X0306 4 2023-01-03 0 0000275880 PARSONS CORP PSN 0001601188 Ball George L. PARSONS CORPORATION 5875 TRINITY PARKWAY #300 CENTREVILLE VA 20120 1 0 0 0 Common Stock 2023-01-03 4 A 0 535 0.00 A 118578 D Common Stock 205000 I By Family Trust Represents an award of fully vested restricted stock units. Vested shares will be delivered pursuant to the terms and conditions set forth in the applicable grant notice for such restricted stock units. These shares are held by the George L. and Coleen M. Ball Family Trust UA 01-18-2005 (the "Trust"). Mr. Ball has shared voting, investment and dispositive power over the shares held by the Trust. /s/ Michael R. Kolloway, as attorney-in-fact 2023-01-05