Aecom reported $20.4B of remaining performance obligations at 30 Jun 2026, up 14% from a year earlier and up 1% from the previous quarter. That is 1.3 years of trailing revenue already under contract. Book-to-bill last quarter: 1.08.
Net new backlog added in the latest quarter: $300M.
Over the last twelve months it turned about 80% of its opening backlog into revenue (12-month conversion).
60% of the backlog is due within the next twelve months.
Customer prepayments (contract liabilities) cover 5.5% of the backlog.
Twelve-month book-to-bill: 1.16, i.e. 1.16 of new orders for every 1 of revenue recognised.
Backlog growth minus revenue growth: +18 points — orders are running ahead of revenue.
By backlog size it ranks 45th among US filers the cockpit tracks.
Aecom backlog history
Remaining performance obligations at each quarter end (bars) against trailing twelve-month revenue (line).
Amounts in USD. Source: SEC XBRL filings.
Quarter end
Backlog (RPO)
TTM revenue
Coverage
Customer prepayments
30 Jun 2026
$20.4B
$15.4B
1.3 yrs
$1.13B
31 Mar 2026
$20.1B
$16.0B
1.3 yrs
$1.12B
31 Dec 2025
$19.4B
$16.0B
1.2 yrs
$1.09B
30 Sep 2025
$19.7B
$16.1B
1.2 yrs
$1.09B
30 Jun 2025
$17.9B
$16.1B
1.1 yrs
$1.17B
31 Mar 2025
$18.5B
$16.0B
1.2 yrs
$1.26B
31 Dec 2024
$19.1B
$16.2B
1.2 yrs
$1.31B
30 Sep 2024
$19.8B
$16.1B
1.2 yrs
$1.30B
30 Jun 2024
$20.7B
$15.8B
1.3 yrs
$1.26B
31 Mar 2024
$21.4B
$15.3B
1.4 yrs
$1.27B
31 Dec 2023
$21.8B
$14.9B
1.5 yrs
$1.28B
30 Sep 2023
$21.9B
$14.4B
1.5 yrs
$1.19B
Questions
What is Aecom's backlog?
Aecom reported $20.4B of remaining performance obligations at 30 Jun 2026, up 14% from a year earlier and up 1% from the previous quarter. That is 1.3 years of trailing revenue already under contract. Book-to-bill last quarter: 1.08.
How fast does Aecom's backlog turn into revenue?
Over the last twelve months Aecom recognised revenue equal to about 80% of the backlog it started each quarter with.
About these numbers
Remaining performance obligations (RPO) are revenue a company has contracted but not yet recognised, as reported in its SEC filings (XBRL tag RevenueRemainingPerformanceObligation). Coverage = backlog ÷ trailing twelve-month revenue. Book-to-bill = (change in backlog + revenue) ÷ revenue. Conversion = revenue recognised ÷ the backlog at the start of each quarter, summed over four quarters. Counterparty values come from company filings and releases.