-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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MIC-Info: RSA-MD5,RSA,
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 PpUwO0VE5qKTnpPlapWWHg==

<SEC-DOCUMENT>0001451137-09-000004.txt : 20091125
<SEC-HEADER>0001451137-09-000004.hdr.sgml : 20091125
<ACCEPTANCE-DATETIME>20091125161150
ACCESSION NUMBER:		0001451137-09-000004
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)(1)
FILED AS OF DATE:		20091125
DATE AS OF CHANGE:		20091125
EFFECTIVENESS DATE:		20091125

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Seaport Co-Invest IV, L.P.
		CENTRAL INDEX KEY:			0001451137
		IRS NUMBER:				262519763
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-124826
		FILM NUMBER:		091208583

	BUSINESS ADDRESS:	
		STREET 1:		One Seaport Plaza
		STREET 2:		199 Water Street, 20th Floor
		CITY:			New york
		STATE:			NY
		ZIP:			10038
		BUSINESS PHONE:		212-847-8900

	MAIL ADDRESS:	
		STREET 1:		One Seaport Plaza
		STREET 2:		199 Water Street, 20th Floor
		CITY:			New york
		STATE:			NY
		ZIP:			10038
</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>0001451137</cik>
        <entityName>Seaport Co-Invest IV, L.P.</entityName>
        <issuerAddress>
            <street1>One Seaport Plaza</street1>
            <street2>199 Water Street, 20th Floor</street2>
            <city>New York</city>
            <stateOrCountry>NY</stateOrCountry>
            <zipCode>10038</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>212-847-8900</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2008</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Howard</firstName>
                <middleName>M.</middleName>
                <lastName>Kaufman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Seaport Capital, LLC</street1>
                <street2>1 Seaport Plaza, 199 Water St., 20th Fl.</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10038</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>James</firstName>
                <middleName>J.</middleName>
                <lastName>Collis</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Seaport Capital, LLC</street1>
                <street2>1 Seaport Plaza, 199 Water St., 20th Fl.</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10038</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>M.</firstName>
                <middleName>Scott</middleName>
                <lastName>McCormack</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Seaport Capital, LLC</street1>
                <street2>1 Seaport Plaza, 199 Water St., 20th Fl.</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10038</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Robert</firstName>
                <middleName>R.</middleName>
                <lastName>Tamashunas</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Seaport Capital, LLC</street1>
                <street2>1 Seaport Plaza, 199 Water St., 20th Fl.</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10038</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>K.</middleName>
                <lastName>Luby</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Seaport Capital, LLC</street1>
                <street2>1 Seaport Plaza, 199 Water St., 20th Fl.</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10038</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
    </relatedPersonsList>

    <offeringData>
        <industryGroup>
            <industryGroupType>Pooled Investment Fund</industryGroupType>
            <investmentFundInfo>
                <investmentFundType>Private Equity Fund</investmentFundType>
                <is40Act>false</is40Act>
            </investmentFundInfo>
        </industryGroup>
        <issuerSize>
            <revenueRange>Decline to Disclose</revenueRange>
        </issuerSize>
        <federalExemptionsExclusions>
            <item>06</item>
            <item>3C</item>
            <item>3C.1</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>9999999997-08-047299</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <yetToOccur>true</yetToOccur>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>false</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>3825</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>800000</totalOfferingAmount>
            <totalAmountSold>0</totalAmountSold>
            <totalRemaining>800000</totalRemaining>
            <clarificationOfResponse>Issuer reserves the right to offer greater or lesser amounts of limited partnership interests.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>0</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>*Estimated aggregate amount for the first six years; thereafter the Issuer shall continue to pay management fees.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Seaport Co-Invest IV, L.P.</issuerName>
                <signatureName>Howard Kaufman</signatureName>
                <nameOfSigner>Howard Kaufman</nameOfSigner>
                <signatureTitle>Authorized Signatory of General Partner of GP of Issuer</signatureTitle>
                <signatureDate>2009-11-23</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----