<SEC-DOCUMENT>0001664211-25-000008.txt : 20250516
<SEC-HEADER>0001664211-25-000008.hdr.sgml : 20250516
<ACCEPTANCE-DATETIME>20250516174133
ACCESSION NUMBER:		0001664211-25-000008
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250514
FILED AS OF DATE:		20250516
DATE AS OF CHANGE:		20250516

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Durr Julie J
		CENTRAL INDEX KEY:			0001664207
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15087
		FILM NUMBER:		25960828

	MAIL ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Gerdin Ann S
		CENTRAL INDEX KEY:			0001483283
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15087
		FILM NUMBER:		25960829

	MAIL ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Janssen Angela K
		CENTRAL INDEX KEY:			0001664284
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15087
		FILM NUMBER:		25960830

	MAIL ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Ann S. Gerdin Revocable Trust
		CENTRAL INDEX KEY:			0001664211
		ORGANIZATION NAME:           	
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-15087
		FILM NUMBER:		25960831

	BUSINESS ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317
		BUSINESS PHONE:		319-645-7060

	MAIL ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			HEARTLAND EXPRESS INC
		CENTRAL INDEX KEY:			0000799233
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
		ORGANIZATION NAME:           	01 Energy & Transportation
		EIN:				930926999
		STATE OF INCORPORATION:			NV
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317
		BUSINESS PHONE:		3196457060

	MAIL ADDRESS:	
		STREET 1:		901 HEARTLAND WAY
		CITY:			NORTH LIBERTY
		STATE:			IA
		ZIP:			52317
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1747431683.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
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<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-05-14</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000799233</issuerCik>
        <issuerName>HEARTLAND EXPRESS INC</issuerName>
        <issuerTradingSymbol>HTLD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001664211</rptOwnerCik>
            <rptOwnerName>Ann S. Gerdin Revocable Trust</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>901 HEARTLAND WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NORTH LIBERTY</rptOwnerCity>
            <rptOwnerState>IA</rptOwnerState>
            <rptOwnerZipCode>52317</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Co-Trustee of 10% Owner</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001664284</rptOwnerCik>
            <rptOwnerName>Janssen Angela K</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>901 HEARTLAND WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NORTH LIBERTY</rptOwnerCity>
            <rptOwnerState>IA</rptOwnerState>
            <rptOwnerZipCode>52317</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Co-Trustee of 10% Owner</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001483283</rptOwnerCik>
            <rptOwnerName>Gerdin Ann S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>901 HEARTLAND WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NORTH LIBERTY</rptOwnerCity>
            <rptOwnerState>IA</rptOwnerState>
            <rptOwnerZipCode>52317</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001664207</rptOwnerCik>
            <rptOwnerName>Durr Julie J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>901 HEARTLAND WAY</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NORTH LIBERTY</rptOwnerCity>
            <rptOwnerState>IA</rptOwnerState>
            <rptOwnerZipCode>52317</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>1</isOther>
            <officerTitle></officerTitle>
            <otherText>Co-Trustee of 10% Owner</otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-05-14</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>G</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5525544</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>14465076</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1214500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee of Trust</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1700249</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee of Trust</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>8813</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By Spouse</value>
                    <footnoteId id="F5"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4283975</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Co-Trustee of Trust</value>
                    <footnoteId id="F6"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>38424</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee of Trusts</value>
                    <footnoteId id="F7"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>38424</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Trustee of Trusts</value>
                    <footnoteId id="F8"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5003805</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Co-Trustee of Trust</value>
                    <footnoteId id="F9"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1936276</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Co-General Partner of Partnership</value>
                    <footnoteId id="F10"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Annuity distributions made from grantor retained annuity trusts (GRATs) created for the benefit of Ann Gerdin.</footnote>
        <footnote id="F2">Mrs. Durr, Mrs. Janssen, and Mrs. Gerdin are among the co-trustees of the Ann S. Gerdin Revocable Trust.</footnote>
        <footnote id="F3">Julie Durr is the trustee of the Julie J. Durr Revocable Trust.</footnote>
        <footnote id="F4">Angela Janssen is the trustee of the Angela K. Janssen Revocable Trust.</footnote>
        <footnote id="F5">Mrs. Janssen's husband owns these shares.</footnote>
        <footnote id="F6">Mrs. Durr and Mrs. Janssen are among the co-trustees of the 2009 Gerdin Heartland Trust. As co-trustees, Mrs. Durr and Mrs. Janssen disclaim beneficial ownership with respect to this trust.</footnote>
        <footnote id="F7">Mrs. Janssen is the trustee of trusts created for the benefit of her children.</footnote>
        <footnote id="F8">Mrs. Durr is the trustee of trusts created for the benefit of her children.</footnote>
        <footnote id="F9">Mrs. Durr and Mrs. Janssen are among the co-trustees of the 2007 Gerdin Heartland Trust. As co-trustees, Mrs. Durr and Mrs. Janssen disclaim beneficial ownership with respect to this trust.</footnote>
        <footnote id="F10">The Ann S. Gerdin Revocable Trust, Mrs. Durr, and Mrs. Janssen are among the co-general partners of Gerdin Family Investments LP. Beneficial ownership is disclaimed except to the extent of each such reporting person's percentage ownership of general and limited partner shares in the partnership.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/Michael Gerdin, Co-Trustee of the Ann S. Gerdin Revocable Trust, by Chris Strain, pursuant to power of attorney previously filed</signatureName>
        <signatureDate>2025-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/Angela K. Janssen, by Chris Strain, pursuant to power of attorney previously filed</signatureName>
        <signatureDate>2025-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/Julie J. Durr, by Chris Strain, pursuant to power of attorney previously filed</signatureName>
        <signatureDate>2025-05-16</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Ann S. Gerdin, by Chris Strain, pursuant to power of attorney previously filed</signatureName>
        <signatureDate>2025-05-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
