-----BEGIN PRIVACY-ENHANCED MESSAGE-----
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,
 HM6F6AciSrrJlJrYkh+/cNSVBshSf/17m8Ie5g/7lzxNn4Teimexd4EfK+2qsU1c
 2AZ4csxURV40vAsF1DVyMw==

<SEC-DOCUMENT>0000931948-09-000034.txt : 20090820
<SEC-HEADER>0000931948-09-000034.hdr.sgml : 20090820
<ACCEPTANCE-DATETIME>20090820111744
ACCESSION NUMBER:		0000931948-09-000034
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20090819
FILED AS OF DATE:		20090820
DATE AS OF CHANGE:		20090820

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			RIEGLE DONALD W JR
		CENTRAL INDEX KEY:			0001195829

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-13053
		FILM NUMBER:		091025864

	MAIL ADDRESS:	
		STREET 1:		WELLPOINT, INC
		STREET 2:		120 MONUMENT CIRCLE
		CITY:			INDIANAPOLIS
		STATE:			IN
		ZIP:			46204

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			STILLWATER MINING CO /DE/
		CENTRAL INDEX KEY:			0000931948
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS METAL ORES [1090]
		IRS NUMBER:				810480654
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		536 EAST PIKE AVENUE
		STREET 2:		P O BOX 1330
		CITY:			COLUMBUS
		STATE:			MT
		ZIP:			59019
		BUSINESS PHONE:		406.373.8700

	MAIL ADDRESS:	
		STREET 1:		536 EAST PIKE AVENUE
		STREET 2:		P O BOX 1330
		CITY:			COLUMBUS
		STATE:			MT
		ZIP:			59019
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-08-19</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000931948</issuerCik>
        <issuerName>STILLWATER MINING CO /DE/</issuerName>
        <issuerTradingSymbol>swc</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001195829</rptOwnerCik>
            <rptOwnerName>RIEGLE DONALD W JR</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>WELLPOINT, INC</rptOwnerStreet1>
            <rptOwnerStreet2>120 MONUMENT CIRCLE</rptOwnerStreet2>
            <rptOwnerCity>INDIANAPOLIS</rptOwnerCity>
            <rptOwnerState>IN</rptOwnerState>
            <rptOwnerZipCode>46204</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <otherText>Former Director</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2009-08-19</value>
            </transactionDate>
            <deemedExecutionDate>
                <value>2009-08-19</value>
            </deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>7457</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>6.46</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>9506</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <ownerSignature>
        <signatureName>/s/  Donald W. Riegle, Jr.</signatureName>
        <signatureDate>2009-08-20</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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