|AECOM filed this Form 11-K on 06/14/2018|
D. INVESTMENT IN AECOM DC RETIREMENT PLANS VANGUARD MASTER TRUST
Beginning January 1, 2016, certain investment assets of the Plan are held in a custody account at The Vanguard Group and consists of an interest in an investment account of the AECOM DC Retirement Plans Vanguard Master Trust (Vanguard Master Trust), a master trust established by AECOM and is administered by the Trustee. The Vanguard Master Trust combines the Plans assets with the assets of two other retirement savings plans sponsored by AECOM for investment and administrative purposes. Although the assets of the three retirement plans are combined in the Vanguard Master Trust, the Trustee maintains supporting records for the purpose of allocating the net gain or loss of the investment funds to the participating plans. The net investment gain or loss of the Vanguard Master Trust investment funds is allocated by the Trustee to each participating plan based on that plans interest in each investment fund, as compared with the total interest of all the participating plans in each investment fund. Investment gains or losses are recognized as earned based on the terms of the investments and the period during which the investments are held by the Vanguard Master Trust. The Plans interest in the Vanguard Master Trust represents approximately 91.5% and 92.0% of the net assets of the Vanguard Master Trust at December 31, 2017 and 2016, respectively.
The following table presents the net assets of the Vanguard Master Trust as of December 31:
The following table shows the changes in net assets for the Vanguard Master Trust for the year ended December 31:
The following tables set forth by level, within the fair value hierarchy, the Vanguard Master Trust assets at fair value: