-----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,
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 LhOlof6iBKyUMboZs7I1pg==

<SEC-DOCUMENT>0001365542-11-000004.txt : 20110315
<SEC-HEADER>0001365542-11-000004.hdr.sgml : 20110315
<ACCEPTANCE-DATETIME>20110315171629
ACCESSION NUMBER:		0001365542-11-000004
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)(7)
FILED AS OF DATE:		20110315
DATE AS OF CHANGE:		20110315
EFFECTIVENESS DATE:		20110315

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			IAM MINI-FUND 18 LTD
		CENTRAL INDEX KEY:			0001484568
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-139677
		FILM NUMBER:		11689392

	BUSINESS ADDRESS:	
		STREET 1:		C/O PAGET BROWN TRUST COMPANY LIMITED
		STREET 2:		BOUNDARY HALL, CRICKET SQ, PO BOX 1111
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1102
		BUSINESS PHONE:		(888) 722-3302

	MAIL ADDRESS:	
		STREET 1:		C/O PAGET BROWN TRUST COMPANY LIMITED
		STREET 2:		BOUNDARY HALL, CRICKET SQ, PO BOX 1111
		CITY:			GRAND CAYMAN
		STATE:			E9
		ZIP:			KY1-1102

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	IAM Mini-Fund 18 Ltd
		DATE OF NAME CHANGE:	20100219
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0704</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0001484568</cik>
        <entityName>IAM MINI-FUND 18 LTD</entityName>
        <issuerAddress>
            <street1>C/O PAGET BROWN TRUST COMPANY LIMITED</street1>
            <street2>BOUNDARY HALL, CRICKET SQ, PO BOX 1111</street2>
            <city>GRAND CAYMAN</city>
            <stateOrCountry>E9</stateOrCountry>
            <stateOrCountryDescription>CAYMAN ISLANDS</stateOrCountryDescription>
            <zipCode>KY1-1102</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(917) 332 5704</issuerPhoneNumber>
        <jurisdictionOfInc>CAYMAN ISLANDS</jurisdictionOfInc>
        <edgarPreviousNameList>
            <previousName>IAM Mini-Fund 18 Ltd</previousName>
        </edgarPreviousNameList>
        <entityType>Other</entityType>
        <entityTypeOtherDesc>CAYMAN ISLANDS EXEMPTED COMPANY</entityTypeOtherDesc>
        <yearOfInc>
            <withinFiveYears>true</withinFiveYears>
            <value>2008</value>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>N/A</firstName>
                <lastName>INVESTCORP INVESTMENT ADVISERS LIMITED</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>INVESTCORP HOUSE</street1>
                <street2>P.O. BOX 5340</street2>
                <city>MANAMA</city>
                <stateOrCountry>C6</stateOrCountry>
                <stateOrCountryDescription>BAHRAIN</stateOrCountryDescription>
                <zipCode>00000</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Promoter</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>INVESTMENT MANAGER OF THE ISSUER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>HARIN DE SILVA</firstName>
                <lastName>WIJEYERATNE</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O INVESTCORP HOUSE</street1>
                <street2>P.O.BOX 5340</street2>
                <city>MANAMA</city>
                <stateOrCountry>C6</stateOrCountry>
                <stateOrCountryDescription>BAHRAIN</stateOrCountryDescription>
                <zipCode>00000</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR OF THE ISSUER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>MUFEED</firstName>
                <lastName>RAJAB</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O INVESTCORP HOUSE</street1>
                <street2>P.O. BOX 5340</street2>
                <city>MANAMA</city>
                <stateOrCountry>C6</stateOrCountry>
                <stateOrCountryDescription>BAHRAIN</stateOrCountryDescription>
                <zipCode>00000</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR OF THE ISSUER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>MICHAEL</firstName>
                <lastName>SIMATOS</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O INVESTCORP HOUSE</street1>
                <street2>P.O. BOX 5340</street2>
                <city>MANAMA</city>
                <stateOrCountry>C6</stateOrCountry>
                <stateOrCountryDescription>BAHRAIN</stateOrCountryDescription>
                <zipCode>00000</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR OF THE ISSUER</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>CRAIG</firstName>
                <lastName>SINFIELD-HAIN</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>C/O INVESTCORP HOUSE</street1>
                <street2>P.O. BOX 5340</street2>
                <city>MANAMA</city>
                <stateOrCountry>C6</stateOrCountry>
                <stateOrCountryDescription>BAHRAIN</stateOrCountryDescription>
                <zipCode>00000</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Director</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>DIRECTOR OF THE ISSUER</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>0001484568-10-000001</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2009-12-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isEquityType>true</isEquityType>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1000000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>N.A. INVESTCORP LLC</recipientName>
                <recipientCRDNumber>134162</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>280 PARK AVENUE</street1>
                    <street2>39TH FLOOR</street2>
                    <city>NEW YORK</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <stateOrCountryDescription>NEW YORK</stateOrCountryDescription>
                    <zipCode>10017</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
                <foreignSolicitation>false</foreignSolicitation>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>101000000</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>3</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>THE ISSUER DOES NOT PAY ANY SALES COMMISSIONS OR FINDER'S FEES. HOWEVER, THE ISSUER'S INVESTMENT MANAGER PAYS A PORTION OF ITS ASSET-BASED MANAGEMENT FEE TO ITS AFFILIATED BROKER-DEALER.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>IAM MINI-FUND 18 LTD</issuerName>
                <signatureName>MUFEED RAJAB</signatureName>
                <nameOfSigner>MUFEED RAJAB</nameOfSigner>
                <signatureTitle>DIRECTOR</signatureTitle>
                <signatureDate>2011-03-15</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----