-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 UlgL3UvPon3cygf+RJDKvaKX+fTLEQJ/DW1uPLuj9xOHjjoDTacoFd5rbzy3BExB
 j3hAaFW8SI/EPZ6Pb467Kw==

<SEC-DOCUMENT>0000902664-10-002052.txt : 20100316
<SEC-HEADER>0000902664-10-002052.hdr.sgml : 20100316
<ACCEPTANCE-DATETIME>20100315202210
ACCESSION NUMBER:		0000902664-10-002052
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:		20100315
EFFECTIVENESS DATE:		20100316

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			NB Long/Short Fund L.P.
		CENTRAL INDEX KEY:			0001216366
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-52302
		FILM NUMBER:		10683471

	BUSINESS ADDRESS:	
		STREET 1:		605 THIRD AVENUE
		STREET 2:		22ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10158
		BUSINESS PHONE:		(212) 526-2397

	MAIL ADDRESS:	
		STREET 1:		605 THIRD AVENUE
		STREET 2:		22ND FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10158

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LEHMAN BROTHERS LONG SHORT FUND LP
		DATE OF NAME CHANGE:	20030129
</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>0001216366</cik>
        <entityName>NB Long/Short Fund L.P.</entityName>
        <issuerAddress>
            <street1>605 THIRD AVENUE</street1>
            <street2>22ND FLOOR</street2>
            <city>NEW YORK</city>
            <stateOrCountry>NY</stateOrCountry>
            <zipCode>10158</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>(212) 526-2397</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList>
            <previousName>Lehman Brothers Long/Short Fund, L.P.</previousName>
        </issuerPreviousNameList>
        <edgarPreviousNameList>
            <previousName>LEHMAN BROTHERS LONG SHORT FUND LP</previousName>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>NB Alternative Investment Management GP LLC</firstName>
                <lastName>NB Alternative Investment Management GP LLC</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>605 Third Avenue</street1>
                <street2>22nd Floor</street2>
                <city>New York</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>10158</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>General Partner of the Limited Partnership</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>9999999997-09-011471</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>2002-01-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>0</minimumInvestmentAccepted>
        <salesCompensationList>
            <recipient>
                <recipientName>Barclays Capital Inc.</recipientName>
                <recipientCRDNumber>19714</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>399 Park Avenue</street1>
                    <street2>6th Floor</street2>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10022</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>UBS Financial Services Inc.</recipientName>
                <recipientCRDNumber>8174</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>51 West 52nd Street</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10019</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Credit Suisse Securities (USA) LLC</recipientName>
                <recipientCRDNumber>816</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>11 Madison Avenue</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10010</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
            <recipient>
                <recipientName>Morgan Stanley &amp; Co. Incorporated</recipientName>
                <recipientCRDNumber>8209</recipientCRDNumber>
                <associatedBDName>None</associatedBDName>
                <associatedBDCRDNumber>None</associatedBDCRDNumber>
                <recipientAddress>
                    <street1>522 Fifth Avenue, 13th Floor</street1>
                    <city>New York</city>
                    <stateOrCountry>NY</stateOrCountry>
                    <zipCode>10036</zipCode>
                </recipientAddress>
                <statesOfSolicitationList>
                    <value>All States</value>
                </statesOfSolicitationList>
            </recipient>
        </salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>272396774</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>281</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>353186</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>The fund charges a management fee that is described in the fund's governing documents</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>NB Long/Short Fund L.P.</issuerName>
                <signatureName>/s/ Michael Rees</signatureName>
                <nameOfSigner>Michael Rees</nameOfSigner>
                <signatureTitle>Authorized Signatory</signatureTitle>
                <signatureDate>2010-03-15</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----