LIGHTBRIDGE Corp — Director's Dealing 2011

Jul 26, 2011

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LIGHTBRIDGE Corp (LTBR)
CIK: 0001084554
Period of Report: 2011-07-22

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

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2011-07-22	Common Stock	P	5100	$2.6674	Acquired	1331964	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). 832,475 shares of Common Stock are held by QP, 277,492 shares of Common Stock are held by Cayman, 221,997 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.