<SEC-DOCUMENT>0000785557-13-000018.txt : 20131113
<SEC-HEADER>0000785557-13-000018.hdr.sgml : 20131113
<ACCEPTANCE-DATETIME>20131113161048
ACCESSION NUMBER:		0000785557-13-000018
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20131108
FILED AS OF DATE:		20131113
DATE AS OF CHANGE:		20131113

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			DLH Holdings Corp.
		CENTRAL INDEX KEY:			0000785557
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-HELP SUPPLY SERVICES [7363]
		IRS NUMBER:				221899798
		STATE OF INCORPORATION:			NJ
		FISCAL YEAR END:			0930

	BUSINESS ADDRESS:	
		STREET 1:		1776 PEACHTREE STREET, N.W.
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309
		BUSINESS PHONE:		8669521647

	MAIL ADDRESS:	
		STREET 1:		1776 PEACHTREE STREET, N.W.
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30309

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TEAMSTAFF INC
		DATE OF NAME CHANGE:	19990216

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	DIGITAL SOLUTIONS INC
		DATE OF NAME CHANGE:	19920703

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Armstrong John F.
		CENTRAL INDEX KEY:			0001506617

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-18492
		FILM NUMBER:		131214719

	MAIL ADDRESS:	
		STREET 1:		TEAMSTAFF, INC.
		STREET 2:		1 EXECUTIVE DRIVE
		CITY:			SOMERSET
		STATE:			NJ
		ZIP:			08873
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_138437703842597.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2013-11-08</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000785557</issuerCik>
        <issuerName>DLH Holdings Corp.</issuerName>
        <issuerTradingSymbol>DLHC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001506617</rptOwnerCik>
            <rptOwnerName>Armstrong John F.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>DLH HOLDINGS CORP</rptOwnerStreet1>
            <rptOwnerStreet2>1776 PEACHTREE STREET, N.W.</rptOwnerStreet2>
            <rptOwnerCity>ATLANTA</rptOwnerCity>
            <rptOwnerState>GA</rptOwnerState>
            <rptOwnerZipCode>30309</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Executive Vice President</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Employee Stock Option</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>1.395</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2013-11-08</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>75000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2023-11-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>75000.0</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This is an award of performance-based stock options under the Company's 2006 Long Term Incentive Plan. The options granted will vest and become exercisable upon the satisfaction of certain stock price and other financial performance conditions.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ John F. Armstrong</signatureName>
        <signatureDate>2013-11-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
