Lightbridge director sells 15,000 company shares

LIGHTBRIDGE Corp director Mark Robert Tobin reported selling 15,000 shares of common stock on 2026-08-11 in an open-market transaction.

Rhea-AI Filing Summary

LIGHTBRIDGE Corp director Mark Robert Tobin reported selling 15,000 shares of common stock on 2026-08-11 in an open-market transaction. The shares were sold at a weighted average price of $8.99 per share, across multiple trades ranging from $8.925 to $9.05. Following this sale, Tobin directly holds 66,669 shares of LIGHTBRIDGE Corp common stock.

Insider Trade Summary

Net Seller: 15,000 shares

Net Sell 1 txn

Insider Tobin Mark Robert

Role Director

Sold 15,000 shs ($135K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	15,000	$8.99	$135K

Holdings After Transaction: Common Stock — 66,669 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.925 to $9.05, 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: 15,000 shares Weighted average sale price: $8.99 per share Sale price range: $8.925 to $9.05 per share +1 more

4 metrics

Shares sold 15,000 shares Common Stock sold by director on 2026-08-11

Weighted average sale price $8.99 per share Average price across multiple sale transactions

Sale price range $8.925 to $9.05 per share Range of prices for the multiple sale trades

Shares held after sale 66,669 shares Director’s direct holdings following the transaction

Key Terms

weighted average price, open market, non-derivative

3 terms

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 financial

"transaction_code_description: Sale in open market or private transaction"

An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.

non-derivative financial

"transaction_type: non-derivative"

FAQ

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

What insider transaction did LIGHTBRIDGE Corp (LTBR) disclose for Mark Robert Tobin?

LIGHTBRIDGE Corp director Mark Robert Tobin disclosed selling 15,000 shares of common stock on 2026-08-11 in an open-market transaction, at a weighted average price of $8.99 per share across multiple trades.

At what price did the LTBR director sell his 15,000 shares?

The director sold 15,000 shares at a weighted average price of $8.99 per share. A footnote states the multiple trades occurred in a price range from $8.925 to $9.05 per share, inclusive.

How many LIGHTBRIDGE Corp (LTBR) shares does Mark Robert Tobin hold after the sale?

After the reported sale, Mark Robert Tobin directly holds 66,669 shares of LIGHTBRIDGE Corp common stock. This post-transaction holding figure is disclosed in the Form 4 as the total shares following the transaction.

Was the LTBR insider sale made under a Rule 10b5-1 trading plan?

The filing’s Rule 10b5-1 checkbox is not checked, and no footnote states that the transaction was under a trading plan. The sale is therefore reported without an affirmative Rule 10b5-1 plan designation in this document.

What type of security did the LIGHTBRIDGE Corp (LTBR) director sell?

The transaction involves Common Stock of LIGHTBRIDGE Corp. The Form 4 lists a non-derivative transaction in common shares, with 15,000 shares sold and 66,669 shares reported as directly owned afterward.

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

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Accepted by SEC EDGAR 08/12/2026 - 04:32 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).

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^*

Tobin Mark Robert

(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)
08/11/2026

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	08/11/2026		S		15,000	D	$8.99(1)	66,669	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 price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $8.925 to $9.05, 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 Mark R. Tobin	08/12/2026
	** 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)