On September 14, 2022 (the “Closing Date”) of the transactions contemplated by that certain Agreement and Plan of Merger, dated as of May 13, 2022 (the “Merger Agreement”), by and among ManTech International Corporation (the “Company”), Moose Bidco Inc. (“Parent”), and Moose Merger Sub Inc. and a direct, wholly owned subsidiary of Parent (“Merger Sub”), pursuant to which Merger Sub merged with and into the Company (the “Merger”), with the Company surviving the Merger as a wholly owned subsidiary of Parent. In connection with the consummation of the Merger, as contemplated by the Merger Agreement (and not because of any disagreement with the Company), each of Richard L. Armitage, Mary K. Bush, Barry G. Campbell, Richard J. Kerr, Peter B. LaMontagne, Kenneth A. Minihan, and Kevin M. Phillips resigned from his or her respective position as a member of the board of directors of the Company, and any committee thereof, effective as of the Closing (as defined in the Merger Agreement). In accordance with the terms of the Merger Agreement, as of the Closing, Mr. Kevin M. Phillips and Mr. Matthew Tait became and constitute the only directors of the Company, and such directors shall serve until their successors have been duly elected or appointed and qualified or until their death, resignation or removal in accordance with the organizational documents of the surviving corporation.

As of the Closing, Messrs. Phillips and Tait became and constitute the only officers of the surviving corporation, and such officers shall serve until their successors have been duly elected or appointed and qualified or until their death, resignation or removal in accordance with the organizational documents of the surviving corporation.