Aecom Technology Corporation
Ownership
Ownership Structure
Who owns Aecom Technology Corporation (ACM)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.4% of the shares are freely tradable; institutional investors hold 93.8%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 11.17 | 14,379,638 | -8.8 | 06/30/2026 |
| PRIMECAP Management Company | 6.83 | 8,787,043 | +1.6 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.51 | 5,808,042 | +0.1 | 06/30/2026 |
| Barrow Hanley Mewhinney & Strauss LLC | 4.27 | 5,497,153 | +92.7 | 06/30/2026 |
| Vanguard Portfolio Management, LLC | 4.26 | 5,486,637 | -0.4 | 06/30/2026 |
| State Street Corp | 3.19 | 4,106,098 | -18.6 | 06/30/2026 |
| FMR Inc | 2.92 | 3,758,192 | +78.3 | 06/30/2026 |
| UBS Asset Mgmt Americas Inc | 2.77 | 3,565,323 | +2.4 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.56 | 4,584,195 | +0.0 | 09/30/2026 |
| Vanguard MStar Total Stk Mkt Idx Invest | 3.18 | 4,094,981 | +0.3 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.