AECOM ACM
COM · Common Stock · CUSIP 00766T100 · ISIN US00766T1007
American multinational engineering firm
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($155.0m this quarter). Holder counts are more reliable. Shares outstanding: 128.5m as of 2026-05-08, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $84.84. Options: 9 managers hold calls ($12.5m notional), 9 hold puts ($13.8m).
Trends to Q1 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 371 |
| Q4 2022 | 411 |
| Q1 2023 | 451 |
| Q2 2023 | 452 |
| Q3 2023 | 456 |
| Q4 2023 | 508 |
| Q1 2024 | 517 |
| Q2 2024 | 511 |
| Q3 2024 | 526 |
| Q4 2024 | 568 |
| Q1 2025 | 571 |
| Q2 2025 | 633 |
| Q3 2025 | 640 |
| Q4 2025 | 646 |
| Q1 2026 | 624 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q2 2024 | 257 | 220 |
| Q3 2024 | 241 | 240 |
| Q4 2024 | 273 | 215 |
| Q1 2025 | 282 | 262 |
| Q2 2025 | 323 | 235 |
| Q3 2025 | 298 | 294 |
| Q4 2025 | 257 | 352 |
| Q1 2026 | 324 | 321 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2025 | $27.6m | $8.4m | 0.30 |
| Q3 2025 | $29.2m | $6.3m | 0.22 |
| Q4 2025 | $26.2m | $13.5m | 0.52 |
| Q1 2026 | $12.5m | $13.8m | 1.10 |
Biggest buyers
| FMR LLC | Added | +921.7k |
| AQR CAPITAL MANAGEMENT LLC | Added | +890.4k |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | Added | +883.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Added | +708.1k |
| D. E. Shaw & Co., Inc. | Added | +703.3k |
| LAZARD ASSET MANAGEMENT LLC | New | +644.7k |
| BlackRock, Inc. | Added | +553.4k |
| MILLENNIUM MANAGEMENT LLC | Added | +405.5k |
| Allianz Asset Management GmbH | Added | +376.9k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC | Added | +304.8k |
Biggest sellers
| FIRST TRUST ADVISORS LP | Reduced | -1.1m |
| Mariner, LLC | Reduced | -1.0m |
| ALLIANCEBERNSTEIN L.P. | Reduced | -958.4k |
| PANAGORA ASSET MANAGEMENT INC | Reduced | -937.3k |
| Findlay Park Partners LLP | Sold out | -838.0k |
| Pictet Asset Management Holding SA | Reduced | -794.0k |
| Invesco Ltd. | Reduced | -741.3k |
| BANK OF AMERICA CORP /DE/ | Reduced | -662.3k |
| Qube Research & Technologies Ltd | Reduced | -533.0k |
| HSBC HOLDINGS PLC | Reduced | -501.8k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | $4.6m54.2k shares |
| IMC-Chicago, LLC | Reduced | $3.4m39.6k shares |
| CITADEL ADVISORS LLC | Reduced | $1.7m19.6k shares |
| Walleye Trading LLC | Reduced | $1.1m13.1k shares |
| JANE STREET GROUP, LLC | Reduced | $644.6k7.6k shares |
| GROUP ONE TRADING LLC | Added | $492.0k5.8k shares |
| SIMPLEX TRADING, LLC | Reduced | $237.5k2.8k shares |
| Walleye Capital LLC | Reduced | $229.0k2.7k shares |
| UBS Group AG | Reduced | $186.6k2.2k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.1m71.8k shares |
| CITADEL ADVISORS LLC | Added | $2.4m27.9k shares |
| JANE STREET GROUP, LLC | Added | $2.1m25.3k shares |
| IMC-Chicago, LLC | New | $2.1m24.3k shares |
| Walleye Trading LLC | Added | $551.3k6.5k shares |
| Walleye Capital LLC | Added | $262.9k3.1k shares |
| SIMPLEX TRADING, LLC | New | $237.5k2.8k shares |
| GROUP ONE TRADING LLC | New | $76.3k900 shares |
| UBS Group AG | New | $17.0k200 shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| BlackRock, Inc. 13G · institution +0.3 pts · filed 2026-02-06 | 10.1% |
| PRIMECAP MANAGEMENT CO/CA/ 13G · institution -1.3 pts · filed 2025-08-14 | 7.2% |
| VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-29 | 5.2% |
Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-26; now reported by VANGUARD CAPITAL MANAGEMENT LLC)
Insider purchases and sales in Q1 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2024 | 0 | — | 1 | $671.3k | — |
| Q3 2024 | 0 | — | 1 | $3.3m | $3.3m |
| Q4 2024 | 0 | — | 3 | $17.5m | $17.5m |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 0 | — | 0 | — | — |
| Q3 2025 | 0 | — | 1 | $6.3m | $6.3m |
| Q4 2025 | 0 | — | 2 | $3.2m | $3.2m |
| Q1 2026 | 0 | — | 0 | — | — |
None reported in Q1 2026.
Holders, Q1 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.02% of their portfolio | 15.8m $1.3bn | Added +553.4k |
| PRIMECAP MANAGEMENT CO/CA/ 0.58% of their portfolio | 8.6m $733.4m | Reduced -20.2k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 5.8m $492.0m | First filing |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.02% of their portfolio | 5.5m $467.0m | First filing |
| STATE STREET CORP 0.01% of their portfolio | 5.0m $427.6m | Reduced -2.1k |
| Invesco Ltd. 0.03% of their portfolio | 3.6m $303.3m | Reduced -741.3k |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.06% of their portfolio | 3.5m $295.3m | Added +708.1k |
| FIRST TRUST ADVISORS LP 0.18% of their portfolio | 3.0m $256.7m | Reduced -1.1m |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC 0.79% of their portfolio | 2.9m $242.0m | Added +883.3k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 2.5m $208.9m | Added +25.2k |
| Pictet Asset Management Holding SA 0.19% of their portfolio | 2.1m $180.5m | Reduced -794.0k |
| FMR LLC 0.01% of their portfolio | 2.1m $178.8m | Added +921.7k |
| NORTHERN TRUST CORP 0.02% of their portfolio | 2.0m $166.7m | Reduced -70.3k |
| MORGAN STANLEY 0.01% of their portfolio | 1.7m $142.5m | Added +137.2k |
| UBS Group AG 0.02% of their portfolio | 1.4m $120.9m | Added +29.9k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.4m $117.7m | Added +82.9k |
| Impax Asset Management Group plc 0.82% of their portfolio | 1.4m $117.3m | Reduced -9.4k |
| Bank of New York Mellon Corp 0.02% of their portfolio | 1.3m $110.1m | Reduced -2.7k |
| Amundi 0.03% of their portfolio | 1.2m $104.0m | Added +170.9k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.09% of their portfolio | 1.2m $103.6m | Added +189.3k |
| D. E. Shaw & Co., Inc. 0.07% of their portfolio | 1.1m $90.1m | Added +703.3k |
| AQR CAPITAL MANAGEMENT LLC 0.04% of their portfolio | 1.1m $89.6m | Added +890.4k |
| LORD, ABBETT & CO. LLC 0.28% of their portfolio | 1.0m $85.2m | Added +97.1k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.11% of their portfolio | 969.0k $82.2m | Added +65.6k |
| Ninety One UK Ltd 0.19% of their portfolio | 962.4k $81.6m | Reduced -330.3k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 928.9k $78.8m | Added +20.7k |
| VANGUARD FIDUCIARY TRUST CO 0.02% of their portfolio | 802.7k $68.1m | First filing |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 797.7k $67.7m | Reduced -169.5k |
| MILLENNIUM MANAGEMENT LLC 0.05% of their portfolio | 784.0k $66.5m | Added +405.5k |
| AMERIPRISE FINANCIAL INC 0.01% of their portfolio | 732.2k $62.1m | Added +174.5k |
| DekaBank Deutsche Girozentrale 0.10% of their portfolio | 722.4k $62.3m | Unchanged |
| CITADEL ADVISORS LLC 0.04% of their portfolio | 714.7k $60.6m | Added +199.9k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 708.5k $59.0m | Added +96.5k |
| PFA Pension, Forsikringsaktieselskab 0.18% of their portfolio | 697.3k $59.1m | Added +348 |
| DEUTSCHE BANK AG\ 0.02% of their portfolio | 686.3k $58.2m | Reduced -203.1k |
| HSBC HOLDINGS PLC 0.03% of their portfolio | 678.6k $57.6m | Reduced -501.8k |
| RENAISSANCE TECHNOLOGIES LLC 0.09% of their portfolio | 662.3k $56.2m | Added +24.7k |
| LAZARD ASSET MANAGEMENT LLC 0.09% of their portfolio | 644.7k $54.7m | New |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 620.6k $52.6m | Reduced -662.3k |
| BARCLAYS PLC 0.02% of their portfolio | 613.7k $52.1m | Added +185.7k |
| NORDEA INVESTMENT MANAGEMENT AB 0.05% of their portfolio | 593.9k $49.8m | Reduced -40.9k |
| Sandhill Capital Partners LLC 4.27% of their portfolio | 585.5k $49.7m | Added +113.3k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.19% of their portfolio | 564.6k $47.9m | Added +304.8k |
| ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio | 558.2k $53.2m | Reduced -958.4k |
| Nuveen, LLC 0.01% of their portfolio | 508.3k $43.1m | Added +169.0k |
| TWO SIGMA INVESTMENTS, LP 0.04% of their portfolio | 506.6k $43.0m | Added +119.4k |
| Qube Research & Technologies Ltd 0.05% of their portfolio | 441.9k $37.5m | Reduced -533.0k |
| Allianz Asset Management GmbH 0.04% of their portfolio | 415.3k $35.2m | Added +376.9k |
| Legal & General Group Plc 0.01% of their portfolio | 405.3k $34.4m | Reduced -58.0k |
| Swiss National Bank 0.02% of their portfolio | 386.9k $32.8m | Added +23.9k |
| Robeco Schweiz AG 0.67% of their portfolio | 371.9k $31.5m | Reduced -8.9k |
| Russell Investments Group, Ltd. 0.03% of their portfolio | 368.6k $30.8m | Added +87.2k |
| RHUMBLINE ADVISERS 0.03% of their portfolio | 351.2k $29.8m | Added +738 |
| PANAGORA ASSET MANAGEMENT INC 0.11% of their portfolio | 344.4k $29.2m | Reduced -937.3k |
| Verition Fund Management LLC 0.28% of their portfolio | 339.6k $28.8m | Added +130.1k |
| Retirement Systems of Alabama 0.10% of their portfolio | 339.3k $28.8m | Reduced -457 |
| FIL Ltd 0.02% of their portfolio | 317.2k $26.9m | Reduced -142.2k |
| PRUDENTIAL FINANCIAL INC 0.03% of their portfolio | 312.9k $26.5m | Added +272.3k |
| CI INVESTMENTS INC. 0.13% of their portfolio | 311.0k $26.4m | Added +212 |
| Rathbones Group PLC 0.05% of their portfolio | 309.8k $26.3m | Reduced -4.8k |
| FLPUTNAM INVESTMENT MANAGEMENT CO 0.38% of their portfolio | 302.0k $25.6m | Added +43.3k |
| SG Americas Securities, LLC 0.03% of their portfolio | 295.5k $25.1m | Added +211.3k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 288.5k $24.5m | Added +3.7k |
| Vest Financial, LLC 0.29% of their portfolio | 288.2k $24.4m | Added +26.4k |
| HENNESSY ADVISORS INC 0.88% of their portfolio | 285.7k $24.2m | Reduced -29.9k |
| Vinva Investment Management Ltd 0.29% of their portfolio | 282.7k $23.6m | Added +236.8k |
| Sumitomo Mitsui Trust Group, Inc. 0.02% of their portfolio | 274.0k $23.2m | Added +537 |
| Balyasny Asset Management L.P. 0.04% of their portfolio | 267.6k $22.7m | New |
| INTECH INVESTMENT MANAGEMENT LLC 0.22% of their portfolio | 258.9k $22.0m | Added +104.9k |
| California Public Employees Retirement System 0.01% of their portfolio | 256.4k $21.7m | Reduced -28.8k |
| Robeco Institutional Asset Management B.V. 0.03% of their portfolio | 255.0k $21.6m | Added +144.0k |
| FRANKLIN RESOURCES INC 0.01% of their portfolio | 244.8k $20.8m | Added +162.3k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 241.0k $20.4m | Reduced -8.1k |
| Quantinno Capital Management LP 0.03% of their portfolio | 240.9k $20.4m | Added +145.3k |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.01% of their portfolio | 238.6k $20.2m | Added +218.9k |
| TUDOR INVESTMENT CORP ET AL 0.11% of their portfolio | 232.1k $19.7m | Added +138.1k |
| DANSKE BANK A/S 0.05% of their portfolio | 225.8k $19.2m | Added +51.1k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 217.6k $18.5m | Added +23.5k |
| Mariner, LLC 0.02% of their portfolio | 205.7k $17.4m | Reduced -1.0m |
| BNP PARIBAS FINANCIAL MARKETS 0.01% of their portfolio | 201.7k $17.1m | Reduced -17.8k |
| Swiss Life Asset Management Ltd 0.08% of their portfolio | 193.0k $16.4m | Added +64.0k |
| Bridgewater Associates, LP 0.07% of their portfolio | 183.2k $15.5m | Added +140.5k |
| Man Group plc 0.03% of their portfolio | 182.6k $15.5m | Added +121.7k |
| WORLDQUANT MILLENNIUM ADVISORS LLC 0.06% of their portfolio | 179.8k $15.3m | New |
| BANK OF NOVA SCOTIA 0.02% of their portfolio | 158.9k $13.5m | Added +73.1k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.02% of their portfolio | 156.5k $13.3m | Added +6.3k |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.01% of their portfolio | 148.0k $12.6m | Reduced -149.6k |
| Lombard Odier Asset Management (Europe) Ltd 0.67% of their portfolio | 144.3k $12.2m | Reduced -28.3k |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 141.5k $12.0m | Added +8.5k |
| Mitsubishi UFJ Asset Management Co., Ltd. 0.01% of their portfolio | 140.4k $11.9m | Added +10.9k |
| Delaney Capital Management Ltd. 1.90% of their portfolio | 139.1k $11.8m | Added +37.0k |
| Ninety One North America, Inc. 0.52% of their portfolio | 137.0k $11.6m | Reduced -783 |
| Gotham Asset Management, LLC 0.04% of their portfolio | 134.8k $11.4m | Added +2.3k |
| Aquatic Capital Management LLC 0.32% of their portfolio | 133.2k $11.3m | Added +107.5k |
| KLP KAPITALFORVALTNING AS 0.04% of their portfolio | 130.7k $11.1m | Unchanged |
| CITIGROUP INC 0.01% of their portfolio | 129.6k $11.0m | Reduced -62.6k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.08% of their portfolio | 128.1k $10.9m | Unchanged |
| ACADIAN ASSET MANAGEMENT LLC 0.02% of their portfolio | 128.0k $10.9m | New |
| Squarepoint Ops LLC 0.02% of their portfolio | 124.1k $10.5m | Reduced -9.8k |
| MIROVA 0.43% of their portfolio | 123.6k $10.5m | New |