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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000898432-10-000063.txt : 20100127
<SEC-HEADER>0000898432-10-000063.hdr.sgml : 20100127
<ACCEPTANCE-DATETIME>20100127130147
ACCESSION NUMBER:		0000898432-10-000063
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:		20100127
DATE AS OF CHANGE:		20100127
EFFECTIVENESS DATE:		20100127

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERIDIAN HORIZON FUND L P
		CENTRAL INDEX KEY:			0000931173
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		D/A
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	021-93117-3N
		FILM NUMBER:		10549884

	BUSINESS ADDRESS:	
		STREET 1:		20 CORPORATE WOODS BOUVLEVARD 4TH FL
		CITY:			ALBANY
		STATE:			NY
		ZIP:			12211
		BUSINESS PHONE:		518-432-1600

	MAIL ADDRESS:	
		STREET 1:		20 CORPORATE WOODS BOUVLEVARD 4TH FL
		CITY:			ALBANY
		STATE:			NY
		ZIP:			12211

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ULTIMA FUND LP
		DATE OF NAME CHANGE:	19971120
</SEC-HEADER>
<DOCUMENT>
<TYPE>D/A
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
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<edgarSubmission>

    <schemaVersion>X0603</schemaVersion>

    <submissionType>D/A</submissionType>

    <testOrLive>LIVE</testOrLive>

    <primaryIssuer>
        <cik>0000931173</cik>
        <entityName>MERIDIAN HORIZON FUND L P</entityName>
        <issuerAddress>
            <street1>20 CORPORATE WOODS BOUVLEVARD 4TH FL</street1>
            <city>ALBANY</city>
            <stateOrCountry>NY</stateOrCountry>
            <zipCode>12211</zipCode>
        </issuerAddress>
        <issuerPhoneNumber>518-432-1600</issuerPhoneNumber>
        <jurisdictionOfInc>DELAWARE</jurisdictionOfInc>
        <issuerPreviousNameList></issuerPreviousNameList>
        <edgarPreviousNameList>
            <previousName>ULTIMA FUND LP</previousName>
        </edgarPreviousNameList>
        <entityType>Limited Partnership</entityType>
        <yearOfInc>
            <overFiveYears>true</overFiveYears>
        </yearOfInc>
    </primaryIssuer>

    <relatedPersonsList>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>N/A</firstName>
                <lastName>Meridian Capital Partners, Inc.</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>20 Corporate Woods Boulevard, 4th Floor</street1>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>William</firstName>
                <middleName>H.</middleName>
                <lastName>Lawrence</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Meridian Capital Partners, Inc.</street1>
                <street2>20 Corporate Woods Boulevard, 4th Floor</street2>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer of Meridian Capital Partners, Inc., General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Donald</firstName>
                <middleName>J.</middleName>
                <lastName>Halldin</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Meridian Capital Partners, Inc.</street1>
                <street2>20 Corporate Woods Boulevard, 4th Floor</street2>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer of Meridian Capital Partners, Inc., General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>John</firstName>
                <lastName>Sica</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Meridian Capital Partners, Inc.</street1>
                <street2>20 Corporate Woods Boulevard, 4th Floor</street2>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer of Meridian Capital Partners, Inc., General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Timothy</firstName>
                <middleName>M.</middleName>
                <lastName>Hickey</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Meridian Capital Partners, Inc.</street1>
                <street2>20 Corporate Woods Boulevard, 4th Floor</street2>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer of Meridian Capital Partners, Inc., General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Peter</firstName>
                <lastName>Brown</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Meridian Capital Partners, Inc.</street1>
                <street2>20 Corporate Woods Boulevard, 4th Floor</street2>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer of Meridian Capital Partners, Inc., General Partner of the Issuer</relationshipClarification>
        </relatedPersonInfo>
        <relatedPersonInfo>
            <relatedPersonName>
                <firstName>Laura</firstName>
                <middleName>K.</middleName>
                <lastName>Smith</lastName>
            </relatedPersonName>
            <relatedPersonAddress>
                <street1>c/o Meridian Capital Partners, Inc.</street1>
                <street2>20 Corporate Woods Boulevard, 4th Floor</street2>
                <city>Albany</city>
                <stateOrCountry>NY</stateOrCountry>
                <zipCode>12211</zipCode>
            </relatedPersonAddress>
            <relatedPersonRelationshipList>
                <relationship>Executive Officer</relationship>
            </relatedPersonRelationshipList>
            <relationshipClarification>Officer of Meridian Capital Partners, Inc., General Partner 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>9999999997-02-058703</previousAccessionNumber>
            </newOrAmendment>
            <dateOfFirstSale>
                <value>1994-10-01</value>
            </dateOfFirstSale>
        </typeOfFiling>
        <durationOfOffering>
            <moreThanOneYear>true</moreThanOneYear>
        </durationOfOffering>
        <typesOfSecuritiesOffered>
            <isPooledInvestmentFundType>true</isPooledInvestmentFundType>
        </typesOfSecuritiesOffered>
        <businessCombinationTransaction>
            <isBusinessCombinationTransaction>false</isBusinessCombinationTransaction>
        </businessCombinationTransaction>
        <minimumInvestmentAccepted>5000000</minimumInvestmentAccepted>
        <salesCompensationList></salesCompensationList>
        <offeringSalesAmounts>
            <totalOfferingAmount>Indefinite</totalOfferingAmount>
            <totalAmountSold>453388562</totalAmountSold>
            <totalRemaining>Indefinite</totalRemaining>
            <clarificationOfResponse>Minimum Investment amount may be waived</clarificationOfResponse>
        </offeringSalesAmounts>
        <investors>
            <hasNonAccreditedInvestors>false</hasNonAccreditedInvestors>
            <totalNumberAlreadyInvested>107</totalNumberAlreadyInvested>
        </investors>
        <salesCommissionsFindersFees>
            <salesCommissions>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </salesCommissions>
            <findersFees>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </findersFees>
        </salesCommissionsFindersFees>
        <useOfProceeds>
            <grossProceedsUsed>
                <dollarAmount>0</dollarAmount>
                <isEstimate>true</isEstimate>
            </grossProceedsUsed>
        </useOfProceeds>
        <signatureBlock>
            <authorizedRepresentative>false</authorizedRepresentative>
            <signature>
                <issuerName>MERIDIAN HORIZON FUND L P</issuerName>
                <signatureName>/s/ Laura K. Smith</signatureName>
                <nameOfSigner>Managing Director - Operations of Meridian Capital Partners, Inc.</nameOfSigner>
                <signatureTitle>General Partner of the Issuer</signatureTitle>
                <signatureDate>2010-01-25</signatureDate>
            </signature>
        </signatureBlock>
    </offeringData>
</edgarSubmission>
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-----END PRIVACY-ENHANCED MESSAGE-----