AECOM
MX ˙ BMV ˙ US00766T1007
SecurityMX:ACM / AECOM
InstitutionGAMMA Investing LLC
Latest Disclosed Ownership1,245 shares
Latest Disclosed Value $ 105,601
GAMMA Investing LLC reports 31.18% decrease in ownership of ACM / AECOM

On April 6, 2026 - GAMMA Investing LLC filed a 13F-HR form disclosing ownership of 1,245 shares of AECOM (MX:ACM) valued at $105,601 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 1,809 shares of AECOM. This represents a change in shares of -31.18% 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)
2026-04-06 2026-03-31 13F AECOM COM Common Stock 00766T100 1,245 -564 -31.18 106 -38.95 0.0049
2026-01-05 2025-12-31 13F AECOM COM Common Stock 00766T100 1,809 -468 -20.55 172 -42.09 0.0087
2025-10-02 2025-09-30 13F AECOM COM Common Stock 00766T100 2,277 406 21.70 297 40.76 0.0164
2025-07-14 2025-06-30 13F AECOM COM Common Stock 00766T100 1,871 282 17.75 211 43.54 0.0134
2025-04-15 2025-03-31 13F/A-1 AECOM COM Common Stock 00766T100 1,589 61 3.99 147 -9.82 0.0111
2025-04-07 2025-03-31 13F AECOM COM Common Stock 00766T100 147,348 145,820 2 0.0085
2025-01-03 2024-12-31 13F AECOM COM Common Stock 00766T100 1,528 399 35.34 163 40.52 0.0139
2024-10-04 2024-09-30 13F AECOM COM Common Stock 00766T100 1,129 241 117 0.0116
2024-10-07 2024-09-30 13F AECOM COM Common Stock 00766T100 1,129 241 27.14 117 48.72 0.0116
2024-07-02 2024-06-30 13F AECOM COM Common Stock 00766T100 888 284 47.02 78 32.20 0.0107
2024-04-05 2024-03-31 13F AECOM COM Common Stock 00766T100 604 211 53.69 59 73.53 0.0121
2024-02-01 2023-12-31 13F AECOM COM Common Stock 00766T100 393 393 35 0.0094
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.