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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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<SEC-DOCUMENT>0001209191-03-023655.txt : 20031001
<SEC-HEADER>0001209191-03-023655.hdr.sgml : 20031001
<ACCEPTANCE-DATETIME>20031001121716
ACCESSION NUMBER:		0001209191-03-023655
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030930
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:		03919668

	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>2003-09-30</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>0.25</value></conversionOrExercisePrice><transactionDate><value>2003-09-30</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>3922</value></transactionShares><transactionPricePerShare><value>0</value><footnoteId id="F1" /></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-09-30</value></exerciseDate><expirationDate><value>2013-09-30</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>3922</value></un
derlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>3922</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction><derivativeTransaction><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>0.1</value></conversionOrExercisePrice><transactionDate><value>2003-10-01</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved><footnoteId id="F2" /></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>7225</value></transactionShares><transactionPricePerShare><value>0</value><footnoteId id="F2" /></transactionPricePerShare><transactionAcquiredDisposed
Code><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-10-01</value></exerciseDate><expirationDate><value>2013-10-01</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>7225</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>7225</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes><footnote id="F1">Compensation for service on the Board of Directors and for attendance at Board meetings.  Non-employee directors receive compensation in the form of options to purchase shares of the Company's common stock at below market prices ($0.25 per share), in lieu of cash payments of $4,500 quarterly, $1,500 per meeting attended in person 
or videoconference, and $500 for a meeting attended by telephone.  The number of shares is calculated using the closing price of the Company's common stock for the date of a Board or Committee meeting or, with respect to the quarterly retainer payments, the closing price for the last business day of the quarter, less the option price of $0.25 per share.  Options so issued vest immediately.</footnote><footnote id="F2">Compensation for service as a Consultant to the Company, payable at the Company's election either in cash ($12,500 quarterly) or in the form of options to purchase shares of the Company's common stock at a below market price ($0.10 per share).  The number of shares is calculated using the average of the closing prices of the Company's common stock for the 20 trading days prior to payment, less the option price of $0.10 per share.  Payment is normally made quarterly in advance, but payment in stock options for the fourth quarter of 2002 was only authorized on October 24, 2002.  Options so issued 
vest immediately.</footnote></footnotes><remarks></remarks><ownerSignature><signatureName>Irving Weissman by Iris Brest, Attorney-in-Fact</signatureName><signatureDate>2003-10-01</signatureDate></ownerSignature></ownershipDocument>

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