X0306 4 2019-10-01 0 0000275880 PARSONS CORP PSN 0001699448 McMahon Harry T. PARSONS CORPORATION 5875 TRINITY PARKWAY #300 CENTREVILLE VA 20120 1 0 0 0 Restricted Stock Units 2019-10-01 4 A 0 1123 0.00 A Common Stock 1123 1123 D Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock. The restricted stock units will vest on September 30, 2020. Vested shares will be delivered pursuant to the terms and conditions set forth in the applicable grant notice for such restricted stock units. /s/ Michael R. Kolloway, as attorney-in-fact 2019-10-01