AECOM
ACM · NYSE
Who owns ACM
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 40.2% of ACM’s shares.
- BlackRock Institutional Trust Company, N.A.8.9%
- PRIMECAP Management Company6.8%
- Vanguard Capital Management, LLC4.5%
- Barrow Hanley Global Investors4.3%
- Next 6 largest institutions15.7%
- All other shareholders59.8%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 11.39M | 8.86% |
| PRIMECAP Management Company | 8.79M | 6.84% |
| Vanguard Capital Management, LLC | 5.81M | 4.52% |
| Barrow Hanley Global Investors | 5.50M | 4.28% |
| Vanguard Portfolio Management, LLC | 5.49M | 4.27% |
| State Street Investment Management (US) | 4.11M | 3.19% |
| Fidelity Management & Research Company LLC | 3.63M | 2.82% |
| First Trust Advisors L.P. | 2.45M | 1.90% |
| Geode Capital Management, L.L.C. | 2.45M | 1.90% |
| Impax Asset Management Ltd. | 2.13M | 1.66% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 4.50M | 3.50% |
| Vanguard Total Stock Market Index Fund | 4.09M | 3.18% |
| Vanguard Capital Opportunity Fund | 3.43M | 2.67% |
| Vanguard Small-Cap Index Fund | 2.96M | 2.30% |
| Vanguard Small-Cap Value Index Fund | 1.88M | 1.46% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $699.39K (3 trades) of ACM on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Poloni Lara | Buy | 4.22K | $298.34K |
| Kapoor Gaurav | Buy | 1.42K | $100.99K |
| Rudd Troy | Buy | 4.22K | $300.06K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Alan ArmstrongSenator | Sale (Full) | $15K–$50K | Mar 27, 2026 |
Short interest
Settled Sep 30, 2026
- Shares short
- 5.94M
- Days to cover
- 3.25
- % of shares outstanding
- 4.62%
- Average daily volume
- 1.83M
- Change since last report
- −6.3%
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