were sold in the market. After this withholding, Grae directly owned 778,014 Common shares and held fully vested employee stock options covering 7,937 shares at $12.6000 per share expiring on October 26, 2027, and 18,199 shares at $18.4800 per share expiring on November 9, 2026.

Insights

Equity compensation analyst

Routine tax withholding on vested awards; no open-market sale.

The filing shows 13,256 Common shares withheld at $11.0900 per share to satisfy tax obligations when performance-based restricted stock vested. Footnotes explicitly clarify that no shares were sold, making this a mechanical tax-withholding event rather than a discretionary market trade.

After the withholding, Seth Grae still holds 778,014 Common shares directly plus vested options on 7,937 shares at $12.6000 expiring on October 26, 2027 and 18,199 shares at $18.4800 expiring on November 9, 2026. This indicates a substantial remaining equity stake, so the overall signal is neutral and compensation-related.

Insider Trade Summary

3 transactions reported

Mixed 3 txns

Insider GRAE SETH

Role President and CEO

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	13,256	$11.09	$147K
holding	Employee Stock Option (right to buy)	--	--	--
holding	Employee Stock Option (right to buy)	--	--	--

Holdings After Transaction: Common Stock — 778,014 shares (Direct); Employee Stock Option (right to buy) — 7,937 shares (Direct)

Footnotes (1)

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

Tax-withheld shares: 13,256 shares Withholding price: $11.0900 per share Common shares held: 778,014 shares +3 more

6 metrics

Tax-withheld shares 13,256 shares Common Stock withheld on April 3, 2026 to cover taxes

Withholding price $11.0900 per share Price used for 13,256 withheld Common shares

Common shares held 778,014 shares Direct Common Stock holdings after transaction

Option at $12.6000 7,937 underlying shares Fully vested employee stock option expiring October 26, 2027

Option at $18.4800 18,199 underlying shares Fully vested employee stock option expiring November 9, 2026

Tax-withholding count 1 transaction Tax withholding disposition events in summary

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 financial

"underlying_security_title": "Common Stock""

Form 4 Insider Transactions: What Each Field Means →

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^*

GRAE SETH

(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)

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

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	04/03/2026		F		13,256(1)	D	$11.09	778,014	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)	$12.6							(2)	10/26/2027	Common Stock	7,937		7,937	D
Employee Stock Option (right to buy)	$18.48							(2)	11/09/2026	Common Stock	18,199		18,199	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/ Seth Grae	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)

FAQ

What insider transaction did Lightbridge (LTBR) CEO Seth Grae report?

Seth Grae reported withholding 13,256 Lightbridge Common shares at $11.0900 per share. The shares were used to cover taxes on vested performance-based restricted stock awards, and footnotes state there was no open-market sale involved.

Did the Lightbridge (LTBR) CEO sell shares in the market in this Form 4?

No, the Form 4 states the 13,256 shares were withheld to cover taxes on vested performance-based restricted stock awards. A footnote explicitly clarifies that no shares were sold in the open market as part of this transaction.

How many Lightbridge (LTBR) shares does Seth Grae hold after this transaction?

After the tax-withholding transaction, Seth Grae directly holds 778,014 shares of Lightbridge Common Stock. This figure reflects his position following the 13,256-share withholding to satisfy tax obligations on vested performance-based restricted stock awards.

What stock options does the Lightbridge (LTBR) CEO retain after the filing?

Seth Grae retains fully vested employee stock options on 7,937 shares at $12.6000 per share expiring October 26, 2027, and 18,199 shares at $18.4800 per share expiring November 9, 2026. These options are in addition to his direct Common Stock holdings.

Is the Form 4 transaction for Lightbridge (LTBR) considered a buy or a sale?

The primary transaction is a tax-withholding disposition coded as “F,” not a market sale or purchase. Shares were delivered to cover tax liabilities on vested performance-based restricted stock awards, with footnotes confirming no open-market sale occurred.

Does this Lightbridge (LTBR) Form 4 indicate a change in CEO confidence?

The Form 4 reflects routine tax withholding rather than a discretionary trade, so it carries limited signaling value. Seth Grae continues to hold 778,014 Common shares plus vested options, suggesting his overall equity exposure to Lightbridge remains substantial.