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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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 NI7+0NG1vFHahwn0S+ZYOQ==

<SEC-DOCUMENT>0001179110-10-004337.txt : 20100303
<SEC-HEADER>0001179110-10-004337.hdr.sgml : 20100303
<ACCEPTANCE-DATETIME>20100303162340
ACCESSION NUMBER:		0001179110-10-004337
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100301
FILED AS OF DATE:		20100303
DATE AS OF CHANGE:		20100303

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			LABRANCHE GEORGE M L IV
		CENTRAL INDEX KEY:			0001094446
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-15251
		FILM NUMBER:		10653707

	MAIL ADDRESS:	
		STREET 1:		ONE EXCHANGE PLAZA
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10006-3008

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LABRANCHE & CO INC
		CENTRAL INDEX KEY:			0001089044
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				134064735
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE EXCHANGE PLAZA
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10006-3008
		BUSINESS PHONE:		2128200400

	MAIL ADDRESS:	
		STREET 1:		ONE EXCHANGE PLAZA
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10006-3008
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>FORM 4 -
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-03-01</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001089044</issuerCik>
        <issuerName>LABRANCHE &amp; CO INC</issuerName>
        <issuerTradingSymbol>LAB</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001094446</rptOwnerCik>
            <rptOwnerName>LABRANCHE GEORGE M L IV</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LABRANCHE &amp; CO., INC.</rptOwnerStreet1>
            <rptOwnerStreet2>33 WHITEHALL STREET</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10004</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chairman, CEO &amp; President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>&quot;LAB&quot; Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-03-01</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>400000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.60</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1701094</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>&quot;LAB&quot; Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-03-01</value>
                <footnoteId id="F1"/>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>100000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>4.60</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1300000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Held by Wife</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">The reporting perosn sold 400,000 shares of the Company's common stock pursuant to the Company's tender offer to purchase up to 15 million shares of common stock at a price of $4.60 per share. The tender offer expired on March 1, 2010.  The reporting person's wife sold 100,000 shares of the Company's common stock in the tender offer as well.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>George M.L. LaBranche, IV</signatureName>
        <signatureDate>2010-03-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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