<SEC-DOCUMENT>0001628280-18-003204.txt : 20180314
<SEC-HEADER>0001628280-18-003204.hdr.sgml : 20180314
<ACCEPTANCE-DATETIME>20180314183749
ACCESSION NUMBER:		0001628280-18-003204
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20180312
FILED AS OF DATE:		20180314
DATE AS OF CHANGE:		20180314

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			ALDERMAN WILLIAM H
		CENTRAL INDEX KEY:			0001069713

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-18492
		FILM NUMBER:		18690630

	MAIL ADDRESS:	
		STREET 1:		C/O AVIATION SALES CO
		STREET 2:		6905 N.W. 25TH ST
		CITY:			MIAMI
		STATE:			FL
		ZIP:			33122

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:		3565 PIEDMONT ROAD, NE
		STREET 2:		BUILDING 3, SUITE 700
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30305
		BUSINESS PHONE:		8669521647

	MAIL ADDRESS:	
		STREET 1:		3565 PIEDMONT ROAD, NE
		STREET 2:		BUILDING 3, SUITE 700
		CITY:			ATLANTA
		STATE:			GA
		ZIP:			30305

	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
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wf-form4_152106705594974.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-03-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001069713</rptOwnerCik>
            <rptOwnerName>ALDERMAN WILLIAM H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>35 WARRINGTON ROUND</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>DANBURY</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06810</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>
            </securityTitle>
            <transactionDate>
                <value>2018-03-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>7150</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>5.70</value>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>75000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Notes: The price reported in Column 4 of Table 1 is a weighted average price.  The shares were sold in multiple transactions at prices ranging from $5.70 to $5.73, inclusive.  The reporting person undertakes to provide to the corporation, any security holder of the corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote 1 to this form 4.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Michael A. Goldstein, as attorney-in-fact for William H. Alderman</signatureName>
        <signatureDate>2018-03-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
