ACM
Aecom · Industrials · Engineering & Construction
Momentum inputs (comparable managers):
holder breadth -7.1% ·
share flow -5.1% ·
net new positions -7.7%
— formula
Broad distribution — falling shares and fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 144 | -6 | 91.38M | $6.39B | +7 | −12 |
| Q1 2026 | 152 | -1 | 88.46M | $7.51B | +8 | −10 |
| Q4 2025 | 153 | +1 | 97.15M | $9.26B | +2 | — |
| Q3 2025 | 21 | 0 | 50.79M | $6.63B | +2 | −3 |
| Q2 2025 | 19 | 0 | 50.24M | $5.67B | — | — |
| Q1 2025 | 16 | +2 | 21.16M | $1.96B | +2 | — |
| Q4 2024 | 14 | 0 | 22.63M | $2.42B | +1 | −1 |
| Q3 2024 | 13 | -1 | 19.01M | $1.96B | +1 | −2 |
| Q2 2024 | 14 | — | 20.04M | $1.77B | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | PRIMECAP Management ✦ | 12.51M | -3.9% | $1.29B | 0.9% | ▼ Trim | 2 | SEC ↗ |
| 2 | Geode Capital Management ✦ (passive) | 2.27M | +0.6% | $233.92M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | Geode Capital Management ✦ (passive) | 2.27M | +0.6% | $233.92M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Norges Bank ✦ (passive) | 1.81M | -0.1% | $186.57M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 5 | AQR Capital Management ✦ | 624.82K | +72.2% | $64.17M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 6 | AQR Capital Management ✦ | 624.82K | +72.2% | $64.17M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 7 | AQR Capital Management ✦ | 624.82K | +72.2% | $64.17M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 8 | AQR Capital Management ✦ | 624.82K | +72.2% | $64.17M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 9 | Millennium Management ✦ | 618.99K | -29.0% | $63.92M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 10 | Renaissance Technologies ✦ | 525.18K | +60.6% | $54.24M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 11 | Two Sigma Investments ✦ | 421.79K | -14.9% | $43.56M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 12 | T. Rowe Price ✦ | 111.12K | +19.9% | $11.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 13 | T. Rowe Price ✦ | 111.12K | +19.9% | $11.48M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 14 | D. E. Shaw & Co. ✦ | 84.09K | -23.3% | $8.68M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 15 | D. E. Shaw & Co. ✦ | 84.09K | -23.3% | $8.68M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 16 | Gotham Asset Management ✦ | 13.22K | +11.4% | $1.36M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | Wellington Management ✦ | 12.00K | +4.8% | $1.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | Wellington Management ✦ | 12.00K | +4.8% | $1.24M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | Citadel Advisors ✦ | 11.22K | -45.3% | $1.16M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 20 | Citadel Advisors ✦ | 11.22K | -45.3% | $1.16M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 21 | Arrowstreet Capital ✦ | 2.07K | New | $213,562 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Arrowstreet Capital | $213,562 | 0.0% |
Exited
| Starboard Value | $55.13M | was 1.3% |
| Bridgewater Associates | $1.99M | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 614 holders, 112.58M shares, $9.24B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.