-----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,
 UkTgkGStKffSCs0TJUYf7tO7VP4NvaNnU7wG4pvV0qvjxtwZmaaMMmu+hCYiyYRf
 52aqsNykUpb6urzSY0unrg==

<SEC-DOCUMENT>0001372084-10-000005.txt : 20100629
<SEC-HEADER>0001372084-10-000005.hdr.sgml : 20100629
<ACCEPTANCE-DATETIME>20100629160749
ACCESSION NUMBER:		0001372084-10-000005
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:		20100629
DATE AS OF CHANGE:		20100629
EFFECTIVENESS DATE:		20100629

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Blackthorn Partners L.P.
		CENTRAL INDEX KEY:			0001372078
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-93478
		FILM NUMBER:		10923386

	BUSINESS ADDRESS:	
		STREET 1:		10975 Grandview Dr
		STREET 2:		Suite 150
		CITY:			Overland Park
		STATE:			KS
		ZIP:			66210
		BUSINESS PHONE:		913-451-7770

	MAIL ADDRESS:	
		STREET 1:		10975 Grandview Dr
		STREET 2:		Suite 150
		CITY:			Overland Park
		STATE:			KS
		ZIP:			66210
</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>0001372078</cik>
        <entityName>Blackthorn Partners L.P.</entityName>
        <issuerAddress>
            <street1>10975 Grandview Dr</street1>
            <street2>Suite 150</street2>
            <city>Overland Park</city>
            <stateOrCountry>KS</stateOrCountry>
            <stateOrCountryDescription>KANSAS</stateOrCountryDescription>
            <zipCode>66210</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>913-451-7770</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</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>Montgomery</firstName>
                <lastName>McClain</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Blackthorn Capital, L.L.C.</street1>
                <street2>10975 Grandview Drive, Suite 150</street2>
                <city>Overland Park</city>
                <stateOrCountry>KS</stateOrCountry>
                <stateOrCountryDescription>KANSAS</stateOrCountryDescription>
                <zipCode>66210</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Founder and Member of Blackthorn Capital, L.L.C., the Issuer's General Partner.</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Todd</firstName>
                <lastName>Banks</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>Blackthorn Capital, L.L.C.</street1>
                <street2>10975 Grandview Drive, Suite 150</street2>
                <city>Overland Park</city>
                <stateOrCountry>KS</stateOrCountry>
                <stateOrCountryDescription>KANSAS</stateOrCountryDescription>
                <zipCode>66210</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Founder and Managing Member of Blackthorn Capital, L.L.C., the Issuer's General Partner.</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.1</item>
        </federalExemptionsExclusions>
        <typeOfFiling>
            <newOrAmendment>
                <isAmendment>true</isAmendment>
                <previousAccessionNumber>0001372078-10-000003</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>1999-01-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
            <clarificationOfResponse></clarificationOfResponse>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>1</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>438283695</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse></clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>94</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
            </findersFees>
            <clarificationOfResponse></clarificationOfResponse>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
            </grossProceedsUsed>
            <clarificationOfResponse>Customary advisory fees are paid by the Issuer to the Investment Manager as provided for in the Issuer's offering material.</clarificationOfResponse>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>Blackthorn Partners L.P.</issuerName>
                <signatureName>Montgomery McClain</signatureName>
                <nameOfSigner>Montgomery McClain</nameOfSigner>
                <signatureTitle>Founder and Member of the Issuer's G.P.</signatureTitle>
                <signatureDate>2010-06-23</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----