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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>0001179110-10-005534.txt : 20100317
<SEC-HEADER>0001179110-10-005534.hdr.sgml : 20100317
<ACCEPTANCE-DATETIME>20100317175257
ACCESSION NUMBER:		0001179110-10-005534
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100315
FILED AS OF DATE:		20100317
DATE AS OF CHANGE:		20100317

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LPL Investment Holdings Inc.
		CENTRAL INDEX KEY:			0001397911
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY & COMMODITY BROKERS, DEALERS, EXCHANGES & SERVICES [6200]
		IRS NUMBER:				203717839
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		ONE BEACON STREET , FLOOR 22
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02108
		BUSINESS PHONE:		617 423 3644

	MAIL ADDRESS:	
		STREET 1:		ONE BEACON STREET , FLOOR 22
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02108

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			STIEFLER JEFFREY E
		CENTRAL INDEX KEY:			0001227965

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-52609
		FILM NUMBER:		10689734

	MAIL ADDRESS:	
		STREET 1:		C/O INTUIT INC.
		STREET 2:		2700 COAST AVENUE
		CITY:			MOUNTAIN VIEW
		STATE:			CA
		ZIP:			94043
</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>2010-03-15</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001397911</issuerCik>
        <issuerName>LPL Investment Holdings Inc.</issuerName>
        <issuerTradingSymbol>NONE</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001227965</rptOwnerCik>
            <rptOwnerName>STIEFLER JEFFREY E</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O LPL INVESTMENT HOLDINGS INC.</rptOwnerStreet1>
            <rptOwnerStreet2>ONE BEACON STREET, 22ND FLOOR</rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02108</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <transactionDate>
                <value>2010-03-15</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>2136</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>74078</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Stiefler Trust U/T/D 5/31/2007</value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">These shares represent restricted stock that was granted under the issuer's LPL Investment Holdings Inc. Director Restricted Stock Plan.  This restricted stock shall be fully vested on the second anniversary of the transaction date.</footnote>
    </footnotes>

    <remarks>Chad D. Perry is signing on behalf of Mr. Stiefler pursuant to a Power of Attorney dated June 29, 2007, which was previously filed with the SEC.</remarks>

    <ownerSignature>
        <signatureName>/s/Chad D. Perry, signing on behalf of Jeffrey E. Stiefler</signatureName>
        <signatureDate>2010-03-17</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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