On December 27, 2019, pursuant to the terms of that certain Purchaser Rights Agreement, dated as of October 28, 2019, by and between NextDecade Corporation (the Company) and Ninteenth Investment Company LLC, the Board of Directors of the Company appointed Khalifa Abdulla Al Romaithi as a Class B director of the Board. In connection with Mr. Al Romaithi's appointment to the Board, the size of the Board was increased from eleven to twelve members. Mr. Al Romaithi will serve as a Class B director until the Company's 2020 annual meeting of stockholders or until his successor is duly elected and qualified or the earlier of his death, resignation or removal. Mr. Al Romaithi is the Executive Director, Midstream, in the Petroleum and Petrochemicals business at Mubadala Investment Company (Mubadala).