AECOM
MX ˙ BMV ˙ US00766T1007
SecurityMX:ACM / AECOM
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership662,277 shares
Latest Disclosed Value $ 56,174,335
Renaissance Technologies Llc reports 3.87% increase in ownership of ACM / AECOM

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 662,277 shares of AECOM (MX:ACM) valued at $56,174,335 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 637,577 shares of AECOM. This represents a change in shares of 3.87% 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)
2026-05-14 2026-03-31 13F AECOM COM 00766T100 662,277 24,700 3.87 56,174 -7.58 0.0879
2026-02-12 2025-12-31 13F AECOM COM 00766T100 637,577 187,600 41.69 60,780 3.53 0.0943
2025-11-13 2025-09-30 13F AECOM COM 00766T100 449,977 187,250 71.27 58,708 98.00 0.0775
2025-08-13 2025-06-30 13F AECOM COM 00766T100 262,727 -83,650 -24.15 29,651 -7.68 0.0394
2025-05-14 2025-03-31 13F AECOM COM 00766T100 346,377 19,900 6.10 32,120 -7.90 0.0486
2025-02-13 2024-12-31 13F AECOM COM 00766T100 326,477 -198,700 -37.83 34,874 -35.70 0.0516
2024-11-13 2024-09-30 13F AECOM COM 00766T100 525,177 198,100 60.57 54,235 88.13 0.0816
2024-08-09 2024-06-30 13F AECOM COM 00766T100 327,077 16,100 5.18 28,829 95,993.33 0.0489
2024-05-13 2024-03-31 13F AECOM COM 00766T100 310,977 48,400 18.43 31 25.00 0.0479
2024-02-13 2023-12-31 13F AECOM COM 00766T100 262,577 251,000 2,168.09 24 0.0376
2023-11-14 2023-09-30 13F AECOM COM 00766T100 11,577 11,577 1 0.0016
2023-08-11 2023-06-30 13F AECOM COM 00766T100 0 -66,677 -100.00 0 -100.00
2023-05-12 2023-03-31 13F AECOM COM 00766T100 66,677 -191,300 -74.15 6 -76.19 0.0075
2023-02-13 2022-12-31 13F AECOM COM 00766T100 257,977 257,977 22 0.0300
2022-08-12 2022-06-30 13F AECOM COM 00766T100 0 -144,077 -100.00 0 -100.00
2022-05-13 2022-03-31 13F AECOM COM 00766T100 144,077 34,900 31.97 11,067 31.05 0.0130
2022-02-11 2021-12-31 13F AECOM COM 00766T100 109,177 -67,100 -38.07 8,445 -24.14 0.0105
2021-11-12 2021-09-30 13F AECOM COM 00766T100 176,277 -278,900 -61.27 11,132 -61.38 0.0144
2021-08-13 2021-06-30 13F AECOM COM 00766T100 455,177 119,800 35.72 28,822 34.05 0.0360
2021-05-13 2021-03-31 13F AECOM COM 00766T100 335,377 -482,513 -58.99 21,501 -47.19 0.0267
2021-02-10 2020-12-31 13F AECOM COM 00766T100 817,890 -830,125 -50.37 40,715 -40.95 0.0442
2020-11-13 2020-09-30 13F AECOM COM 00766T100 1,648,015 -1,517,100 -47.93 68,953 -42.03 0.0688
2020-08-13 2020-06-30 13F AECOM COM 00766T100 3,165,115 -1,337,900 -29.71 118,945 -11.51 0.1027
2020-05-14 2020-03-31 13F AECOM COM 00766T100 4,503,015 1,323,538 41.63 134,415 -1.98 0.1305
2020-02-13 2019-12-31 13F AECOM COM 00766T100 3,179,477 1,568,200 97.33 137,131 126.59 0.1054
2019-11-13 2019-09-30 13F AECOM COM 00766T100 1,611,277 631,100 64.39 60,520 63.13 0.0512
2019-08-12 2019-06-30 13F AECOM COM 00766T100 980,177 571,777 140.00 37,100 206.18 0.0327
2019-05-14 2019-03-31 13F AECOM COM 00766T100 408,400 408,400 12,117 0.0110
2019-02-12 2018-12-31 13F AECOM COM 00766T100 0 -233,077 -100.00 0 -100.00
2018-11-13 2018-09-30 13F AECOM COM 00766T100 233,077 233,077 7,612 0.0078
2018-05-14 2018-03-31 13F AECOM COM 00766T100 0 -245,477 -100.00 0 -100.00
2018-02-13 2017-12-31 13F AECOM COM 00766T100 245,477 -21,400 -8.02 9,119 -7.18 0.0101
2017-11-13 2017-09-30 13F AECOM COM 00766T100 266,877 207,133 346.70 9,824 408.49 0.0116
2017-08-11 2017-06-30 13F AECOM COM 00766T100 59,744 -332,933 -84.79 1,932 -86.18 0.0025
2017-05-12 2017-03-31 13F AECOM COM 00766T100 392,677 -430,300 -52.29 13,975 -53.30 0.0195
2017-02-13 2016-12-31 13F AECOM COM 00766T100 822,977 822,977 29,923 0.0473
2016-02-11 2015-12-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 0 0 0 0.0000
2015-05-13 2015-03-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 0 -333,577 -100.00 0 -100.00
2015-02-13 2014-12-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 333,577 -61,223 -15.51 10,131 -23.97 0.0245
2014-11-12 2014-09-30 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 394,800 29,700 8.13 13,325 24.01 0.0365
2014-02-14 2013-12-31 13F AECOM TECHNOLOGY CORP DELAWA COM 00766T100 365,100 365,100 10,745 0.0257
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.