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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>0000919574-10-002704.txt : 20100324
<SEC-HEADER>0000919574-10-002704.hdr.sgml : 20100324
<ACCEPTANCE-DATETIME>20100323174502
ACCESSION NUMBER:		0000919574-10-002704
CONFORMED SUBMISSION TYPE:	D/A
PUBLIC DOCUMENT COUNT:		1
ITEM INFORMATION:		Rule 506
ITEM INFORMATION:		Investment Company Act Section 3(c)
ITEM INFORMATION:		Section 3(c)(7)
FILED AS OF DATE:		20100324
DATE AS OF CHANGE:		20100323
EFFECTIVENESS DATE:		20100324

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Greylock Global Opportunity Institutional Fund II, Ltd.
		CENTRAL INDEX KEY:			0001355366
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			D8
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-86933
		FILM NUMBER:		10700077

	BUSINESS ADDRESS:	
		STREET 1:		SOUTH CHURCH ST P O BOX 1234
		STREET 2:		QUEENSGATE HOUSE GA TOWN
		CITY:			GRAND CAY CAY ISL BWI
		STATE:			E9
		ZIP:			00000
		BUSINESS PHONE:		345-945-6264

	MAIL ADDRESS:	
		STREET 1:		SOUTH CHURCH ST P O BOX 1234
		STREET 2:		QUEENSGATE HOUSE GA TOWN
		CITY:			GRAND CAY CAY ISL BWI
		STATE:			E9
		ZIP:			00000

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GREYLOCK GLOBAL OPPORTUNITY INSTITUTIONAL FUND II LTD
		DATE OF NAME CHANGE:	20060307
</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>0001355366</cik>
        <entityName>Greylock Global Opportunity Institutional Fund II, Ltd.</entityName>
        <issuerAddress>
            <street1>c/o Prime Management Limited</street1>
            <street2>12 Church Street, P.O. Box HM 3348</street2>
            <city>Hamilton</city>
            <stateOrCountry>D0</stateOrCountry>
            <zipCode>HM 11</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(441) 295-0329</issuerPhoneNumber>
        <jurisdictionOfInc>VIRGIN ISLANDS, BRITISH</jurisdictionOfInc>
        <edgarPreviousNameList>
            <previousName>GREYLOCK GLOBAL OPPORTUNITY INSTITUTIONAL FUND II LTD</previousName>
        </edgarPreviousNameList>
        <entityType>Other</entityType>
        <entityTypeOtherDesc>British Virgin Islands Exempted Company</entityTypeOtherDesc>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Ajata</firstName>
                <lastName>Mediratta</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Greylock Capital Management, LLC</street1>
                <street2>99 Park Avenue</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10016</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Ajata Mediratta is an executive officer of Greylock Capital Management, LLC, the Investment Manager of the Issuer.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Carol</firstName>
                <lastName>Monaghan</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Prime Management Limited</street1>
                <street2>P.O. Box HM 3348, 12 Church Street</street2>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <zipCode>HM11</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Joseph</firstName>
                <lastName>Kelly</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Prime Management Limited</street1>
                <street2>P.O. Box HM 3348, 12 Church Street</street2>
                <city>Hamilton</city>
                <stateOrCountry>D0</stateOrCountry>
                <zipCode>HM11</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Hedge Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <aggregateNetAssetValueRange>Decline to Disclose</aggregateNetAssetValueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.7</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0000919574-09-004813</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2005-12-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>100000000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>1</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
            <clarificationOfResponse>The Investment Manager (or its affiliate) is entitled to receive an annual management fee in an amount equal to a specified percentage of assets under management.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Greylock Global Opportunity Institutional Fund II, Ltd.</issuerName>
                <signatureName>/s/ Thomas Elwood</signatureName>
                <nameOfSigner>Thomas Elwood</nameOfSigner>
                <signatureTitle>Authorized Person</signatureTitle>
                <signatureDate>2010-03-23</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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