Lightbridge director sells 717 shares at $7.43

LIGHTBRIDGE Corp director Sweta Chakraborty sold a small block of shares under a pre-arranged Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

LIGHTBRIDGE Corp (LTBR) director Sweta Chakraborty reported selling 717 shares of common stock on September 1, 2026 at $7.43 per share in an open-market or private transaction. Following this sale, she directly holds 57,132 shares, and the trade was effected under a Rule 10b5-1 trading plan adopted on March 5, 2026.

Insider Trade Summary 10b5-1

Net Seller: 717 shares

Net Sell 1 txn

Insider Chakraborty Sweta

Role Director

Sold 717 shs ($5K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	717	$7.43	$5K

Holdings After Transaction: Common Stock — 57,132 shares (Direct)

Footnotes (1)

1. F1. The reported sale of 717 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026.

Key Figures

Shares sold: 717 shares Sale price per share: $7.43 per share Shares owned after transaction: 57,132 shares +1 more

4 metrics

Shares sold 717 shares Common stock sale reported for September 1, 2026

Sale price per share $7.43 per share Price for the 717 LTBR shares sold on September 1, 2026

Shares owned after transaction 57,132 shares Direct holdings of Sweta Chakraborty following the reported sale

Net shares sold 717 shares Net insider share change across all reported transactions in this filing

Key Terms

Rule 10b5-1 trading plan, Common Stock, open market or private transaction

3 terms

Rule 10b5-1 trading plan regulatory

"was effected pursuant to a Rule 10b5-1 trading plan adopted"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

Common Stock financial

"The reported sale of 717 shares of common stock was effected"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

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

What insider transaction did LTBR director Sweta Chakraborty report?

Sweta Chakraborty reported a sale of 717 shares of LIGHTBRIDGE Corp common stock on September 1, 2026, in an open-market or private transaction at $7.43 per share, under a Rule 10b5-1 trading plan.

How many LIGHTBRIDGE Corp (LTBR) shares did Sweta Chakraborty sell and at what price?

She sold 717 shares of LIGHTBRIDGE Corp common stock at a price of $7.43 per share on September 1, 2026, in an open-market or private transaction.

How many LTBR shares does Sweta Chakraborty own after this transaction?

After the reported sale, Sweta Chakraborty directly owns 57,132 shares of LIGHTBRIDGE Corp common stock, according to the Form 4 disclosure.

Was the LTBR insider sale by Sweta Chakraborty under a Rule 10b5-1 plan?

Yes. The filing states the sale of 717 shares was effected pursuant to a Rule 10b5-1 trading plan adopted by Sweta Chakraborty on March 5, 2026.

What is Sweta Chakraborty’s role at LIGHTBRIDGE Corp (LTBR)?

Sweta Chakraborty is reported as a director of LIGHTBRIDGE Corp in the Form 4 insider transaction filing.

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

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Available on EDGAR 09/02/2026 - 04:02 PM EDT Accepted by SEC EDGAR 09/02/2026 - 04:02 PM EDT 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).

X

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^*

Chakraborty Sweta

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026

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	09/01/2026		S		717(1)	D	$7.43	57,132	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

Explanation of Responses:

1. The reported sale of 717 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026.

	/s/ Larry Goldman, Attorney-in-Fact for Sweta Chakraborty	09/02/2026
	** 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)