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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 dza/WhR6OtoDPQqeijDpig==

<SEC-DOCUMENT>0001209191-03-023953.txt : 20031001
<SEC-HEADER>0001209191-03-023953.hdr.sgml : 20031001
<ACCEPTANCE-DATETIME>20031001214913
ACCESSION NUMBER:		0001209191-03-023953
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20031001
FILED AS OF DATE:		20031001

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			WEISSMAN IRVING
		CENTRAL INDEX KEY:			0001230630

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-19871
		FILM NUMBER:		03922079

	BUSINESS ADDRESS:	
		STREET 1:		3155 PORTER DRIVE
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94304
		BUSINESS PHONE:		6504753100

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STEMCELLS INC
		CENTRAL INDEX KEY:			0000883975
		STANDARD INDUSTRIAL CLASSIFICATION:	BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836]
		IRS NUMBER:				943078125
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		3155 PORTER DRIVE
		STREET 2:		.
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94304
		BUSINESS PHONE:		6504753100

	MAIL ADDRESS:	
		STREET 1:		3155 PORTER DRIVE
		STREET 2:		.
		CITY:			PALO ALTO
		STATE:			CA
		ZIP:			94304

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	CYTOTHERAPEUTICS INC/DE
		DATE OF NAME CHANGE:	19930328
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
<XML>
<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-10-01</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000883975</issuerCik><issuerName>STEMCELLS INC</issuerName>        <issuerTradingSymbol>stem</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001230630</rptOwnerCik><rptOwnerName>WEISSMAN IRVING</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>C/O STEMCELLS, INC.</rptOwnerStreet1><rptOwnerStreet2>3155 PORTER DRIVE</rptOwnerStreet2><rptOwnerCity>PALO ALTO</rptOwnerCity><rptOwnerState>CA</rptOwnerState><rptOwnerZipCode>94304</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><sec
urityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>1.94</value></conversionOrExercisePrice><transactionDate><value>2003-10-01</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F1" /></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>15000</value></transactionShares><transactionPricePerShare><value>0</value><footnoteId id="F1" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-10-01</value><footnoteId id="F1" /></exerciseDate><expirationDate><value>2013-10-01</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares>
<value>15000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>15000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">In addition to options for stipend and meeting attendance, compensated non-employee directors receive an option for 20,000 shares of the Company's common stock on appointment to the Board of Directors as such, and 15,000 shares on each third anniversary of appointment, with a strike price equal to the closing price of the stock on such date and vesting one third on each of the first three anniversaries of each such option.  Dr. Weissman became a compensated non-employee member of the Board as of October 1, 2000.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>Irving Weissman by Iris Brest, Attorney-in-Fact</sig
natureName><signatureDate>2003-10-01</signatureDate></ownerSignature></ownershipDocument>

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