Aecom Technology Corporation (ACM)
Industrials
Engineering & Construction
72.40 $
+0.9%
vs. previous close
Closing price · As of: 31. Jul 2026
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%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
93.8%
Insiders
Share of the stock held by the executives, founders and major shareholders of the company itself.
0.5%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
99.4%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
6.2%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
129Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 12.26 | 15,760,364 | +3.6 | 03/31/2026 |
| Vanguard Group Inc | 9.56 | 12,285,802 | -1.8 | 12/31/2025 |
| PRIMECAP Management Company | 6.73 | 8,647,073 | -0.2 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.51 | 5,800,366 | +0.0 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 4.28 | 5,506,279 | +0.0 | 03/31/2026 |
| State Street Corp | 3.92 | 5,041,460 | +0.0 | 03/31/2026 |
| Amvescap Plc. | 2.78 | 3,575,351 | -17.2 | 03/31/2026 |
| UBS Asset Mgmt Americas Inc | 2.71 | 3,481,963 | +25.5 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.41 | 4,385,984 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.20 | 4,115,693 | +0.2 | 04/30/2026 |
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: July 31, 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.