AECOM
MX ˙ BMV ˙ US00766T1007
SecurityMX:ACM / AECOM
InstitutionRathbone Brothers plc
Latest Disclosed Ownership154,896 shares
Latest Disclosed Value $ 13,138,278
Rathbone Brothers plc reports 1.53% decrease in ownership of ACM / AECOM

On May 12, 2026 - Rathbone Brothers plc filed a 13F-HR form disclosing ownership of 154,896 shares of AECOM (MX:ACM) valued at $13,138,278 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 6, 2026 disclosing 157,304 shares of AECOM. This represents a change in shares of -1.53% 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)
2026-05-12 2026-03-31 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 154,896 -2,408 -1.53 13,138 -12.38 0.0561
2026-02-06 2025-12-31 13F/A-1 AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 157,304 -562 -0.36 14,996 -27.19 0.0594
2026-01-21 2025-12-31 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 157,304 -562 14,996 0.0594
2025-11-13 2025-09-30 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 157,866 8,179 5.46 20,597 21.92 0.0836
2025-08-07 2025-06-30 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 149,687 8,156 5.76 16,894 28.72 0.0729
2025-05-13 2025-03-31 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 141,531 43,006 43.65 13,124 24.71 0.0634
2025-02-13 2024-12-31 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 98,525 18,919 23.77 10,524 28.03 0.0510
2024-11-13 2024-09-30 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 79,606 42,629 115.29 8,221 152.22 0.0415
2024-08-09 2024-06-30 13F AECOM TECHNOLOGY CORP USD0.01 COM 00766T100 36,977 36,977 3,259 0.0178
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.