<SEC-DOCUMENT>0001759631-25-000008.txt : 20250213
<SEC-HEADER>0001759631-25-000008.hdr.sgml : 20250213
<ACCEPTANCE-DATETIME>20250213192048
ACCESSION NUMBER:		0001759631-25-000008
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20250213
FILED AS OF DATE:		20250213
DATE AS OF CHANGE:		20250213

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Panzer Jon
		CENTRAL INDEX KEY:			0001946212
		ORGANIZATION NAME:           	

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-38823
		FILM NUMBER:		25622353

	MAIL ADDRESS:	
		STREET 1:		C/O HYLIION HOLDING CORP.
		STREET 2:		1202 BMC DRIVE, SUITE 100
		CITY:			CEDAR PARK
		STATE:			TX
		ZIP:			78613

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Hyliion Holdings Corp.
		CENTRAL INDEX KEY:			0001759631
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCK & BUS BODIES [3713]
		ORGANIZATION NAME:           	04 Manufacturing
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		1202 BMC DRIVE, SUITE 100
		CITY:			CEDAR PARK
		STATE:			TX
		ZIP:			78613
		BUSINESS PHONE:		(833) 495-4466

	MAIL ADDRESS:	
		STREET 1:		1202 BMC DRIVE, SUITE 100
		CITY:			CEDAR PARK
		STATE:			TX
		ZIP:			78613

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	Tortoise Acquisition Corp.
		DATE OF NAME CHANGE:	20181120
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>wk-form4_1739492441.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0508</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2025-02-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001759631</issuerCik>
        <issuerName>Hyliion Holdings Corp.</issuerName>
        <issuerTradingSymbol>HYLN</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001946212</rptOwnerCik>
            <rptOwnerName>Panzer Jon</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O HYLIION HOLDING CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>1202 BMC DRIVE, SUITE 100</rptOwnerStreet2>
            <rptOwnerCity>CEDAR PARK</rptOwnerCity>
            <rptOwnerState>TX</rptOwnerState>
            <rptOwnerZipCode>78613</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Financial Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2025-02-13</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>23767</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.14</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>795387</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Shares withheld for the payment of a tax liability related to the vesting and distribution of restricted stock units.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Jon Panzer</signatureName>
        <signatureDate>2025-02-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>