LIGHTBRIDGE Corp — Director's Dealing 2011

Aug 4, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LIGHTBRIDGE Corp (LTBR)
CIK: 0001084554
Period of Report: 2011-08-02

Reporting Person: MARXE AUSTIN W & GREENHOUSE DAVID M (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-08-02	Common Stock	P	15034	$2.5992	Acquired	1333320	Indirect
2011-08-03	Common Stock	P	16900	$2.6366	Acquired	1350220	Indirect

Footnotes

F1: This is a weighted average price.

F2: 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). 843,884 shares of Common Stock are held by QP, 281,295 shares of Common Stock are held by Cayman, 225,041 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.