X0306 4/A 2020-07-21 2020-07-23 0 0000275880 PARSONS CORP PSN 0001787479 McDew Darren W PARSONS CORPORATION 5875 TRINITY PARKWAY #300 CENTREVILLE VA 20120 1 0 0 0 Restricted Stock Units 2020-07-21 4 A 0 4540 0.00 A Common Stock 4540 4540 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 April 20, 2021. Vested shares will be delivered pursuant to the terms and conditions set forth in the applicable grant notice for such restricted stock units. The original Form 4 overstated the number of restricted stock units awarded to the Reporting Person. This amendment is being filed to correctly report the number of restricted stock units awarded. /s/ Michael R. Kolloway, as attorney-in-fact 2020-08-05