AECOM
MX ˙ BMV ˙ US00766T1007
SecurityMX:ACM / AECOM
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership254,951 shares
Latest Disclosed Value $ 21,624,942
Robeco Institutional Asset Management B.V. reports 129.72% increase in ownership of ACM / AECOM

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 254,951 shares of AECOM (MX:ACM) valued at $21,624,942 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 110,982 shares of AECOM. This represents a change in shares of 129.72% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-21 2026-03-31 13F AECOM COM 00766T100 254,951 143,969 129.72 21,625 104.40 0.0308
2026-01-23 2025-12-31 13F AECOM COM 00766T100 110,982 -2,256 -1.99 10,580 -28.39 0.0151
2025-10-22 2025-09-30 13F AECOM COM 00766T100 113,238 5,576 5.18 14,774 21.60 0.0214
2025-07-18 2025-06-30 13F AECOM COM 00766T100 107,662 6,466 6.39 12,151 29.49 0.0196
2025-04-23 2025-03-31 13F AECOM COM 00766T100 101,196 3,258 3.33 9,384 -10.30 0.0182
2025-01-23 2024-12-31 13F AECOM COM 00766T100 97,938 46,486 90.35 10,462 96.89 0.0198
2024-10-29 2024-09-30 13F AECOM COM 00766T100 51,452 -8,499 -14.18 5,313 0.55 0.0106
2024-07-23 2024-06-30 13F AECOM COM 00766T100 59,951 -62,172 -50.91 5,284 -55.88 0.0114
2024-04-24 2024-03-31 13F AECOM COM 00766T100 122,123 5,403 4.63 11,978 11.02 0.0260
2024-02-14 2023-12-31 13F/A-1 AECOM COM 00766T100 116,720 -621,249 -84.18 10,788 -82.40 0.0262
2024-02-08 2023-12-31 13F AECOM COM 00766T100 96,856 -641,113 117 0.0219
2023-10-24 2023-09-30 13F AECOM COM 00766T100 737,969 -10,843 -1.45 61,281 -3.37 0.1638
2023-07-24 2023-06-30 13F AECOM COM 00766T100 748,812 17,061 2.33 63,417 2.78 0.1663
2023-05-04 2023-03-31 13F AECOM COM 00766T100 731,751 727,694 17,936.75 61,701 17,836.34 0.1682
2023-02-07 2022-12-31 13F AECOM COM 00766T100 4,057 0 0.00 345 24.19 0.0010
2022-12-01 2022-09-30 13F/A-1 AECOM COM 00766T100 4,057 0 0.00 277 4.53 0.0009
2022-10-27 2022-09-30 13F AECOM COM 00766T100 19,629 -868 1,342 0.0043
2022-12-01 2022-06-30 13F/A-1 AECOM COM 00766T100 4,057 -899,000 -99.55 265 -99.62 0.0008
2022-07-27 2022-06-30 13F AECOM COM 00766T100 20,497 -882,560 1,337 0.0041
2022-12-01 2022-03-31 13F/A-1 AECOM COM 00766T100 903,057 26,057 2.97 69,364 2.25 0.1634
2022-04-26 2022-03-31 13F AECOM COM 00766T100 903,057 26,057 69,364 0.1614
2022-12-01 2021-12-31 13F/A-1 AECOM COM 00766T100 877,000 91,000 11.58 67,836 36.67 0.1444
2022-01-31 2021-12-31 13F AECOM COM 00766T100 877,000 91,000 67,836 0.1426
2022-12-01 2021-09-30 13F/A-1 AECOM COM 00766T100 786,000 369,000 88.49 49,636 87.99 0.1100
2021-10-20 2021-09-30 13F AECOM COM 00766T100 786,000 369,000 49,636 0.1086
2022-12-01 2021-06-30 13F/A-1 AECOM COM 00766T100 417,000 417,000 26,404 0.0585
2021-07-28 2021-06-30 13F AECOM COM 00766T100 417,000 417,000 26,404 0.0577
2014-11-10 2014-09-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 0 -34,300 -100.00 0 -100.00
2014-08-13 2014-06-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 34,300 0 0.00 1,104 0.09 0.0079
2014-05-07 2014-03-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 34,300 -66,304 -65.91 1,103 -64.94 0.0085
2013-11-12 2013-09-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 100,604 0 0.00 3,146 -1.63 0.0306
2013-08-27 2013-06-30 13F AECOM Technology COM 00766T100 100,604 100,604 3,198 0.0324
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.