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 ($170.4m this quarter). Holder counts are more reliable. Shares outstanding: 128.7m as of 2026-08-07, 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 ≈ $69.99. Options: 9 managers hold calls ($19.9m notional), 9 hold puts ($30.1m).
Trends to Q2 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 |
| Q2 2026 | 575 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| 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 |
| Q2 2026 | 259 | 362 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q3 2025 | $29.2m | $6.3m | 0.22 |
| Q4 2025 | $26.2m | $13.5m | 0.52 |
| Q1 2026 | $12.5m | $13.8m | 1.10 |
| Q2 2026 | $19.9m | $30.1m | 1.51 |
Biggest buyers
| BARROW HANLEY MEWHINNEY & STRAUSS LLC | Added | +2.6m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Added | +1.9m |
| Qube Research & Technologies Ltd | Added | +1.7m |
| FMR LLC | Added | +1.7m |
| CIBC Bancorp USA Inc. | Added | +917.0k |
| Impax Asset Management Group plc | Added | +745.7k |
| AQR CAPITAL MANAGEMENT LLC | Added | +734.2k |
| D. E. Shaw & Co., Inc. | Added | +648.9k |
| MILLENNIUM MANAGEMENT LLC | Added | +537.3k |
| JANE STREET GROUP, LLC | Added | +531.3k |
Biggest sellers
| Pictet Asset Management Holding SA | Reduced | -2.0m |
| BlackRock, Inc. | Reduced | -1.4m |
| LORD, ABBETT & CO. LLC | Sold out | -1.0m |
| STATE STREET CORP | Reduced | -935.4k |
| NORTHERN TRUST CORP | Reduced | -838.8k |
| LAZARD ASSET MANAGEMENT LLC | Reduced | -633.5k |
| FIRST TRUST ADVISORS LP | Reduced | -580.4k |
| NORDEA INVESTMENT MANAGEMENT AB | Reduced | -525.2k |
| AMERIPRISE FINANCIAL INC | Reduced | -385.5k |
| Invesco Ltd. | Reduced | -383.5k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.2m89.4k shares |
| IMC-Chicago, LLC | Added | $3.9m56.3k shares |
| CITADEL ADVISORS LLC | Added | $3.8m54.9k shares |
| JANE STREET GROUP, LLC | Added | $2.8m39.6k shares |
| SIMPLEX TRADING, LLC | Added | $1.1m16.1k shares |
| GROUP ONE TRADING LLC | Added | $1.1m15.8k shares |
| Walleye Trading LLC | Reduced | $453.7k6.5k shares |
| Walleye Capital LLC | Added | $335.0k4.8k shares |
| Twin Tree Management, LP | New | $146.6k2.1k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $10.7m152.7k shares |
| JANE STREET GROUP, LLC | Added | $7.6m108.6k shares |
| IMC-Chicago, LLC | Added | $4.9m69.8k shares |
| CITADEL ADVISORS LLC | Added | $2.8m40.3k shares |
| GROUP ONE TRADING LLC | Added | $2.4m33.9k shares |
| Walleye Trading LLC | Added | $537.5k7.7k shares |
| Walleye Capital LLC | Added | $523.5k7.5k shares |
| TWO SIGMA INVESTMENTS, LP | New | $425.8k6.1k shares |
| SIMPLEX TRADING, LLC | Added | $328.1k4.7k 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 since 1 Apr 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 |
|---|---|---|---|---|---|
| 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 | — | — |
| Q2 2026 | 3 | $699.4k | 0 | — | — |
| Q3 2026 | 0 | — | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-06-16 | Poloni Lara PRESIDENT | Bought | $298.3k4.2k shares |
| 2026-05-14 | Rudd Troy CHIEF EXECUTIVE OFFICER, director | Bought | $300.1k4.2k shares |
| 2026-05-14 | Kapoor Gaurav CHIEF FINANCIAL OFFICER (PAO) | Bought | $101.0k1.4k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| BlackRock, Inc. 0.01% of their portfolio | 14.4m $1.0bn | Reduced -1.4m |
| PRIMECAP MANAGEMENT CO/CA/ 0.36% of their portfolio | 8.8m $613.3m | Added +140.0k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.01% of their portfolio | 5.8m $405.4m | Added +7.7k |
| BARROW HANLEY MEWHINNEY & STRAUSS LLC 1.16% of their portfolio | 5.5m $383.7m | Added +2.6m |
| VANGUARD PORTFOLIO MANAGEMENT LLC 0.02% of their portfolio | 5.5m $383.0m | Reduced -19.6k |
| STATE STREET CORP 0.01% of their portfolio | 4.1m $286.6m | Reduced -935.4k |
| FMR LLC 0.01% of their portfolio | 3.8m $262.3m | Added +1.7m |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.05% of their portfolio | 3.6m $248.9m | Added +83.4k |
| Invesco Ltd. 0.02% of their portfolio | 3.2m $222.8m | Reduced -383.5k |
| FIRST TRUST ADVISORS LP 0.10% of their portfolio | 2.4m $170.7m | Reduced -580.4k |
| GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio | 2.4m $170.8m | Reduced -23.7k |
| Impax Asset Management Group plc 0.97% of their portfolio | 2.1m $148.6m | Added +745.7k |
| Qube Research & Technologies Ltd 0.16% of their portfolio | 2.1m $147.9m | Added +1.7m |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.06% of their portfolio | 2.1m $146.4m | Added +1.9m |
| NORGES BANK 0.01% of their portfolio | 1.9m $129.3m | Not comparable |
| AQR CAPITAL MANAGEMENT LLC 0.04% of their portfolio | 1.8m $124.0m | Added +734.2k |
| D. E. Shaw & Co., Inc. 0.07% of their portfolio | 1.7m $119.4m | Added +648.9k |
| UBS Group AG 0.02% of their portfolio | 1.7m $118.3m | Added +269.8k |
| DIMENSIONAL FUND ADVISORS LP 0.02% of their portfolio | 1.6m $114.5m | Added +253.2k |
| MORGAN STANLEY 0.01% of their portfolio | 1.6m $114.4m | Reduced -41.0k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.07% of their portfolio | 1.4m $94.4m | Added +131.5k |
| MILLENNIUM MANAGEMENT LLC 0.06% of their portfolio | 1.3m $92.2m | Added +537.3k |
| Amundi 0.02% of their portfolio | 1.3m $91.7m | Added +86.2k |
| Bank of New York Mellon Corp 0.01% of their portfolio | 1.1m $79.5m | Reduced -159.2k |
| NORTHERN TRUST CORP 0.01% of their portfolio | 1.1m $78.6m | Reduced -838.8k |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. 0.09% of their portfolio | 1.1m $73.3m | Added +81.7k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.01% of their portfolio | 968.7k $67.6m | Added +39.8k |
| CIBC Bancorp USA Inc. 0.08% of their portfolio | 925.2k $64.6m | Added +917.0k |
| TWO SIGMA INVESTMENTS, LP 0.05% of their portfolio | 875.6k $61.1m | Added +369.0k |
| VANGUARD FIDUCIARY TRUST CO 0.01% of their portfolio | 812.6k $56.7m | Added +9.9k |
| GOLDMAN SACHS GROUP INC 0.01% of their portfolio | 770.3k $53.8m | Reduced -27.4k |
| Ninety One UK Ltd 0.12% of their portfolio | 752.3k $52.5m | Reduced -210.0k |
| RENAISSANCE TECHNOLOGIES LLC 0.07% of their portfolio | 746.9k $52.1m | Added +84.6k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 742.3k $51.8m | Added +121.7k |
| BARCLAYS PLC 0.02% of their portfolio | 728.2k $50.8m | Added +114.5k |
| DekaBank Deutsche Girozentrale 0.10% of their portfolio | 722.4k $61.0m | Unchanged |
| CITADEL ADVISORS LLC 0.03% of their portfolio | 677.8k $47.3m | Reduced -36.9k |
| TUDOR INVESTMENT CORP ET AL 0.19% of their portfolio | 669.9k $46.8m | Added +437.8k |
| PFA Pension, Forsikringsaktieselskab 0.11% of their portfolio | 618.1k $43.1m | Reduced -79.3k |
| HSBC HOLDINGS PLC 0.02% of their portfolio | 567.7k $39.3m | Reduced -110.9k |
| ALLIANCEBERNSTEIN L.P. 0.02% of their portfolio | 556.9k $47.2m | Reduced -1.4k |
| SG Americas Securities, LLC 0.02% of their portfolio | 545.4k $38.1m | Added +249.9k |
| JANE STREET GROUP, LLC 0.02% of their portfolio | 534.6k $37.3m | Added +531.3k |
| PRUDENTIAL FINANCIAL INC 0.04% of their portfolio | 512.7k $35.8m | Added +199.8k |
| Squarepoint Ops LLC 0.07% of their portfolio | 497.6k $34.7m | Added +373.5k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 488.3k $34.5m | Reduced -220.3k |
| Perpetual Ltd 0.48% of their portfolio | 484.7k $33.8m | New |
| BNP PARIBAS FINANCIAL MARKETS 0.02% of their portfolio | 475.1k $33.2m | Added +273.4k |
| Gotham Asset Management, LLC 0.07% of their portfolio | 454.6k $31.7m | Added +319.8k |
| Nuveen, LLC 0.01% of their portfolio | 443.4k $30.9m | Reduced -65.0k |
| Sandhill Capital Partners LLC 2.35% of their portfolio | 414.7k $28.9m | Reduced -170.8k |
| HRT FINANCIAL LP 0.07% of their portfolio | 412.8k $28.8m | Added +383.5k |
| LETKO, BROSSEAU & ASSOCIATES INC 0.40% of their portfolio | 390.1k $27.2m | New |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND 0.04% of their portfolio | 363.0k $25.3m | Added +349.3k |
| WORLDQUANT MILLENNIUM ADVISORS LLC 0.08% of their portfolio | 353.0k $24.6m | Added +173.1k |
| Verition Fund Management LLC 0.17% of their portfolio | 349.5k $24.4m | Added +9.9k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 346.7k $24.2m | Reduced -385.5k |
| Robeco Schweiz AG 0.39% of their portfolio | 345.6k $24.1m | Reduced -26.3k |
| DEUTSCHE BANK AG\ 0.01% of their portfolio | 338.1k $23.6m | Reduced -348.2k |
| Allianz Asset Management GmbH 0.03% of their portfolio | 337.2k $28.6m | Reduced -78.0k |
| BANK OF NOVA SCOTIA 0.03% of their portfolio | 325.3k $22.7m | Added +166.4k |
| RHUMBLINE ADVISERS 0.02% of their portfolio | 325.3k $22.7m | Reduced -26.0k |
| Retirement Systems of Alabama 0.07% of their portfolio | 313.7k $21.9m | Reduced -25.6k |
| VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.09% of their portfolio | 306.3k $21.4m | Reduced -258.3k |
| Robeco Institutional Asset Management B.V. 0.03% of their portfolio | 303.0k $21.2m | Added +48.1k |
| FIL Ltd 0.02% of their portfolio | 301.6k $21.1m | Reduced -15.6k |
| PRINCIPAL FINANCIAL GROUP INC 0.01% of their portfolio | 291.8k $20.4m | Added +3.3k |
| FLPUTNAM INVESTMENT MANAGEMENT CO 0.24% of their portfolio | 287.1k $20.0m | Reduced -14.9k |
| HENNESSY ADVISORS INC 0.64% of their portfolio | 285.7k $19.9m | Unchanged |
| ING GROEP NV 0.09% of their portfolio | 275.2k $19.2m | New |
| JUPITER ASSET MANAGEMENT LTD 0.09% of their portfolio | 267.0k $18.6m | Added +258.6k |
| California Public Employees Retirement System 0.01% of their portfolio | 265.7k $18.5m | Added +9.3k |
| Swiss National Bank 0.01% of their portfolio | 259.7k $18.1m | Reduced -127.2k |
| Trexquant Investment LP 0.10% of their portfolio | 239.3k $16.7m | Added +175.0k |
| KBC Group NV 0.03% of their portfolio | 220.6k $15.4m | Added +99.0k |
| TD Asset Management Inc 0.01% of their portfolio | 200.0k $14.0m | Added +185.3k |
| Legal & General Group Plc 0.00% of their portfolio | 192.0k $13.4m | Reduced -213.4k |
| Vest Financial, LLC 0.14% of their portfolio | 191.6k $13.4m | Reduced -96.7k |
| INTECH INVESTMENT MANAGEMENT LLC 0.12% of their portfolio | 191.2k $13.3m | Reduced -67.8k |
| SEI INVESTMENTS CO 0.01% of their portfolio | 190.1k $13.3m | Added +119.9k |
| TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY 0.09% of their portfolio | 181.3k $12.7m | Added +53.2k |
| PDT Partners, LLC 0.63% of their portfolio | 172.7k $12.1m | New |
| Swiss Life Asset Management Ltd 0.05% of their portfolio | 170.0k $11.9m | Reduced -23.0k |
| Bridgewater Associates, LP 0.05% of their portfolio | 163.4k $11.4m | Reduced -19.8k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.02% of their portfolio | 159.0k $11.1m | Added +2.6k |
| VALUE HOLDINGS MANAGEMENT CO. LLC 1.80% of their portfolio | 154.6k $10.8m | Added +72.6k |
| Pictet Asset Management Holding SA 0.01% of their portfolio | 152.3k $10.6m | Reduced -2.0m |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio | 149.7k $10.5m | Reduced -91.3k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.01% of their portfolio | 146.1k $10.2m | Added +104.3k |
| Delaney Capital Management Ltd. 1.56% of their portfolio | 141.5k $9.9m | Added +2.5k |
| MIROVA 0.36% of their portfolio | 140.0k $9.8m | Added +16.4k |
| Boston Partners 0.01% of their portfolio | 138.4k $9.7m | Added +19.2k |
| Running Oak Capital LLC 1.59% of their portfolio | 133.7k $9.3m | New |
| STATE OF WISCONSIN INVESTMENT BOARD 0.02% of their portfolio | 133.3k $9.3m | Added +56.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 132.8k $9.3m | Reduced -84.8k |
| FORA Capital, LLC 0.63% of their portfolio | 131.9k $9.2m | Added +94.1k |
| Engineers Gate Manager LP 0.12% of their portfolio | 129.4k $9.0m | Added +19.9k |
| NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio | 120.8k $8.4m | Added +475 |
| Quantinno Capital Management LP 0.01% of their portfolio | 119.6k $8.3m | Reduced -121.3k |
| Guinness Asset Management LTD 0.14% of their portfolio | 119.5k $8.3m | Reduced -3.1k |