-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
 UGV1yJSo7FpTy/MxTm+64yS+is9ubYQw3sz0MC11V4sthGs3Kc8Z1AXVRSagUxDa
 RxL+SCdA6CG+hrGuPeqTgg==

<SEC-DOCUMENT>0001001315-10-000003.txt : 20100316
<SEC-HEADER>0001001315-10-000003.hdr.sgml : 20100316
<ACCEPTANCE-DATETIME>20100316111303
ACCESSION NUMBER:		0001001315-10-000003
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:		20100316
DATE AS OF CHANGE:		20100316
EFFECTIVENESS DATE:		20100316

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MESIROW ALTERNATIVE STRATEGIES FUND LP
		CENTRAL INDEX KEY:			0001001315
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			IL
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-139639
		FILM NUMBER:		10684165

	BUSINESS ADDRESS:	
		STREET 1:		321 NORTH CLARK STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60654
		BUSINESS PHONE:		7089261831

	MAIL ADDRESS:	
		STREET 1:		321 NORTH CLARK STREET
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60654
</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>0001001315</cik>
        <entityName>MESIROW ALTERNATIVE STRATEGIES FUND LP</entityName>
        <issuerAddress>
            <street1>321 NORTH CLARK STREET</street1>
            <city>CHICAGO</city>
            <stateOrCountry>IL</stateOrCountry>
            <zipCode>60654</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>7089261831</issuerPhoneNumber>
        <jurisdictionOfInc>ILLINOIS</jurisdictionOfInc>
        <issuerPreviousNameList>
            <value>None</value>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <value>None</value>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>n/a</firstName>
                <lastName>Mesirow Advanced Strategies, Inc.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>353 North Clark Street, 16th Floor</street1>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Howard</firstName>
                <middleName>M</middleName>
                <lastName>Rossman</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Brian</firstName>
                <middleName>D</middleName>
                <lastName>Cornell</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Martin</firstName>
                <middleName>B</middleName>
                <lastName>Kaplan</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Gregory</firstName>
                <middleName>J</middleName>
                <lastName>Robbins</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Stephen</firstName>
                <middleName>C</middleName>
                <lastName>Vogt</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Thomas</firstName>
                <lastName>Macina</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification></relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Eric</firstName>
                <middleName>D</middleName>
                <lastName>Siegel</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Mesirow Advanced Strategies, Inc.</street1>
                <street2>353 North Clark Street, 16th Floor</street2>
                <city>Chicago</city>
                <stateOrCountry>IL</stateOrCountry>
                <zipCode>60654</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</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>0001001315-10-000002</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>1995-01-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>5000000</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Mesirow Financial, Inc.</recipientName>
                <recipientCRDNumber>2764</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>353 North Clark Street</street1>
                    <city>Chicago</city>
                    <stateOrCountry>IL</stateOrCountry>
                    <zipCode>60654</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Citigroup Global Markets, Inc.</recipientName>
                <recipientCRDNumber>7059</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>390-388 Greenwich Street</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10013</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Wachovia Securities, Inc.</recipientName>
                <recipientCRDNumber>19616</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>One North Jefferson</street1>
                    <city>St. Louis</city>
                    <stateOrCountry>MO</stateOrCountry>
                    <zipCode>63103</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Thomas Weisel Partners LLC</recipientName>
                <recipientCRDNumber>46237</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>One Montgomery Street</street1>
                    <street2>Suite 3700</street2>
                    <city>San Francisco</city>
                    <stateOrCountry>CA</stateOrCountry>
                    <zipCode>94104</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>1829796709</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse>The Form D filing made earlier today is actually an amendment. Because prior Form Ds were filed in paper format and were not reflected on EDGAR, the Issuer was technically unable to file such document as anything other than a &quot;New Notice&quot;.</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>325</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>650587</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse>GP pays % of mgmnt fee to selling agents w/out reimbursement from Issuer. Aforesaid compensation not paid out of offering proceeds. Breakdown: Mes-$10,759; SB-$92,830; Wachov-$92,865; Weisel-$454,133. Requested info commences on 3/15/09.</clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse></clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>MESIROW ALTERNATIVE STRATEGIES FUND LP</issuerName>
                <signatureName>Gregory J. Robbins</signatureName>
                <nameOfSigner>Gregory J. Robbins</nameOfSigner>
                <signatureTitle>General Counsel and managing Director of the General Partner</signatureTitle>
                <signatureDate>2010-03-16</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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