<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0609</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2026-03-23</periodOfReport>

    <issuer>
        <issuerCik>0001778129</issuerCik>
        <issuerName>TerrAscend Corp.</issuerName>
        <issuerTradingSymbol>TSNDF</issuerTradingSymbol>
        <issuerForeignTradingSymbol></issuerForeignTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001903871</rptOwnerCik>
            <rptOwnerName>Ghanem Ziad</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerNonUSAddressFlag>true</rptOwnerNonUSAddressFlag>
            <rptOwnerStreet1>C/O TERRASCEND CORP.</rptOwnerStreet1>
            <rptOwnerStreet2>77 CITY CENTRE DRIVE, SUITE 501</rptOwnerStreet2>
            <rptOwnerCity>MISSISSAUGA</rptOwnerCity>
            <rptOwnerNonUSStateTerritory>ONTARIO</rptOwnerNonUSStateTerritory>
            <rptOwnerCountry>Z4</rptOwnerCountry>
            <rptOwnerZipCode>L5B 1M5</rptOwnerZipCode>
            <rptOwnerStateDescription>CANADA (FEDERAL LEVEL)</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President and CEO</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <aff10b5One>0</aff10b5One>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Shares</value>
            </securityTitle>
            <transactionDate>
                <value>2026-03-23</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>F</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3027</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.70</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1613910</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares were withheld by the Issuer to satisfy the Reporting Person's tax withholding obligations in connection with the settlement of restricted share units pursuant to an equity plan administered by the Issuer.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Ari Unterman, Attorney-in-Fact</signatureName>
        <signatureDate>2026-03-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
