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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1084554	Lightbridge Corp	LTBR	Services-Management Consulting Services (8742)	911975651

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1044321	M David Greenhouse & W Austin Marxe	C/O Special Situations Funds 527 Madison Avenue, Suite 2600 New York NY 10022		No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2013-10-14	30,000	$1.83	1,249,032	No	4	S	Indirect	By Limited Partnerships
Common Stock	Disposition	2013-10-15	13,576	$1.90	1,235,456	No	4	S	Indirect	By Limited Partnerships

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	By Limited Partnerships
No	4	S	Indirect	By Limited Partnerships

Footnotes

This is a weighted average price.
This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P. (QP), Special Situations Cayman Fund, L.P. (Cayman) and Special Situations Private Equity Fund, L.P. (PE). 772,157 shares of Common Stock are held by QP, 257,386 shares of Common Stock are held by Cayman, 205,913 shares of Common Stock are held by PE. The interest of Marxe and Greenhouse in the shares of Common Stock owned by QP, Cayman and PE is limited to the extent of his pecuniary interest.
This is a joint filing by Austin W. Marxe (Marxe) and David M. Greenhouse (Greenhouse). They share voting and investment control over all securities owned by Special Situations Fund III QP, L.P (QP), Special Situations Cayman Fund, L.P. (Cayman) and Special Situations Private Equity Fund, LP (PE). 284,091 Warrants are owned by QP, 94,697 Warrants are owned by Cayman and 75,758 Warrants are owned by PE. The interest of Marxe and Greenhouse in the shares of Warrants owned by QP, Cayman and PE are limited to the extent of his pecuniary interest.
The Warrants described above may be exercised to the extent that the total number of shares of Common Stock then beneficially owned does not exceed 4.99% of the outstanding shares. The Holder may request an increase of up to 9.99% of the outstanding shares, effective on the 61st day after notice is given to the Company.