X0306 4 2018-02-28 0 0000868857 AECOM ACM 0001477553 Frist William H. C/O AECOM 1999 AVENUE OF THE STARS, SUITE 2600 LOS ANGELES CA 90067 1 0 0 0 Common Stock 2018-02-28 4 M 0 4229 A 41852 D Restricted Stock Units 2018-02-28 4 M 0 4229 0 D Common Stock 4229 0 D Restricted Stock Units 2018-02-28 4 A 0 4506 0 A Common Stock 4506 4506 D Each restricted stock unit represented a contingent right to receive one share of AECOM common stock. On February 28, 2018, 4,229 of the reporting person restricted stock units vested and were settled for an equal number of shares of AECOM common stock. Each restricted stock unit represents a contingent right to receive one share of AECOM common stock. The restricted stock units vest on the earlier of February 28, 2019 or the date of the Corporation's 2019 Annual Meeting of Stockholders. /s/ Charles Szurgot, Attorney-in-Fact for William H. Frist 2018-03-02