-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 CHNvFuqPYQBNgKe62os1brKIB9zgEF+Uia4u/ptvUEycyquk3cR5Kp9eE4bLaNJr
 2Hr02e2WA7L4NLLWIxDhDQ==

<SEC-DOCUMENT>0001454762-09-000002.txt : 20090518
<SEC-HEADER>0001454762-09-000002.hdr.sgml : 20090518
<ACCEPTANCE-DATETIME>20090518162623
ACCESSION NUMBER:		0001454762-09-000002
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
FILED AS OF DATE:		20090518
DATE AS OF CHANGE:		20090518
EFFECTIVENESS DATE:		20090518

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			R2 SEMICONDUCTOR INC
		CENTRAL INDEX KEY:			0001454762
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-126374
		FILM NUMBER:		09836981

	BUSINESS ADDRESS:	
		STREET 1:		1277 NORTH BORREGAS AVE., STE. 100
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94089
		BUSINESS PHONE:		650-218-4680

	MAIL ADDRESS:	
		STREET 1:		1277 NORTH BORREGAS AVE., STE. 100
		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>X0301</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001454762</cik>
        <entityName>R2 SEMICONDUCTOR INC</entityName>
        <issuerAddress>
            <street1>1277 NORTH BORREGAS AVE., STE. 100</street1>
            <street2></street2>
            <city>SUNNYVALE</city>
            <stateOrCountry>CA</stateOrCountry>
            <zipCode>94089</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>650-218-4680</issuerPhoneNumber>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <jurisdictionOfInc>DE</jurisdictionOfInc>
        <entityType>Corporation</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2008</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>David</firstName>
                <middleName></middleName>
                <lastName>Fisher</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1277 North Borregas Avenue, Suite 100</street1>
                <street2></street2>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
                <relationship>Director</relationship>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Fahri</firstName>
                <middleName></middleName>
                <lastName>Diner</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1600 El Camino Real, Suite 280</street1>
                <street2></street2>
                <city>Menlo Park</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94025</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName></middleName>
                <lastName>Schwartz</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1277 North Borregas Avenue, Suite 100</street1>
                <street2></street2>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Drew</firstName>
                <middleName></middleName>
                <lastName>Lanza</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>2710 Sand Hill Road, Suite 100</street1>
                <street2></street2>
                <city>Menlo Park</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94025</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Richard</firstName>
                <middleName></middleName>
                <lastName>Sanquini</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1277 North Borregas Avenue, Suite 100</street1>
                <street2></street2>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Andrew</firstName>
                <middleName></middleName>
                <lastName>Hartland</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>1277 North Borregas Avenue, Suite 100</street1>
                <street2></street2>
                <city>Sunnyvale</city>
                <stateOrCountry>CA</stateOrCountry>
                <zipCode>94089</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Other Technology</industryGroupType>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>9999999997-09-002257</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2008-12-24</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>13000000</totalOfferingAmount>
            <totalAmountSold>13000000</totalAmountSold>
            <totalRemaining>0</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>13000000</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>R2 SEMICONDUCTOR INC</issuerName>
                <signatureName>/s/ David Fisher</signatureName>
                <nameOfSigner>David Fisher</nameOfSigner>
                <signatureTitle>President and CEO</signatureTitle>
                <signatureDate>2009-05-14</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----