    <SEC-DOCUMENT>0001628280-24-018208-index.html : 20240425
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    <ACCEPTANCE-DATETIME>20240425163114
    ACCESSION NUMBER:		0001628280-24-018208
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		5
    CONFORMED PERIOD OF REPORT:	20240425
    FILED AS OF DATE:		20240425
    DATE AS OF CHANGE:		20240425

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			NextDecade Corp.
    		CENTRAL INDEX KEY:			0001612720
    		STANDARD INDUSTRIAL CLASSIFICATION:	NATURAL GAS TRANSMISSION & DISTRIBUTION [4923]
    		ORGANIZATION NAME:           	01 Energy & Transportation
    		IRS NUMBER:				465723951
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-36842
    		FILM NUMBER:		24876892

    	BUSINESS ADDRESS:
    		STREET 1:		1000 LOUISIANA STREET
    		STREET 2:		SUITE 3900
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77002
    		BUSINESS PHONE:		7135741880

    	MAIL ADDRESS:
    		STREET 1:		1000 LOUISIANA STREET
    		STREET 2:		SUITE 3900
    		CITY:			HOUSTON
    		STATE:			TX
    		ZIP:			77002

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Harmony Merger Corp.
    		DATE OF NAME CHANGE:	20140703
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
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    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: proxyforfiling.htm

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    <SEQUENCE>2
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    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>chart-f569ec24a5a542ab93b.jpg
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>nextpc42224v3001.jpg
    <TEXT>
    Document 4 - file: nextpc42224v3001.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>nextpc42224v3002.jpg
    <TEXT>
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    </SEC-DOCUMENT>