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

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2023-09-12</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001612720</issuerCik>
        <issuerName>NextDecade Corp.</issuerName>
        <issuerTradingSymbol>NEXT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001022078</rptOwnerCik>
            <rptOwnerName>DINAN JAMES G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O YORK CAPITAL MANAGEMENT</rptOwnerStreet1>
            <rptOwnerStreet2>1330 AVENUE OF THE AMERICAS, 20TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10019</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $ 0.0001 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>234877</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By LP, LLC</value>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock, $ 0.0001 par value</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>57119262</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See notes</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Series C Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F2"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F2"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock, $0.0001 par value</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>253931</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See notes</value>
                    <footnoteId id="F3"/>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Shares of Issuer common stock owned by entities controlled by the Reporting Person following pro rata distribution in kind by York Select Investors L.P. to its investors for no additional consideration.</footnote>
        <footnote id="F2">Exercisable by holder before 5 p.m. Central Standard time on March 22, 2024, into an equal number of shares of Common Stock, subject to adjustment as specified in the Series C Warrant Agreement.  Prior to such date, the Issuer can force mandatory exercise based on a weighted average trading price of shares of Common Stock pursuant to the terms of, including adjustments specified in, the Series C Warrant Agreement.</footnote>
        <footnote id="F3">The Reporting Person is the chairman of York Capital Management Global Advisors, LLC (&quot;YGA&quot;) and makes voting and investment decisions on behalf of YGA. YGA is the sole senior managing member of Dinan Management, L.L.C., which is the general partner of each of York Capital Management, L.P., York Credit Opportunities Fund, L.P., York Credit Opportunities Investments Master Fund, L.P., York Multi-Strategy Master Fund, L.P., York Tactical Energy Fund, L.P. and York Tactical Energy Fund PIV-AN, L.P. and may have limited partner or other interests in one or more of the entities described herein.</footnote>
        <footnote id="F4">The Reporting Person disclaims Section 16 beneficial ownership of the shares reported herein except to the extent of his pecuniary interest therein, if any, and the inclusion of the securities in this report shall not be deemed an admission of beneficial ownership of all of the securities for purposes of Section 16 or any other purpose.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ James G. Dinan</signatureName>
        <signatureDate>2023-09-22</signatureDate>
    </ownerSignature>
</ownershipDocument>
