-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 oMDXia5h5fscyko/GfksWg==

<SEC-DOCUMENT>0001418835-09-000004.txt : 20091106
<SEC-HEADER>0001418835-09-000004.hdr.sgml : 20091106
<ACCEPTANCE-DATETIME>20091105193644
ACCESSION NUMBER:		0001418835-09-000004
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20091106
DATE AS OF CHANGE:		20091105
EFFECTIVENESS DATE:		20091106

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Serious Materials Inc
		CENTRAL INDEX KEY:			0001418835
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-111223
		FILM NUMBER:		091162499

	BUSINESS ADDRESS:	
		STREET 1:		1250 Elko Drive
		CITY:			Sunnyvale
		STATE:			CA
		ZIP:			94089
		BUSINESS PHONE:		(408) 541-8000

	MAIL ADDRESS:	
		STREET 1:		1250 Elko Drive
		CITY:			Sunnyvale
		STATE:			CA
		ZIP:			94089
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001418835</cik>
        <entityName>Serious Materials Inc</entityName>
        <issuerAddress>
            <street1>1250 Elko Drive</street1>
            <city>Sunnyvale</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>94089</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(408) 541-8000</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2007</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Kevin</firstName>
                <lastName>Surace</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1250 Elko Drive</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Marc</firstName>
                <lastName>Porat</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1250 Elko Drive</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Patrick</firstName>
                <lastName>Murray</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1250 Elko Drive</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Mark</firstName>
                <lastName>Mitchell</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1250 Elko Drive</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Michael</firstName>
                <lastName>Danaher</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>650 Page Mill Road</street1>
                <city>Palo Alto</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <lastName>Babcock</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>2425 Olympic Blvd.</street1>
                <street2>Suite 6050</street2>
                <city>Santa Monica</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>90404</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Forest</firstName>
                <lastName>Baskett</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>119 St. Paul Street</street1>
                <city>Baltimore</city>
                <stateOrCountry>MD</stateOrCountry>
                <zipCode>21202</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Alan</firstName>
                <lastName>Thielemann</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1250 Elko Drive</street1>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <lastName>Galuhn</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>350 N. Clark St..</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Paul</firstName>
                <lastName>Holland</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>70 Willow Road</street1>
                <street2>Suite 200</street2>
                <city>Menlo Park</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94025</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <lastName>McDunough</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1001 Bayhill Drive</street1>
                <street2>Suite 300</street2>
                <city>San Bruno</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94066</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Manufacturing</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001418835-09-000003</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-08-25</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>64094992</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>10</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>300000</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Serious Materials Inc</issuerName>
                <signatureName>Patrick Murray</signatureName>
                <nameOfSigner>Patrick Murray</nameOfSigner>
                <signatureTitle>Chief Financial Officer</signatureTitle>
                <signatureDate>2009-11-05</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----