Document

S-3ASR 1 next-sx3.htm S-3ASR Document

As filed with the Securities and Exchange Commission on May 13, 2026

No. 333-

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM S-3
REGISTRATION STATEMENT UNDER
THE SECURITIES ACT OF 1933

NextDecade Corporation

(Exact name of registrant as specified in its charter)


Delaware						46-5723951
(State or other jurisdiction of incorporation or organization)						(I.R.S. Employer Identification Number)
1000 Louisiana Street, Suite 3300 Houston, Texas 77002 (713) 574-1880
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)
Vera de Gyarfas, General Counsel NextDecade Corporation 1000 Louisiana Street, Suite 3300 Houston, Texas 77002 (713) 574-1880
(Name, address, including zip code, and telephone number, including area code, of agent for service)
Copies to: Ryan J. Maierson Latham & Watkins LLP 811 Main Street, Suite 3700 Houston, Texas 77002 (713) 546-5400
Approximate date of commencement of proposed sale to the public: From time to time after this registration statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box. ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☒

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.


Large accelerated filer ☒	Accelerated filer ☐	Non-accelerated filer ☐	Smaller reporting company ☐
			Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

US-DOCS\146694606.4

Prospectus

NextDecade Corporation

19,730,742 Shares of Common Stock for Sale by the Selling Stockholders

This prospectus relates to the offer and sale from time to time by the selling stockholders identified in this prospectus or a supplement hereto of 19,730,742 shares of common stock, par value $0.0001 per share (the “Common Stock”), of NextDecade Corporation (the “Company”).

The 19,730,742 shares of Common Stock consist of (i) 9,204,426 shares (the “Warrant Shares”) issuable upon exercise of warrants issued on December 31, 2024 and on May 14, 2025 (the “Warrants”) to the selling stockholders under that certain Credit Agreement, dated as of December 31, 2024, as amended and restated on November 17, 2025 (as further amended, supplemented or otherwise modified from time to time, the “A&R Corporate Credit Agreement”), by and among the Company, Rio Grande LNG Super Holdings, LLC, APSC II HoldCo II, L.P., as administrative agent and collateral agent, and the lenders party thereto and (ii) 10,526,316 shares (the “Exchange Shares”) issuable upon exchange of Series A term loans (the “Series A Loans”) by the selling stockholders pursuant to the A&R Corporate Credit Agreement. We are registering the offer and sale of the shares of Common Stock to satisfy registration rights we have granted pursuant to that certain Second Amended and Restated Registration Rights Agreement, dated as of November 17, 2025 (the “Registration Rights Agreement”), by and among the Company and the selling stockholders named herein.

We have agreed to bear all of the expenses incurred in connection with the registration of the sale of shares of Common Stock covered by this prospectus other than those expenses related to transfer taxes, underwriting or brokerage commissions or discounts associated with the sale of shares of Common Stock pursuant to this prospectus. We are not selling any shares of Common Stock under this prospectus and will not receive any proceeds from the sale of shares of Common Stock by the selling stockholders. The shares of Common Stock to which this prospectus relates may be offered and sold from time to time directly by the selling stockholders or alternatively through underwriters, broker-dealers or agents. The selling stockholders will determine at what price they may sell the shares of Common Stock offered by this prospectus, and such sales may be made at fixed prices, at prevailing market prices at the time of the sale, at varying prices determined at the time of sale, or at negotiated prices. For additional information on the methods of sale that may be used by the selling stockholders, see the section titled “Plan of Distribution.”

We may amend or supplement this prospectus from time to time by filing amendments or supplements as required. You should carefully read this prospectus and any prospectus supplement or amendment before you invest. You also should read the documents we have referred you to under the headings “Where You Can Find More Information” and “Incorporation of Certain Information by Reference” of this prospectus for information about us and our financial statements.

The Common Stock is listed on the Nasdaq Capital Market under the symbol “NEXT.” On May 12, 2026, the last reported sale price of the Common Stock on the Nasdaq Capital Market was $8.50 per share.

Investing in shares of our Common Stock involves risks. See the section entitled “Risk Factors” beginning on page 8 of this prospectus. You should carefully read and consider these risk factors before you invest in shares of our Common Stock.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The date of this prospectus is May 13, 2026.

TABLE OF CONTENTS

Page


ABOUT THIS PROSPECTUS			2
WHERE YOU CAN FIND MORE INFORMATION			2
INCORPORATION OF CERTAIN INFORMATION BY REFERENCE			2
CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS			4
PROSPECTUS SUMMARY			7
THE OFFERING			8
RISK FACTORS			8
USE OF PROCEEDS			8
SELLING STOCKHOLDERS			9
PLAN OF DISTRIBUTION			11
DESCRIPTION OF COMMON STOCK TO BE REGISTERED			13
LEGAL MATTERS			15
EXPERTS			15

This prospectus is part of a registration statement that we have filed with the Securities and Exchange Commission (the “SEC”) pursuant to which the selling stockholder named herein may, from time to time, offer and sell or otherwise dispose of shares of Common Stock covered by this prospectus. You should not assume that the information contained in this prospectus is accurate on any date subsequent to the date set forth on the front cover of this prospectus or that any information we have incorporated by reference is correct on any date subsequent to the date of the document incorporated by reference, even though this prospectus is delivered or the shares of Common Stock are sold or otherwise disposed of on a later date. Neither the delivery of this prospectus nor any sale or distribution of securities in accordance with this prospectus shall, under any circumstances, imply that there has been no change in our affairs since the date of this prospectus. The prospectus will be updated, and updated prospectuses made available for delivery, to the extent required by the federal securities laws. It is important for you to read and consider all information contained in this prospectus, including the documents incorporated by reference herein, in making your investment decision. You should also read and consider the information in the documents to which we have referred you under the caption “Where You Can Find More Information” in this prospectus.

We have not authorized anyone to provide any information or to make any representations other than those contained in this prospectus or in any free writing prospectuses we have prepared. We take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. We are not making, and the selling stockholders may not make, an offer to sell these securities in any jurisdiction where an offer or sale is not permitted.

This prospectus contains forward-looking statements that are subject to a number of risks and uncertainties, many of which are beyond our control. Please read “Risk Factors” and “Cautionary Note Regarding Forward-Looking Statements.”

ABOUT THIS PROSPECTUS

This prospectus is part of an “automatic shelf” registration statement that we filed with the SEC as a “well-known seasoned issuer” (as defined in Rule 405 of the Securities Act of 1933, as amended (the “Securities Act”)), using a “shelf” registration process. Using this process, the selling stockholders may offer the securities described in this prospectus in one or more offerings. This prospectus provides you with a general description of us and the securities that may be offered by the selling stockholders.

In addition, a prospectus supplement may also add, update or change the information contained or incorporated in this prospectus. Any prospectus supplement will supersede this prospectus to the extent it contains information that is different from, or that conflicts with, the information contained or incorporated in this prospectus. The registration statement we filed with the SEC includes exhibits that provide more detail of the matters discussed in this prospectus. You should read and consider all information contained in this prospectus and the related registration statement and exhibits filed with the SEC and any accompanying prospectus supplement in making your investment decision. You should also read and consider the information contained in the documents identified under the headings “Where You Can Find More Information” and “Incorporation of Certain Information by Reference” in this prospectus.

WHERE YOU CAN FIND MORE INFORMATION

The registration statement that we have filed with the SEC registers the securities offered by this prospectus under the Securities Act. The registration statement, including the exhibits to it, contains additional relevant information about us. The rules and regulations of the SEC allow us to omit some information included in the registration statement from this prospectus.

The Company files reports, proxy statements and other information with the SEC as required by the Securities Exchange Act of 1934, as amended (the “Exchange Act”). You can read the Company’s filings with the SEC, including this prospectus, over the internet at the SEC’s website at http://www.sec.gov.

We also make available free of charge on the Investors section of our website, http://www.next-decade.com, all materials that we file electronically with the SEC, including our Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, Section 16 reports and amendments to those reports as soon as reasonably practicable after such materials are electronically filed with, or furnished to, the SEC. Information contained on our website or any other website is not incorporated by reference into, and does not constitute a part of, this prospectus.

INCORPORATION OF CERTAIN INFORMATION BY REFERENCE

The SEC allows us to “incorporate by reference” information into this prospectus, which means that we can disclose important information about us by referring you to another document filed separately with the SEC. These other documents contain important information about us, our financial condition and our results of operations. The information incorporated by reference is considered to be a part of this prospectus. This prospectus incorporates by reference the documents and reports listed below (other than portions of these documents that are either (i) described in paragraph (e) of Item 201 of Regulation S-K or paragraphs (d)(1)-(3) or (e)(5) of Item 407 of Regulation S-K promulgated by the SEC or (ii) deemed to have been furnished and not filed in accordance with SEC rules, including Current Reports on Form 8-K furnished under Item 2.02 or Item 7.01 (including any financial statements or exhibits relating thereto furnished pursuant to Item 9.01)), unless otherwise indicated therein:

•Our Annual Report on Form 10-K for the year ended December 31, 2025 filed with the SEC on March 2, 2026;

•Our Quarterly Report on Form 10-Q for the quarter ended March 31, 2026 filed with the SEC on May 1, 2026;

•Our Current Report on Form 8-K as filed with the SEC on April 15, 2026;

•Our Definitive Proxy Statement on Schedule 14A filed with the SEC on April 23, 2026; and

•The description of Common Stock included in the Registration Statement on Form 8-A filed with the SEC on February 9, 2015 (File No. 001-36842), as amended by the Registration Statement on Form 8-A/A filed with the SEC on March 18, 2015, including any amendment or report filed for the purpose of updating such description.

We also incorporate by reference the information contained in all other documents we file with the SEC pursuant to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act (other than portions of these documents that are either (i) described in paragraph (e) of Item 201 of Regulation S-K or paragraphs (d)(1)-(3) or (e)(5) of Item 407 of Regulation S-K promulgated by the SEC or (ii) deemed to have been furnished and not filed in accordance with SEC rules, including Current Reports on Form 8-K furnished under Item 2.02 or Item 7.01 (including any financial statements or exhibits relating thereto furnished pursuant to Item 9.01, unless otherwise indicated therein)) whether filed after the date of the initial filing of the registration statement of which this prospectus forms a part and prior to effectiveness of such registration statement or after the date of this prospectus and prior to the termination of the offering of all securities covered hereby. The information contained in any such document will be considered part of this prospectus from the date the document is filed with the SEC.

You may obtain any of the documents incorporated by reference in this prospectus from the SEC through the SEC’s website at the address provided above. You may also request and we will provide, free of charge, a copy of any document incorporated by reference in this prospectus (excluding exhibits to such document unless an exhibit is specifically incorporated by reference in the document) by visiting our internet website at http://www.next-decade.com or by writing or calling us at the following address and telephone number:

NextDecade Corporation

Attention: Corporate Secretary

1000 Louisiana Street, Suite 3300

Houston, Texas 77002

(713) 574-1880

You should rely only on the information contained in, or incorporated by reference into, this prospectus, in any accompanying prospectus supplement or in any free writing prospectus filed by us with the SEC. We have not authorized anyone to provide you with different or additional information. We are not offering to sell or soliciting any offer to buy any securities in any jurisdiction where the offer or sale is not permitted. You should not assume that the information in this prospectus or in any document incorporated by reference is accurate as of any date other than the date on the front cover of the applicable document.

CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS

This prospectus and any accompanying prospectus supplement and the documents incorporated herein or therein by reference contains certain statements that are, or may be deemed to be, “forward-looking statements” within the meaning of Section 27A of the Securities Act and Section 21E of the Exchange Act. All statements other than statements of historical fact contained in this prospectus, including statements regarding our future results of operations and financial position, strategy and plans, and our expectations for future operations and economic performance, are forward-looking statements. The words “anticipate,” “contemplate,” “estimate,” “expect,” “project,” “plan,” “intend,” “believe,” “seek,” “may,” “might,” “will,” “would,” “could,” “should,” “can have,” “likely,” “continue,” “design,” “assume,” “budget,” “forecast,” “target” and other words and terms of similar expressions, are intended to identify forward-looking statements.

We have based these forward-looking statements on assumptions and analysis made by us in light of our current expectations, perceptions of historical trends, current conditions and projections about future events and trends that we believe may affect our financial condition, results of operations, strategy, short-term and long-term business operations and objectives and financial needs.

Although we believe that the expectations reflected in our forward-looking statements are reasonable, actual results could differ from those expressed in our forward-looking statements. Our future financial position and results of operations, as well as any forward-looking statements are subject to change and inherent risks and uncertainties, including those described in the section titled “Risk Factors” herein and in our most recent Annual Report on Form 10-K and any subsequently filed Quarterly Reports on Form 10-Q or Current Reports on Form 8-K. You should consider our forward-looking statements in light of a number of factors that may cause actual results to vary from our forward-looking statements including, but not limited to:

•our progress in the development of our natural gas liquefaction and liquefied natural gas (“LNG”) export project and any carbon capture and storage projects (“CCS projects”) we may develop and the timing of that progress;

•the timing and cost of the development, construction and operation of the first five liquefaction trains and related common facilities of the multi-plant integrated natural gas liquefaction and LNG export facility located at the Port of Brownsville in southern Texas;

•the availability and frequency of cash distributions available to us from the joint ventures, which own Phase 1, Train 4 and Train 5 of the Rio Grande LNG Facility;

•the timing and cost of the development of subsequent liquefaction trains at the Rio Grande LNG Facility;

•the ability to generate sufficient cash flow to satisfy our and our subsidiaries’ significant debt service obligations or to refinance such obligations ahead of their maturity;

•restrictions imposed by our or our subsidiaries’ debt agreements that limit flexibility in operating our business;

•increases in interest rates increasing the cost of servicing indebtedness;

•our reliance on third parties to successfully complete the Rio Grande LNG Facility, any CCS projects we develop, and related pipelines and other infrastructure;

•our ability to develop and implement CCS projects;

•our ability to secure additional debt and equity financing in the future, including any refinancing of outstanding indebtedness, on commercially acceptable terms;

•the accuracy of estimated costs for the Rio Grande LNG Facility and any CCS projects;

•our ability to achieve operational characteristics of the Rio Grande LNG Facility and any CCS projects, when completed, including amounts of liquefaction capacities and amount of CO2 captured and stored, and any differences in such operational characteristics from our expectations;

•the development risks, operational hazards and regulatory approvals applicable to the Rio Grande LNG Facility, our LNG, and any CCS project development, construction and operation activities and those of our third-party contractors and counterparties;

•the ability to obtain or maintain governmental approvals to construct or operate the Rio Grande LNG Facility and any CCS projects;

•technological innovation which may lessen our anticipated competitive advantage or demand for our offerings;

•the availability of LNG vessels worldwide;

•changes in legislation and regulations relating to the LNG and carbon capture industries, including environmental laws and regulations that impose significant compliance costs and liabilities;

•scope of implementation of carbon pricing regimes aimed at reducing greenhouse gas emissions;

•global development and maturation of emissions reduction credit markets;

•adverse changes to existing or proposed carbon tax incentive regimes;

•global pandemics, the Russia-Ukraine conflict, the conflict in the Middle East, other sources of volatility in the energy markets and their impact on our business and operating results, including any disruptions in our operations or development of the Rio Grande LNG Facility and the health and safety of our employees, and on our customers, the global economy and the demand for LNG or carbon capture;

•risks related to doing business in and having counterparties in foreign countries, including as a result of tariffs;

•our ability to maintain the listing of our securities on the Nasdaq Capital Market or another securities exchange or quotation medium;

•changes adversely affecting the businesses in which we are engaged;

•management of growth;

•general economic conditions, including inflation and rising interest rates;

•our ability to generate cash; and

•the result of future financing efforts and applications for customary tax incentives.

Should one or more of the foregoing risks or uncertainties materialize in a way that negatively impacts us, or should the assumptions underlying our forward-looking statements prove incorrect, our actual results may vary materially from those anticipated in our forward-looking statements, and our business, financial condition and results of operations could be materially and adversely affected.

Please read “Risk Factors” contained in this prospectus for a more complete discussion of the risks and uncertainties mentioned above and for a discussion of other risks and uncertainties. All forward-looking statements attributable to us are expressly qualified in their entirety by these cautionary statements as well as others made in our most recent Annual Report on Form 10-K as well as other filings we have made and will make with the SEC and our

public communications. You should evaluate all forward-looking statements made by us in the context of these risks and uncertainties.

The forward-looking statements contained in this prospectus are made as of the date of this prospectus or, in the case of any accompanying prospectus supplement or documents incorporated by reference, the date of any such document. You should not rely upon forward-looking statements as predictions of future events. In addition, neither we nor any other person assumes responsibility for the accuracy and completeness of any of these forward-looking statements. Except as required by applicable law, we do not undertake any obligation to publicly correct or update any forward-looking statement.

PROSPECTUS SUMMARY

The following summary highlights information contained elsewhere or incorporated by reference into this prospectus. It may not contain all the information that may be important to you. You should read this entire prospectus, including all documents incorporated by reference, carefully, especially the “Risk Factors” section beginning on page 8 of this prospectus and incorporated by reference from our Annual Report on Form 10-K for the year ended December 31, 2025 and any subsequently filed Quarterly Reports on Form 10-Q, and our financial statements and related notes incorporated by reference in this prospectus before making an investment decision with respect to our securities. Please see the sections titled “Where You Can Find More Information” and “Incorporation of Certain Information by Reference” in this prospectus.

Our Company

We were incorporated in Delaware on May 21, 2014, and were formed for the purpose of acquiring, through a merger, share exchange, asset acquisition, stock purchase, recapitalization, reorganization, or other similar business combination, one or more businesses or entities. On July 24, 2017, one of our subsidiaries merged with and into NextDecade LLC, an LNG development company founded in 2010 to develop LNG export projects and associated pipelines. Prior to the merger with NextDecade LLC, we had no operations and our assets consisted of cash proceeds received in connection with our initial public offering.

We are a Houston-based energy company primarily engaged in construction and development activities related to the liquefaction of natural gas and sale of LNG. We are constructing and developing a natural gas liquefaction and export facility located in the Rio Grande Valley near Brownsville, Texas (the “Rio Grande LNG Facility”). The first five liquefaction trains and related infrastructure at the Rio Grande LNG Facility are currently under construction. We are also developing and advancing the permitting process for expansion Trains 6 through 8 and exploring a potential CCS project at the Rio Grande LNG Facility.

We are focused on constructing and operating the Rio Grande LNG Facility safely, efficiently, on schedule, and on budget. We seek to deliver secure, affordable, and cleaner energy through the development and operation of liquefaction capacity at the Rio Grande LNG Facility. Our Common Stock trades on the Nasdaq Capital Market under the symbol “NEXT.”

Corporate Information

The mailing address of our principal executive office is 1000 Louisiana Street, Suite 3300, Houston, Texas 77002 and our telephone number is (713) 574-1880. We maintain a website at www.next-decade.com. The information contained on our website is not intended to form a part of, or be incorporated by reference into, this prospectus. For a description of our business, financial condition, results of operations and other important information regarding us, we refer you to our filings with the SEC incorporated by reference into this prospectus. For instructions on how to find copies of these documents, see “Where You Can Find More Information.”

THE OFFERING


Common Stock offered by the selling stockholders			Up to 19,730,742 shares of Common Stock.
Use of proceeds			We are not selling any shares of Common Stock under this prospectus and will not receive any of the proceeds from the sale of shares of Common Stock by the selling stockholder.
Risk factors			An investment in shares of our Common Stock involves a high degree of risk. Please refer to the sections titled “Risk Factors,” “Cautionary Note Regarding Forward-Looking Statements” and other information included or incorporated by reference in this prospectus for a discussion of factors you should carefully consider before investing in shares of our Common Stock.
Nasdaq Capital Market symbol			NEXT

RISK FACTORS

An investment in our Common Stock involves a high degree of risk. Before you decide to invest in shares of Common Stock, you should consider carefully all of the information in this prospectus and the documents incorporated by reference herein and, in particular, the risks described below and the Risk Factors included in any prospectus supplement or amendment, our Annual Report on Form 10-K for the year ended December 31, 2025 and any subsequently filed Quarterly Reports on Form 10-Q and our other filings with the SEC that are incorporated by reference into this prospectus. The risks described in this prospectus or in any document incorporated by reference are not the only ones we face. There may be other unknown or unpredictable economic, business, competitive, regulatory or other factors that could have material adverse effects on our business, prospects, financial condition and results of operations. In any such case, the trading price of shares of Common Stock could decline materially and you could lose all or part of your investment. Past financial performance may not be a reliable indicator of future performance and historical trends should not be used to anticipate results or trends in future periods.

USE OF PROCEEDS

All of the shares of Common Stock covered by this prospectus are being sold by the selling stockholders. See the section titled “Selling Stockholders.” All proceeds from the sale of shares of Common Stock pursuant to this prospectus will be for the account of the selling stockholders. We are not selling any shares of Common Stock under this prospectus and will not receive any of the proceeds from the sale of shares of Common Stock by the selling stockholders. We will bear all of the expenses incurred in connection with the registration of the shares of Common Stock covered by this prospectus other than those expenses related to transfer taxes, underwriting or brokerage commissions or discounts associated with the sale of shares of Common Stock pursuant to this prospectus.

SELLING STOCKHOLDERS

This prospectus covers the offering for resale of 19,730,742 shares of Common Stock that may be offered and sold from time to time under this prospectus by the selling stockholders identified below or their permitted transferees, successors or assigns, in each case, subject to any appropriate adjustment as a result of any stock dividend, stock split or distribution, or in connection with a combination of shares. The possible resale of our Common Stock by the selling stockholders identified in the table below relates to (i) 9,204,426 Warrant Shares issuable upon exercise of the Warrants and (ii) 10,526,316 Exchange Shares issuable upon exchange of Series A Loans pursuant to the A&R Corporate Credit Agreement. These shares of Common Stock are being registered pursuant to the registration rights we granted to such selling stockholders in the Registration Rights Agreement.

We have prepared the below table and the related notes as of May 8, 2026 based on publicly available information, information supplied by the Company’s transfer agent and information previously supplied to us by the selling stockholders. We believe, based on information supplied by the selling stockholders, that except as may otherwise be indicated in the footnotes to the table below, each selling stockholder and its affiliates identified herein have sole voting and dispositive power with respect to the shares of Common Stock reported as beneficially owned by them. Because the selling stockholders identified in the table may sell some or all of the shares of Common Stock owned by them which are included in this prospectus, no estimate can be given as to the number of the shares of Common Stock available for resale hereby that will be held by the selling stockholders upon termination of this offering. In addition, the selling stockholders may have sold, transferred or otherwise disposed of, or may sell, transfer or otherwise dispose of, at any time and from time to time, if applicable, the shares of Common Stock they hold in transactions exempt from the registration requirements of the Securities Act after the date on which the selling stockholders provided the information set forth on the table below. We have, therefore, assumed for the purposes of the following table, that the selling stockholders will sell all of the shares of Common Stock beneficially owned by them that are covered by this prospectus. The selling stockholders are not obligated to sell any of the shares of Common Stock offered by this prospectus. The percent of beneficial ownership for the selling stockholders is based on 264,992,987 shares of Common Stock outstanding as of May 8, 2026.


	Shares of Common Stock Beneficially Owned Prior to the Offering**		Shares of Common Stock Offered Hereby	Shares of Common Stock Beneficially Owned After Completion of the Offering**(1)
Selling Stockholders:	Number	Percentage		Number	Percentage(2)
APSC II HoldCo I, L.P.(3)	8,495,310	3.1%	8,495,310	-	—%
APSC II HoldCo II, L.P.(4)	8,386,255	3.1%	8,386,255	-	—%
Bardin Hill Opportunistic Credit Master (US) Fund II LP(5)	2,849,177	1.1%	2,849,177	-	—%

* Indicates beneficial ownership of less than 1% of the total outstanding Common Stock.

** “Beneficial ownership” is a term broadly defined by the SEC in Rule 13d-3 under the Exchange Act and includes more than typical forms of stock ownership, that is, stock held in the person’s name. The term also includes what is referred to as “indirect ownership,” meaning ownership of shares as to which a person has or shares investment or voting power. For purposes of this table, shares not outstanding that are subject to options, warrants, rights or conversion privileges exercisable within 60 days of May 8, 2026 are deemed outstanding for the purpose of calculating the number and percentage owned by such person, but not deemed outstanding for the purpose of calculating the percentage owned by each other person listed.

(1) Assumes the selling stockholder disposes of all of the shares of Common Stock covered by this prospectus and does not acquire beneficial ownership of any additional shares of Common Stock.

(2) Because the selling stockholder is not obligated to sell any portion of the shares of Common Stock shown as offered by it, we cannot estimate the actual number or percentage of shares of Common Stock that will be held by the selling stockholder upon completion of this offering. However, for purposes of this table, we have assumed that, after completion of the offering, none of the shares covered by this prospectus will be held by the selling stockholder.

(3) APSC II HoldCo I, L.P. (“APSC I”) is a Delaware limited partnership. The limited partner of APSC I that shares beneficial ownership of the shares of Common Stock held by APSC I is Atlantic Park Strategic Capital Master Fund II, L.P. (“AP Master Fund II”). The general partner

of APSC I and AP Master Fund II is Atlantic Park Strategic Capital Fund II GP, L.P. (“Atlantic Park II”), which is controlled by its general partner Atlantic Park UGP, LLC (“AP UGP”), which is controlled by its sole member GAP Holdings GP, LLC (“GAP Holdings GP”), which is controlled by its sole member General Atlantic Partners, L.P. (“GAP LP”). The general partner of GAP LP is GASC GP, LLC (“GASC GP”), which is controlled by the Partnership Committee of GASC MGP, LLC (the “Partnership Committee”). GASC MGP, LLC is the sole member of GASC GP. There are six members of the Partnership Committee, each of whom disclaims beneficial ownership of the shares of Common Stock reported herein except to the extent of any pecuniary interest therein. Each of APSC I, AP Master Fund II, Atlantic Park II, AP UGP, GAP Holdings GP, GAP LP and GASC GP (collectively, the “APSC I Entities”) may be deemed to share voting power and the power to direct the disposition of these shares of Common Stock. The address of the APSC I Entities is 55 East 52nd Street, 33rd Floor, New York, New York 10055. Shares beneficially owned prior to the offering consist of 8,495,310 shares issuable upon exchange of Series A Loans held by APSC I.

(4) APSC II HoldCo II, L.P. (“APSC II”) is a Delaware limited partnership. The limited partner of APSC II that shares beneficial ownership of the shares of Common Stock held by APSC II is Atlantic Park Strategic Capital Parallel Master Fund II, L.P. (“AP Parallel Fund II”). The general partner of APSC II and AP Parallel Fund II is Atlantic Park II, which is controlled by its general partner AP UGP, which is controlled by its sole member GAP Holdings GP, which is controlled by its sole member GAP LP. The general partner of GAP LP is GASC GP, which is controlled by the Partnership Committee. GASC MGP, LLC is the sole member of GASC GP. There are six members of the Partnership Committee, each of whom disclaims beneficial ownership of the share of Common Stock reported herein except to the extent of any pecuniary interest therein. Each of APSC II, AP Parallel Fund II, Atlantic Park II, AP UGP, GAP Holdings GP, GAP LP and GASC GP (collectively, the “APSC II Entities”) may be deemed to share voting power and the power to direct the disposition of these shares of Common Stock. The address of the APSC II Entities is 55 East 52nd Street, 33rd Floor, New York, New York 10055. Shares beneficially owned prior to the offering consist of 8,386,255 shares issuable upon exercise of the Warrants held by APSC II.

(5) Bardin Hill Opportunistic Credit Master (US) Fund II LP (“Bardin Hill”) is a Delaware limited partnership. Man Investment Partners (US) LP is the investment manager of Bardin Hill and has voting and investment discretion with respect to the securities held by Bardin Hill. The address of the principal office of Bardin Hill is c/o Man Investment Partners (US) LP, 299 Park Avenue, 24th Floor, New York, New York 10171. Shares beneficially owned prior to the offering consist of (i) 818,171 shares issuable upon exercise of the Warrants held by Bardin Hill, and (ii) 2,031,006 shares issuable upon exchange of Series A Loans held by Bardin Hill.

PLAN OF DISTRIBUTION

The shares of Common Stock covered by this prospectus may be offered and sold from time to time by the selling stockholders. The term “selling stockholders” includes the selling stockholders’ permitted transferees, successors and assigns who later come to hold any of the selling stockholders’ interest in the Common Stock in accordance with the terms of the Registration Rights Agreement applicable to such selling stockholders’ shares of Common Stock. The selling stockholders will act independently of us in making decisions with respect to the timing, manner and size of each sale. Such sales may be made on one or more exchanges or quotation services or in the over-the-counter market or otherwise, at prices and under terms then prevailing or at prices related to the then-current market price or in negotiated transactions. The selling stockholders may sell their shares of Common Stock by one or more of, or a combination of, the following methods:

•directly to purchasers, including through a specific bidding, auction or other process or in privately negotiated transactions;

•underwritten transactions;

•exchange distributions in accordance with the rules of the applicable exchange and/or secondary distributions;

•sales in the over-the-counter market;

•ordinary brokerage transactions and transactions in which the broker solicits purchasers;

•sales by broker-dealers who agree with the selling stockholder to sell a specified number of such shares of Common Stock at a stipulated price per share;

•a block trade (which may involve crosses) in which the broker or dealer so engaged will attempt to sell the securities as agent but may position and resell a portion of the block as principal to facilitate the transaction;

•purchases by a broker or dealer as principal and resale by such broker or dealer for its own account pursuant to this prospectus;

•settlement of short sales entered into after the date of this prospectus;

•through the writing or settlement of options on the shares or other hedging transactions, whether or not the options are listed on an options exchange;

•through the distribution of the shares of Common Stock by any selling stockholder to its employees, partners (including limited partners), members or stockholders;

•through delayed delivery requirements;

•by pledge to secure debts and other obligations;

•a combination of any such methods of sale; and

•any other method permitted pursuant to applicable law.

In addition, any selling stockholder may from time to time sell shares of Common Stock in compliance with Rule 144 under the Securities Act, if available, or pursuant to other available exemptions from the registration requirements under the Securities Act, rather than pursuant to this prospectus. In such event, any selling stockholder may be required by the securities laws of certain states to offer and sell the shares of Common Stock only through registered or licensed brokers or dealers.

A selling stockholder that is an entity may elect to make an in-kind distribution of shares of Common Stock to its members, partners or stockholders pursuant to the registration statement of which this prospectus is a part by delivering a prospectus with a plan of distribution. Such members, partners or stockholders would thereby receive freely tradeable shares of Common Stock pursuant to the distribution through this registration statement.

Any underwriters and certain broker-dealers or agents that participate in the sale of shares of Common Stock or interests therein may be “underwriters” within the meaning of Section 2(a)(11) of the Securities Act. Any discounts, commissions, concessions or profit they earn on any resale of the shares of Common Stock may be underwriting discounts and commissions under the Securities Act (it being understood that the selling stockholders shall not be deemed to be underwriters solely as a result of their participation in this offering). Any “underwriter” within the meaning of Section 2(a)(11) of the Securities Act in connection with the sale of shares of Common Stock under this prospectus will be subject to the prospectus delivery requirements of the Securities Act. Underwriters and their controlling persons, dealers and agents may be entitled, under agreements that may be entered into with us and the selling stockholders, to indemnification against and contribution toward specific civil liabilities, including liabilities under the Securities Act.

In order to facilitate the offering of the shares of Common Stock under this prospectus, any underwriters or agents, as the case may be, involved in the offering of such shares may engage in transactions that stabilize, maintain or otherwise affect the price of our Common Stock. The underwriters or agents, as the case may be, are not required to engage in these activities, if any, and may end any of these activities at any time.

In connection with sales of shares of Common Stock under this prospectus, any selling stockholder may enter into hedging transactions with broker-dealers, who may in turn engage in short sales of shares of Common Stock in the course of hedging the positions they assume. Any selling stockholder also may sell shares of Common Stock short and deliver them to close its short positions, or loan or pledge shares of Common Stock to broker-dealers that in turn may sell them. Any selling stockholder may also enter into option or other transactions with broker-dealers or other financial institutions or the creation of one or more derivative securities which require the delivery to such broker-dealer or other financial institution of shares offered by this prospectus, which shares such broker-dealer or other financial institution may resell pursuant to this prospectus (as supplemented or amended to reflect such transaction).

Any selling stockholder may from time to time pledge or grant a security interest in some or all of the shares of Common Stock owned by it and, if it defaults in the performance of its secured obligations, the pledgees or secured parties may offer and sell such shares of Common Stock from time to time under this prospectus, or under an amendment to this prospectus under Rule 424 or other applicable provision of the Securities Act amending the list of selling stockholders to include the pledgee, transferee or other successors in interest as selling stockholders under this prospectus.

To the extent required, this prospectus may be amended or supplemented from time to time to describe a specific plan of distribution, including the names of any underwriters, the purchase price and the proceeds the selling stockholders will receive from the sale of shares of Common Stock, any underwriting discounts and other items constituting underwriters’ compensation (it being understood that the selling stockholders shall not be deemed to be underwriters solely as a result of their participation in this offering), any public offering price and any discounts or concessions allowed or reallowed or paid to dealers, and any other information we believe to be material.

The aggregate proceeds to the selling stockholders from the sale of shares of Common Stock offered by them will be the purchase price of the Common Stock less discounts or commissions, if any. Each selling stockholder reserves the right to accept and, together with its agents from time to time, to reject, in whole or in part, any proposed purchase of Common Stock to be made directly or through agents. We will not receive any of the proceeds from any offering by the selling stockholders.

There can be no assurances that the selling stockholders will sell any or all of the shares of Common Stock offered under this prospectus.

DESCRIPTION OF COMMON STOCK TO BE REGISTERED

The following is a summary of our Common Stock and provisions of our Second Amended and Restated Certificate of Incorporation, as amended (the “Certificate of Incorporation”), and our Amended and Restated Bylaws, as amended (the “Bylaws”), and certain provisions of Delaware law. This summary does not purport to be complete and is qualified in its entirety by the provisions of the Certificate of Incorporation and the Bylaws. The Certificate of Incorporation and the Bylaws are incorporated by reference and filed as exhibits to the registration statement of which this prospectus forms a part.

Common Stock

Authorized and Outstanding Shares of Common Stock

The Certificate of Incorporation authorizes the issuance of 480,000,000 shares of Common Stock. As of May 8, 2026, there were 264,992,987 shares of Common Stock outstanding held by approximately 50 holders of record. The number of record holders is based upon the actual number of holders registered at such date and does not include holders of shares in “street name” or persons, partnerships, associated, corporations or entities in security position listings maintained by depositories.

Voting Power

Except as otherwise required by law or as otherwise provided in the certificate of designations for any outstanding series of preferred stock, the holders of our Common Stock possess all voting power for the election of our directors and all other matters requiring stockholder action and will at all times vote together as one class on all matters submitted to a vote of our stockholders. Holders of our shares of Common Stock are entitled to one vote per share on matters to be voted on by stockholders.

Dividends

Subject to the prior rights of all classes or series of stock at the time outstanding having prior rights as to dividends or other distributions, the holders of our Common Stock are entitled to receive such dividends and other distributions, if any, as may be declared from time to time by the Board in its discretion out of funds legally available therefor and shall share equally on a per share basis in such dividends and distributions.

Liquidation, Dissolution and Winding Up

In the event of the voluntary or involuntary liquidation, dissolution, or winding-up of the Company, the holders of our Common Stock are entitled to receive their ratable and proportionate share of the remaining assets of the Company, after the rights of the holders of any outstanding series of preferred stock have been satisfied.

Election of Directors

The Board is currently divided into three classes, Class A, Class B and Class C, with only one class of directors being elected in each year and each class serving a three-year term. There is no cumulative voting with respect to the election of directors.

Dividends

We have not paid any cash dividends on shares of our Common Stock to date. The payment of cash dividends in the future will be dependent upon our revenues and earnings, if any, capital requirements, and general financial condition. The payment of any dividends will be within the discretion of the Board.

Certain Anti-Takeover Provisions of the Certificate of Incorporation, the Bylaws and Delaware Law

Staggered Board of Directors

The Certificate of Incorporation provides that the Board will be classified into three classes of directors of approximately equal size. As a result, in most circumstances, a person can gain control of the Board only by successfully engaging in a proxy contest at two or more annual meetings.

Special Meeting of Stockholders; Action by Written Consent

The Bylaws provide that special meetings of our stockholders may be called only by a majority vote of the Board. Additionally, the Certificate of Incorporation and Bylaws provide that stockholder action can be taken only at an annual or special meeting of stockholders and cannot be taken by written consent in lieu of a meeting.

Advance Notice Requirements for Stockholder Proposals and Director Nominations

The Bylaws provide that stockholders seeking to bring business before an annual meeting of stockholders or to nominate candidates for election as directors at an annual meeting of stockholders must provide timely notice of their intent in writing. To be timely, a stockholder’s notice must be delivered to or mailed and received at the Company’s principal executive offices not less than 60 days nor more than 90 days prior to the meeting. In the event that less than 70 days’ notice or prior public disclosure of the date of the annual meeting of stockholders is given or made to stockholders, a stockholder’s notice shall be timely if received at the Company’s principal executive offices no later than the close of business on the 10th day following the day on which such notice of the date of the annual meeting was mailed or such public disclosure was made, whichever first occurs. The Bylaws also specify certain requirements as to the form and content of a stockholders meeting. These provisions may preclude Company stockholders from bringing matters before an annual meeting of stockholders or from making nominations for directors at an annual meeting of stockholders.

Authorized but Unissued Shares

The Company’s authorized but unissued shares of Common Stock and preferred stock are available for future issuances without stockholder approval, subject to any limitations imposed by the Nasdaq Listing Rules. Such additional shares could be utilized for a variety of corporate purposes, including future offerings to raise additional capital, acquisitions and employee benefit plans. The existence of authorized but unissued and unreserved shares of Common Stock and preferred stock could render more difficult or discourage an attempt to obtain control of us by means of a proxy contest, tender offer, merger or otherwise.

Exclusive Forum Selection

The Certificate of Incorporation requires, to the fullest extent permitted by law, that derivative actions brought in Company’s name, actions against directors, officers and employees for breach of fiduciary duty and other certain actions be brought only in the Court of Chancery in the State of Delaware. Although the Company believes this provision benefits it by providing increased consistency in the application of Delaware law in the types of lawsuits to which it applies, the provision may have the effect of discouraging lawsuits against the Company’s directors and officers. However, the exclusive forum provision in the Certificate of Incorporation does not apply to suits brought to enforce any duty or liability created by the Exchange Act or the Securities Act or any claim with respect to which the federal courts have exclusive jurisdiction.

Transfer Agent and Registrar

The transfer agent and registrar for the Common Stock is Continental Stock Transfer & Trust Company, One State Street Plaza, 30th Floor, New York, NY 10004-1561.

Securities Exchange

The Common Stock is traded on the Nasdaq Capital Market under the symbol “NEXT.”

LEGAL MATTERS

Unless otherwise indicated in the applicable prospectus supplement, the validity of any securities offered on this registration statement were passed upon for us by our counsel, Latham & Watkins LLP, Houston, Texas. Any underwriters will be represented by their own legal counsel.

EXPERTS

The consolidated financial statements of NextDecade Corporation and subsidiaries as of December 31, 2025 and 2024, and for each of the years in the two-year period ended December 31, 2025, and management’s assessment of the effectiveness of internal control over financial reporting as of December 31, 2025 have been incorporated by reference herein in reliance upon the reports of KPMG LLP, independent registered public accounting firm, incorporated by reference herein, and upon the authority of said firm as experts in accounting and auditing.

The audited financial statements for the year ended December 31, 2023 incorporated by reference in this prospectus and elsewhere in the registration statement have been so incorporated by reference in reliance upon the report of Grant Thornton LLP, independent registered public accountants, upon the authority of said firm as experts in accounting and auditing.

NextDecade Corporation 19,730,742 Shares of Common Stock

PROSPECTUS

PART II
INFORMATION NOT REQUIRED IN PROSPECTUS

Item 14. Other Expenses of Issuance and Distribution

The following table sets forth the various expenses expected to be incurred by the Company in connection with the sale and distribution of the securities being registered hereby, other than underwriting discounts and commissions. All such expenses will be borne by the Company.


SEC registration fee			$20,068.27
FINRA filing fee			(1)
Accounting fees and expenses			(1)
Legal fees and expenses			(1)
Printing expenses			(1)
Miscellaneous fees and expenses			(1)
Total			$(1)

(1) Fees and expenses (other than the SEC registration fee to be paid upon the filing of this registration statement) will depend on the number and nature of the offerings of Common Stock and cannot be estimated at this time. An estimate of the aggregate expenses in connection with the issuance and distribution of the Common Stock being offered will be included in any applicable prospectus supplement.

Item 15. Indemnification of Directors and Officers

The Company is incorporated under the laws of the State of Delaware. Section 102(b)(7) of the General Corporation Law of the State of Delaware (the “DGCL”) allows a corporation to provide in its certificate of incorporation that a director of the corporation will not be personally liable to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a director, except where the director breached the duty of loyalty, failed to act in good faith, engaged in intentional misconduct or knowingly violated a law, authorized the payment of a dividend or approved a stock repurchase in violation of Delaware corporate law or obtained an improper personal benefit. The Certificate of Incorporation provides for this limitation of liability.

Section 145 of the DGCL provides that a Delaware corporation may indemnify any person who was, is or is threatened to be made party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of such corporation), by reason of the fact that such person is or was a director, an officer, an employee or an agent of such corporation or is or was serving at the request of such corporation as a director, an officer, an employee or an agent of another corporation or enterprise. The indemnity may include expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding, provided such person acted in good faith and in a manner he reasonably believed to be in or not opposed to the corporation’s best interests and, with respect to any criminal action or proceeding, had no reasonable cause to believe that his or her conduct was illegal. A Delaware corporation may indemnify any persons who are, were or are threatened to be made a party to any threatened, pending or completed action or suit by or in the right of the corporation by reason of the fact that such person is or was a director, an officer, an employee or an agent of another corporation or enterprise. The indemnity may include expenses (including attorneys’ fees) actually and reasonably incurred by such person in connection with the defense or settlement of such action or suit, provided such person acted in good faith and in a manner he reasonably believed to be in or not opposed to the corporation’s best interests, provided that no indemnification is permitted without judicial approval if the director, officer, employee or agent is adjudged to be liable to the corporation. Where an officer or director is successful on the merits or otherwise in the defense of any action referred to above, the corporation must indemnify him against the expenses which such officer or director has actually and reasonably incurred.

Under Section 6.1 of the Bylaws, the Company shall indemnify and provide advancement to any current or former director or officer of the Company (the “Indemnitee”) against any threatened, pending or completed action,

suit, arbitration, mediation, alternate dispute resolution mechanism, investigation, inquiry, administrative hearing or any other actual, threatened or completed proceeding (as such term is more specifically defined in Section 6.7(c) of our Bylaws, the “Proceeding”) to the fullest extent permitted by law, as such may be amended from time to time. The Company shall indemnify such Indemnitee against all expenses, judgments, penalties, fines and amounts paid in settlement actually and reasonably incurred by him or her, or on his or her behalf, in connection with such Proceeding or any claim, issue or matter therein, if Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company, and with respect to any criminal Proceeding, had no reasonable cause to believe Indemnitee’s conduct was unlawful.

The indemnification rights set forth above shall not be exclusive of any other right which an indemnified person may have or hereafter acquire under any statute, provision of the Certificate of Incorporation or the Bylaws, agreements, vote of stockholders or disinterested directors or otherwise.

We expect to maintain standard policies of insurance that provide coverage (i) to our directors and officers against loss rising from claims made by reason of breach of duty or other wrongful act and (ii) to us with respect to indemnification payments that we may make to such directors and officers.

Item 16. Exhibits and Financial Statement Schedules

(a)Exhibits.

The exhibits listed below in the “Exhibit Index” are part of this registration statement and are incorporated herein by reference.

EXHIBIT INDEX


Exhibit Number			Description
3.1			Second Amended and Restated Certificate of Incorporation, dated July 24, 2017 (Incorporated by reference to Exhibit 3.1 of the Registrant’s Current Report on Form 8-K, filed July 28, 2017).
3.2			Amended and Restated Bylaws, dated July 24, 2017 (Incorporated by reference to Exhibit 3.2 of the Registrant’s Current Report on Form 8-K, filed July 28, 2017).
3.3			Amendment No. 1 to the Amended and Restated Bylaws, dated March 3, 2021 (Incorporated by reference to Exhibit 3.1 of the Company’s Current Report on Form 8-K, filed March 4, 2021).
4.1			Specimen Common Stock certificate (Incorporated by reference to Exhibit 4.1 of the Registrant’s Annual Report on Form 10-K, filed March 3, 2020).
5.1*			Opinion of Latham & Watkins LLP.
10.1			Second Amended and Restated Registration Rights Agreement, dated November 17, 2025, by and among NextDecade Corporation, APSC II HoldCo II, L.P., and Bardin Hill Opportunistic Credit Master (US) Fund II LP (Incorporated by reference to Exhibit 10.105 of the Registrant’s Annual Report on Form 10-K, filed March 2, 2026).
10.2			Form of Amended Tranche A/B/C Warrant Agreement (Incorporated by reference to Exhibit 4.2 of the Registrant’s Annual Report on Form 10-K, filed March 2, 2026).
10.3			Amended and Restated Credit Agreement, dated November 17, 2025, by and among Rio Grande Super Holdings, LLC, as Borrower, NextDecade Corporation, Atlantic Park Strategic Capital Master Fund II, L.P., as Administrative Agent and Collateral Agent, and the other lenders party thereto (Incorporated by reference to Exhibit 10.104 of the Registrant’s Annual Report on Form 10-K, filed March 2, 2026).
23.1*			Consent of KPMG LLP .
23.2*			Consent of Grant Thornton LLP.
23.3*			Consent of Latham & Watkins LLP (included as part of Exhibit 5.1).
24.1*			Power of Attorney (included on the signature page to this registration statement).
107*			Filing Fee Table.

* Filed herewith.

Item 17. Undertakings

(b)The undersigned Registrant hereby undertakes:

(1)To file, during any period in which offers or sales are being made, a post-effective amendment to this registration statement:

(i)To include any prospectus required by Section 10(a)(3) of the Securities Act;

(ii)To reflect in the prospectus any facts or events arising after the effective date of the registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in the registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the SEC pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than a 20% change in the maximum aggregate offering price set forth in the “Calculation of Registration Fee” table in the effective registration statement; and

(iii)To include any material information with respect to the plan of distribution not previously disclosed in the registration statement or any material change to such information in the registration statement; provided, however, that clauses (a)(1)(i), (a)(1)(ii) and (a)(1)(iii) of this section do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the Registrant pursuant to Section 13 or Section 15(d) of the Exchange Act that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement;

(2)That, for the purpose of determining any liability under the Securities Act, each such post-effective amendment shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof;

(3)To remove from registration by means of a post-effective amendment any of the securities being registered which remain unsold at the termination of the offering;

(4)That, for the purpose of determining liability under the Securities Act to any purchaser:

(A)Each prospectus filed by the Registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(B)Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5) or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii) or (x) for the purpose of providing the information required by Section 10(a) of the Securities Act shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of

such securities at that time shall be deemed to be the initial bona fide offering thereof; provided, however, that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date;

(5)That, for the purpose of determining liability of the Registrant under the Securities Act to any purchaser in the initial distribution of the securities, the undersigned Registrant undertakes that in a primary offering of securities of the undersigned Registrant pursuant to this registration statement, regardless of the underwriting method used to sell the securities to the purchaser, if the securities are offered or sold to such purchaser by means of any of the following communications, the undersigned Registrant will be a seller to the purchaser and will be considered to offer or sell such securities to such purchaser:

(A)Any preliminary prospectus or prospectus of the undersigned Registrant relating to the offering required to be filed pursuant to Rule 424;

(B)Any free writing prospectus relating to the offering prepared by or on behalf of the undersigned Registrant or used or referred to by the undersigned Registrant;

(C)The portion of any other free writing prospectus relating to the offering containing material information about the undersigned Registrant or its securities provided by or on behalf of the undersigned Registrant; and

(D)any other communication that is an offer in the offering made by the undersigned Registrant to the purchaser.

(c)The undersigned Registrant hereby undertakes that, for purposes of determining any liability under the Securities Act, each filing of the Registrant’s annual report pursuant to Section 13(a) or Section 15(d) of the Exchange Act (and, where applicable, each filing of an employee benefit plan’s annual report pursuant to Section 15(d) of the Exchange Act) that is incorporated by reference in the registration statement shall be deemed to be a new registration statement relating to the securities offered therein, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof.

(d)Insofar as indemnification for liabilities arising under the Securities Act may be permitted to directors, officers and controlling persons of the Registrant pursuant to the foregoing provisions, or otherwise, the Registrant has been advised that in the opinion of the SEC such indemnification is against public policy as expressed in the Securities Act and is, therefore, unenforceable. In the event that a claim for indemnification against such liabilities (other than the payment by the Registrant of expenses incurred or paid by a director, officer or controlling person of the Registrant in the successful defense of any action, suit or proceeding) is asserted by such director, officer or controlling person in connection with the securities being registered, the Registrant will, unless in the opinion of its counsel the matter has been settled by controlling precedent, submit to a court of appropriate jurisdiction the question whether such indemnification by it is against public policy as expressed in the Securities Act and will be governed by the final adjudication of such issue.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement on Form S-3 to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Houston, State of Texas, on May 13, 2026.


NEXTDECADE CORPORATION
By:			/s/ Michael R. Mott
			Michael R. Mott
			Senior Vice President, Enterprise Transformation and Interim Chief Financial Officer

POWER OF ATTORNEY

Each of the undersigned officers and directors of NextDecade Corporation hereby constitutes and appoints Michael R. Mott and Vera de Gyarfas and each of them, his or her true and lawful attorneys-in-fact and agents, each with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to sign any and all (i) amendments (including post-effective amendments) and additions to this registration statement of NextDecade Corporation on Form S-3 and (ii) to file the same, with all exhibits thereto, and other documents in connection therewith, with the SEC, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite or necessary to be done in connection therewith, as fully and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that each of said attorneys-in-fact and agents, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act of 1933, as amended, this registration statement has been signed by the following persons in the capacities set forth opposite their names and on May 13, 2026.


Name						Title

/s/ Matthew K. Schatzman						Chairman of the Board and Chief Executive Officer
Matthew K. Schatzman						(Principal Executive Officer)

/s/ Michael R. Mott						Senior Vice President, Enterprise Transformation and Interim Chief Financial Officer
Michael R. Mott						(Principal Financial Officer)

/s/ Luke Boylston						Chief Accounting Officer
Luke Boylston						(Principal Accounting Officer)

/s/ Giovanni Oddo						Director
Giovanni Oddo


/s/ Brian Belke						Director
Brian Belke

/s/ Frank Chapman						Director
Frank Chapman

/s/ Avinash Kripalani						Director
Avinash Kripalani

/s/ Arnaud Lenail-Chouteau						Director
Arnaud Lenail-Chouteau

/s/ Edward Andrew Scoggins, Jr.						Director
Edward Andrew Scoggins, Jr.

/s/ William Vrattos						Director
William Vrattos

/s/ Spencer Wells						Director
Spencer Wells

/s/ Pamela Beall						Director
Pamela Beall

/s/ Diana Sands						Director
Diana Sands

/s/ In Kyu Park						Director
In Kyu Park