AECOM
MX ˙ BMV ˙ US00766T1007
SecurityMX:ACM / AECOM
InstitutionHennessy Advisors Inc
Latest Disclosed Ownership285,700 shares
Latest Disclosed Value $ 24,233,074
Hennessy Advisors Inc reports 9.47% decrease in ownership of ACM / AECOM

On April 21, 2026 - Hennessy Advisors Inc filed a 13F-HR form disclosing ownership of 285,700 shares of AECOM (MX:ACM) valued at $24,233,074 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 315,600 shares of AECOM. This represents a change in shares of -9.47% 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 285,700 -29,900 -9.47 24,233 -19.45 0.8751
2026-01-27 2025-12-31 13F AECOM COM 00766T100 315,600 -17,600 -5.28 30,086 -30.79 1.0662
2025-10-20 2025-09-30 13F AECOM COM 00766T100 333,200 333,200 43,473 1.5007
2021-01-25 2020-12-31 13F AECOM COM 00766T100 0 -241,900 -100.00 0 -100.00
2020-10-16 2020-09-30 13F AECOM COM 00766T100 241,900 -15,900 -6.17 10,121 4.47 0.7041
2020-07-20 2020-06-30 13F AECOM COM 00766T100 257,800 -21,200 -7.60 9,688 16.33 0.6747
2020-04-14 2020-03-31 13F AECOM COM 00766T100 279,000 -23,800 -7.86 8,328 -36.23 0.6259
2020-01-14 2019-12-31 13F AECOM COM 00766T100 302,800 302,800 13,060 0.6648
2016-04-21 2016-03-31 13F AECOM TECHNOLOGY CORP DELAWARE COM 00766T100 0 0 0 0.0000
2016-01-22 2015-12-31 13F AECOM COM 00766T100 0 -916,000 -100.00 0 -100.00
2015-10-20 2015-09-30 13F AECOM COM 00766T100 916,000 391,800 74.74 25,199 45.31 0.7580
2015-08-04 2015-06-30 13F AECOM COM 00766T100 524,200 109,900 26.53 17,341 35.81 0.5194
2015-04-21 2015-03-31 13F AECOM COM 00766T100 414,300 71,800 20.96 12,769 22.76 0.3675
2015-01-22 2014-12-31 13F AECOM TECHNOLOGY CORP DELAWARE COM 00766T100 342,500 342,500 10,402 0.2945
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.