UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): May 16, 2016

AECOM

(Exact name of Registrant as specified in its charter)

1999 Avenue of the Stars, Suite 2600

Los Angeles, California 90067

(Address of Principal Executive Offices, including Zip Code)

Registrant’s telephone number, including area code  (213) 593-8000

Not Applicable

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

o      Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o      Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o      Pre-commencement communications pursuant to Rule 14d-(b) under the Exchange Act (17 CFR 240.14d-2(b))

o      Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Item 5.04           Temporary Suspension of Trading Under Registrant’s Employee Benefit Plans

On May 16, 2016, AECOM received notice from the plan administrator to merge the AECOM 401(k) Retirement Plan, the Hunt Corporation Retirement Savings Plan and the McNeil Technologies, Inc. 401(k) Plan into the AECOM Retirement & Savings Plan (each a “Plan” and collectively, the “Plans”) on July 1, 2016.

The expected merger of the Plans will include a blackout period in which certain Plan participants will be unable to engage in transactions involving the assets held in the Plan accounts, including changing contribution rates, directing or diversifying investments, or obtaining a loan, withdrawal, or distribution (the “Blackout Period”).

As described in the Notice, the Blackout Period is expected to begin on June 15, 2016 and end during the week of July 11, 2016.  During the Blackout Period and for two years after the ending date of the Blackout Period, a security holder or other interested person may obtain, without charge, the actual beginning and ending dates of the Blackout Period, by submitting a request to AECOM, 1999 Avenue of the Stars, Suite 2600, Los Angeles, CA, 90067, Attn: Corporate VP Global Benefits, Human Resources, (213) 593-8000.

On May 18, 2016, the Company completed sending a notice to its directors and executive officers (the “Notice”) informing them of the Blackout Period and the restrictions on trading in AECOM common stock that apply to them during the Blackout Period, pursuant to Section 306 of the Sarbanes-Oxley Act of 2002 and Rule 104 of Regulation BTR.  A copy of the Notice is attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated by reference.

Item 9.01              Financial Statements and Exhibits

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereto duly authorized.

EXHIBIT INDEX

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Exhibit 99.1

Notice of Blackout Period to

Directors and Executive Officers of AECOM — Merger of Retirement Plans

AECOM expects that the AECOM 401(k) Retirement Plan (the legacy URS 401(k) plan), the Hunt Corporation Retirement Savings Plan and the McNeil Technologies, Inc. 401(k) Plan will merge into the AECOM Retirement & Savings Plan (each a “Plan” and collectively, the “Plans”) on July 1, 2016.  To effect the merger of the Plans, we will institute a blackout period during which certain Plan participants cannot engage in Plan transactions, including changing contribution rates, directing or diversifying investments, or obtaining a loan, withdrawal, or distribution (the “Blackout Period”).

The Blackout Period is expected to begin on June 15, 2016 and end during the week of July 11, 2016.   You can determine whether the Blackout Period has begun or ended by contacting Bernie Knobbe, Corporate VP Global Benefits, Human Resources, (213) 593-8054.

If the Blackout Period begins as expected on June 15, this should have no effect on you since as a director or executive officer you are already precluded during this Blackout Period from trading in AECOM securities under AECOM’s regular trading window, which would be closed during that time.  Please note the Blackout Period does not affect any transactions made in an established 10b5-1 plan, per prior elections in AECOM’s Employee Stock Purchase Plan or non-AECOM 401(k)/Hunt Retirement Savings Plan transactions for certain individuals.

Nevertheless, we are required by Sarbanes-Oxley and Regulation BTR to inform you that, during the Blackout Period, you are generally prohibited from directly or indirectly purchasing, selling, or otherwise transferring any equity security of AECOM, regardless of whether you participate in the Plans.

If you have any questions concerning the Blackout Period, please contact Bernie Knobbe by phone at (213) 593-8054, or you may write to AECOM, 1999 Avenue of the Stars, Suite 2600, Los Angeles, CA, 90067, Attn: Bernie Knobbe, Corporate VP Global Benefits, Human Resources.