NextDecade Corp

(a)On February 25, 2026, the Board of Directors approved the principal terms of a NextDecade Corporation Executive Severance Plan (the “Severance Plan”).

The Severance Plan will provide severance benefits to employees in the position of Senior Vice President and above, other than the Chief Executive Officer who has severance benefits provided for in his employment agreement, which group includes certain of the Company’s named executive officers (the “Participants”). The Participants will be eligible for severance benefits under the Executive Severance Plan if their employment is terminated by the Company and its subsidiaries other than for “Cause” or if the Participant resigns for “Good Reason” (as each of those terms is to be defined in the Severance Plan).

If a Participant’s employment terminates without Cause (other than due to death or disability) or for Good Reason, subject to his or her timely execution and non-revocation of a release of claims, he or she will be eligible to receive severance benefits that include the following:

•An amount equal to a multiple of the Participant’s annual base salary in effect at the date of termination, to be paid within 60 days of such termination, with such multiple being 0.5 times for Senior Vice Presidents and 1.0 times for Executive Vice Presidents and above;

•An amount equal to a multiple of the Participant’s annual target bonus for the year in which the termination occurs, to be paid within 60 days of such termination, with such multiple being 0.5 times for Senior Vice Presidents and 1.0 times for Executive Vice Presidents and above;

•An amount equal to the Participant’s annual target bonus for the year in which the termination occurs, prorated based on the number of days the Participant was an employee of the Company, to be paid within 60 days of such termination;

•Medical, dental and vision coverage following such termination for up to six months for Senior Vice Presidents and 12 months for Executive Vice Presidents and above; and

•Accelerated vesting of a prorated portion of all outstanding time-based equity awards and continued vesting of a prorated portion of all outstanding performance-based equity awards through the conclusion of the applicable performance period, which will be settled based on actual performance at the end of the applicable performance period.

If the termination of employment occurs during the two-year period following a Change of Control (as defined in the NextDecade Corporation 2017 Omnibus Incentive Plan), the severance benefits will include:

•An amount equal to a multiple of the Participant’s annual base salary in effect at the date of termination, to be paid within 60 days of such termination, with such multiple being 1.0 times for Senior Vice Presidents and 2.0 times for Executive Vice Presidents and above;

•An amount equal to a multiple of the Participant’s annual target bonus for the year in which the termination occurs, to be paid within 60 days of such termination, with such multiple being 1.0 times for Senior Vice Presidents and 2.0 times for Executive Vice Presidents and above;

•An amount equal to the Participant’s annual target bonus for the year in which the termination occurs, prorated based on the number of days the Participant was an employee of the Company, to be paid within 60 days of such termination, to be paid no later than at the same time bonuses are paid to senior executives of the Company;

•Medical, dental and vision coverage following such termination following such termination for up to 12 months for Senior Vice Presidents and 24 months for Executive Vice Presidents and above; and

•Accelerated vesting of all outstanding time-based equity awards and all outstanding performance-based equity awards, with performance-based equity awards vesting at the greater of target performance and actual performance.

The foregoing description of the Severance Plan does not purport to be complete and is qualified in its entirety by reference to the plan document for the Severance Plan, which will be finalized in the near term and filed as an exhibit to the Company’s periodic report covering the applicable fiscal period during which the plan document becomes finalized.

(b)Securities Trading Plans of Directors and Executive Officers

During the three months ended December 31, 2025, none of our directors or executive officers adopted orterminated any contract, instruction or written plan for the purchase or sale of our securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any “non-Rule 10b5-1 trading arrangement.”