X0306 4 2018-03-13 0 0000868857 AECOM ACM 0001623417 McQuade Daniel P C/O AECOM 1999 AVENUE OF THE STARS, SUITE 2600 LOS ANGELES CA 90067 0 1 0 0 President, Construction Srvcs. Common Stock 2018-03-13 4 S 0 12935 37.00 D 2642 D Common Stock 521.9697 I by Merrill Lynch under AECOM Retirement & Savings Plan (RSP) Restricted Stock Units Common Stock 10696 10696 D Restricted Stock Units Common Stock 10483 10483 D Restricted Stock Units Common Stock 10832 10832 D The sale in this Form 4 was made pursuant to a 10b5-1 trading plan adopted on February 8, 2018. Includes shares acquired from the AECOM Employee Stock Purchase Plan. The number of shares reported as beneficially owned in Column 5 of the Form 4 filed on December 18, 2017 were overstated by 8,803 shares and accordingly these 8,803 shares were not reported as beneficially owned in Column 5 for the March 13, 2018 transaction. Each restricted stock unit represents a contingent right to receive one share of AECOM common stock. The restricted stock units vest in December 2018. The restricted stock units vest in December 2019. The restricted stock units vest in December 2020 /s/ Charles Szurgot, Attorney-in-Fact for Daniel P. McQuade 2018-03-15