Director Sweta Chakraborty sells 1,143 LIGHTBRIDGE (LTBR) shares under 10b5-1 plan

Rhea-AI Filing Summary

LIGHTBRIDGE Corp director Sweta Chakraborty sold 1,143 shares of common stock in an open-market transaction at a weighted average price of $9.29 per share. The sale was executed under a Rule 10b5-1 trading plan adopted on March 5, 2026. After this transaction, she directly holds 47,849 shares, indicating that only a small portion of her ownership was sold. The shares were sold in multiple trades at prices ranging from $9.24 to $9.31.

Insights

Equity analyst

Director executes small, pre-planned sale under Rule 10b5-1 plan.

Director Sweta Chakraborty sold 1,143 shares of LIGHTBRIDGE Corp common stock in an open-market transaction at a weighted average price of $9.29 per share. The transaction was coded as a sale and classified as non-derivative common stock.

The filing notes this sale was effected pursuant to a Rule 10b5-1 trading plan adopted on March 5, 2026, indicating it was pre-planned rather than opportunistic. Following the sale, she continues to hold 47,849 shares directly, so the transaction represents a small fraction of her position.

The price range for the multiple trades was $9.24 to $9.31 per share, suggesting execution within a narrow band. Future company filings may provide additional context if there are further scheduled sales under the same plan.

Insider Trade Summary 10b5-1

Net Seller: 1,143 shares ($10,618)

Net Sell 1 txn

Insider Chakraborty Sweta

Role null

Sold 1,143 shs ($11K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,143	$9.29	$11K

Holdings After Transaction: Common Stock — 47,849 shares (Direct, null)

Footnotes (1)

1. The reported sale of 1,143 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.24 to $9.31, inclusive. The reporting person undertakes to provide to Lightbridge Corporation, any security holder of Lightbridge Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

Key Figures

Shares sold: 1,143 shares Average sale price: $9.29 per share Price range: $9.24–$9.31 per share +2 more

5 metrics

Shares sold 1,143 shares Open-market sale of common stock

Average sale price $9.29 per share Weighted average price for 1,143 shares sold

Price range $9.24–$9.31 per share Range of prices for multiple sale transactions

Shares held after sale 47,849 shares Common stock directly owned post-transaction

Net shares sold 1,143 shares Net sell direction in transaction summary

Key Terms

Rule 10b5-1 trading plan, weighted average price, open-market sale, Form 4

4 terms

Rule 10b5-1 trading plan regulatory

"The reported sale ... was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person..."

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.

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/02/2026 - 04:06 PM Accepted by SEC EDGAR 07/02/2026 - 04:05 PM 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)
07/01/2026

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	07/01/2026		S		1,143(1)	D	$9.29(2)	47,849	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 1,143 shares of common stock was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on March 5, 2026.

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $9.24 to $9.31, inclusive. The reporting person undertakes to provide to Lightbridge Corporation, any security holder of Lightbridge Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

	/s/ Larry Goldman, Attorney-in-Fact for Sweta Chakraborty	07/02/2026
	** 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)

FAQ

What insider transaction did LIGHTBRIDGE Corp (LTBR) report for Sweta Chakraborty?

LIGHTBRIDGE Corp reported that director Sweta Chakraborty sold 1,143 shares of common stock. The open-market sale was executed at a weighted average price of $9.29 per share and carried the standard Form 4 transaction code “S” for a sale.

At what price did Sweta Chakraborty sell LIGHTBRIDGE (LTBR) shares?

Sweta Chakraborty sold 1,143 LIGHTBRIDGE common shares at a weighted average price of $9.29. According to the filing, the trades occurred in multiple transactions with individual prices ranging from $9.24 to $9.31 per share, all executed on the same transaction date.

How many LIGHTBRIDGE (LTBR) shares does Sweta Chakraborty hold after this Form 4 sale?

After selling 1,143 shares, Sweta Chakraborty directly holds 47,849 LIGHTBRIDGE common shares. This post-transaction balance shown in the Form 4 indicates the sale was relatively small compared with her remaining ownership position in the company’s stock.

Was Sweta Chakraborty’s LIGHTBRIDGE (LTBR) stock sale part of a Rule 10b5-1 plan?

Yes. The Form 4 states the 1,143-share sale was effected pursuant to a Rule 10b5-1 trading plan adopted on March 5, 2026. Such plans pre-schedule trades, signaling this transaction was planned in advance rather than a discretionary market-timing decision.

What does the Form 4 reveal about pricing details for the LIGHTBRIDGE (LTBR) insider sale?

The Form 4 reports a weighted average sale price of $9.29 per share. It adds that the 1,143 shares were sold in multiple transactions at prices ranging from $9.24 to $9.31, and the reporting person will provide detailed breakdowns upon request.