LIGHTBRIDGE Corp — Director's Dealing 2015

May 20, 2015

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LIGHTBRIDGE Corp (LTBR)
CIK: 0001084554
Period of Report: 2015-05-18

Reporting Person: AWM Investment Company, Inc. (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2015-05-18	Common Stock	S	2250000	$2.2261	Disposed	1199954	Indirect

Footnotes

F1: AWM Investment Company, Inc., a Delaware Corporation (AWM), is the investment adviser to Special Situations Fund III QP, L.P. (QP), Special Situations Cayman Fund, L.P. (CAYMAN) and Special Situations Private Equity Fund, L.P. (PE and together with QP and CAYMAN, the Funds). As the investment adviser to the Funds, AWM holds sole voting and investment power over 728,444 shares of Common Stock of the Issuer (the Shares) held by QP, 246,121 Shares held by CAYMAN and 225,389 Shares held by PE. Austin W. Marxe (Marxe), David M. Greenhouse (Greenhouse) and Adam C. Stettner (Stettner) are the controlling principals of AWM. The reporting person disclaims beneficial ownership of the Shares, except to the extent of its pecuniary interest therein. This report shall not be deemed an admission that the reporting person is the beneficial owner of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose.

F2: This is a weighted average price.