AECOM
MX ˙ BMV ˙ US00766T1007
SecurityMX:ACM / AECOM
InstitutionRobeco Schweiz AG
Latest Disclosed Ownership371,937 shares
Latest Disclosed Value $ 31,547,697
Robeco Schweiz AG reports 2.33% decrease in ownership of ACM / AECOM

On May 7, 2026 - Robeco Schweiz AG filed a 13F-HR form disclosing ownership of 371,937 shares of AECOM (MX:ACM) valued at $31,547,697 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 3, 2026 disclosing 380,804 shares of AECOM. This represents a change in shares of -2.33% 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-07 2026-03-31 13F AECOM COM 00766T100 371,937 -8,867 -2.33 31,548 -13.10 0.6672
2026-02-03 2025-12-31 13F AECOM COM 00766T100 380,804 29,928 8.53 36,302 -20.70 0.8134
2025-10-27 2025-09-30 13F AECOM COM 00766T100 350,876 -28,647 -7.55 45,779 6.88 1.0291
2025-08-07 2025-06-30 13F AECOM COM 00766T100 379,523 -53,713 -12.40 42,833 6.62 0.9885
2025-04-30 2025-03-31 13F AECOM COM 00766T100 433,236 -70,285 -13.96 40,174 -25.31 0.9884
2025-02-05 2024-12-31 13F AECOM COM 00766T100 503,521 -140,604 -21.83 53,786 -19.14 1.1492
2024-11-04 2024-09-30 13F AECOM COM 00766T100 644,125 -6,250 -0.96 66,519 16.04 1.2463
2024-08-08 2024-06-30 13F AECOM COM 00766T100 650,375 -97,845 -13.08 57,324 -21.89 1.1008
2024-04-25 2024-03-31 13F AECOM COM 00766T100 748,220 -38,755 -4.92 73,385 0.89 1.2806
2024-02-14 2023-12-31 13F AECOM COM 00766T100 786,975 -84,243 -9.67 72,740 0.55 1.2220
2023-11-08 2023-09-30 13F AECOM COM 00766T100 871,218 6,065 0.70 72,346 -1.26 1.2230
2023-08-14 2023-06-30 13F AECOM COM 00766T100 865,153 184,541 27.11 73,270 27.67 1.0914
2023-05-08 2023-03-31 13F AECOM COM 00766T100 680,612 111,938 19.68 57,389 18.83 0.9273
2023-02-07 2022-12-31 13F AECOM COM 00766T100 568,674 -261,898 -31.53 48,297 -14.95 0.8822
2022-11-10 2022-09-30 13F AECOM COM 00766T100 830,572 -19,114 -2.25 56,786 2.47 1.1042
2022-08-03 2022-06-30 13F AECOM COM 00766T100 849,686 -69,571 -7.57 55,417 -21.51 0.9882
2022-05-13 2022-03-31 13F AECOM COM 00766T100 919,257 20,879 2.32 70,608 1.61 0.9949
2022-02-08 2021-12-31 13F AECOM COM 00766T100 898,378 91,946 11.40 69,490 36.45 0.9007
2021-10-13 2021-09-30 13F AECOM COM 00766T100 806,432 377,332 87.94 50,926 87.43 0.5939
2021-07-15 2021-06-30 13F AECOM COM 00766T100 429,100 429,100 27,171 0.3785
2016-05-18 2016-03-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 0 0 0 0.0000
2015-10-27 2015-09-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 0 0 0 0.0000
2015-08-24 2015-06-30 13F AECOM COM 00766T100 0 -664,297 -100.00 0 -100.00
2015-04-20 2015-03-31 13F AECOM COM 00766T100 664,297 664,297 0.00 20,567 1.6149
2014-10-22 2014-09-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 0 -342,195 -100.00 0 -100.00
2014-08-08 2014-06-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 342,195 123,248 56.29 10,800 55.80 0.8801
2014-05-05 2014-03-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 218,947 193,947 775.79 6,932 846.99 0.6011
2014-01-22 2013-12-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 25,000 -313,691 -92.62 732 -93.08 0.0647
2013-11-12 2013-09-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 338,691 299,491 764.01 10,574 754.12 0.8861
2013-08-01 2013-06-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 39,200 39,200 1,238 0.1112
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.