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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 O9E6oVU8PROfHJZH8ySHawIBT2mAa1VHOQ8b7hxIkvVg4gVOpaOPfpOtt8VeOOdi
 ILz81XxMnf+3Fbzng7E2PA==

<SEC-DOCUMENT>0001209191-03-017510.txt : 20030818
<SEC-HEADER>0001209191-03-017510.hdr.sgml : 20030818
<ACCEPTANCE-DATETIME>20030818114025
ACCESSION NUMBER:		0001209191-03-017510
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030815
FILED AS OF DATE:		20030818

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LIGHTBRIDGE INC
		CENTRAL INDEX KEY:			0001017172
		STANDARD INDUSTRIAL CLASSIFICATION:	RADIO TELEPHONE COMMUNICATIONS [4812]
		IRS NUMBER:				043065140
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		67 S BEDFORD ST
		CITY:			BURLINGTON
		STATE:			MA
		ZIP:			01803
		BUSINESS PHONE:		6173594000

	MAIL ADDRESS:	
		STREET 1:		67 SOUTH BEDFORD STREET
		CITY:			BURLINGTON
		STATE:			MA
		ZIP:			01803

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			DUMONT JUDITH A
		CENTRAL INDEX KEY:			0001181234

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21319
		FILM NUMBER:		03852145

	BUSINESS ADDRESS:	
		STREET 1:		C/O CARINA
		STREET 2:		231 WEST PORTEL AVENUE
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94127
		BUSINESS PHONE:		4157532274

	MAIL ADDRESS:	
		STREET 1:		C/O CARINA
		STREET 2:		231 WEST PORTEL AVENUE
		CITY:			SAN FRANCISCO
		STATE:			CA
		ZIP:			94127
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bob47505bob01jd.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-08-15</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0001017172</issuerCik><issuerName>LIGHTBRIDGE INC</issuerName>        <issuerTradingSymbol>LTBG</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001181234</rptOwnerCik><rptOwnerName>DUMONT JUDITH A</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1></rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>NAHANT</rptOwnerCity><rptOwnerState>MA</rptOwnerState><rptOwnerZipCode>01908</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>VP, Consulting Services</officerTitle></reportingOwnerRelationship></reportingOwner><nonDerivativeTable><nonDeriv
ativeTransaction><securityTitle><value>Common Stock</value></securityTitle><transactionDate><value>2003-08-15</value></transactionDate><deemedExecutionDate><value>2003-08-15</value></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>S</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>9000</value></transactionShares><transactionPricePerShare><value>10.00</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>D</value></transactionAcquiredDisposedCode></transactionAmounts><postTransactionAmounts><sharesOwnedFollowingTransaction><value>0</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></nonDerivativeTransaction></nonDerivativeTable><ownerSignature><signatureName>/s/ Judith A. Dumont </signatureName><signatureDate>2003-08-18</signatureDate></ownerSi
gnature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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