ACM
Aecom
stockNYSE
At CloseOct 20, 2026 3:59:53 PM EDT
58.99USD+1.672%(+0.97)1,189,252
Pre-marketOct 20, 2026 8:43:30 AM EDT
58.00USD-0.034%(-0.02)
After-hoursOct 20, 2026 4:10:30 PM EDT
58.99USD0.000%(-0.00)
As of 2026-09-30, there were 5,936,614 shares short with a short interest of 4.65%.
ACM Short Interest - Official
ACM Short Position Change - Official
ACM Short Interest - Official
| Settlement Date1 | Short Interest % | Short Position | Days to Cover2 | Short Position Change | Short Position Change % | Shares Out | Shares Float |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | 4.65 | 5,936,614 | 3.25 | -399,863 | -6.31 | 128,696,425 | 127,795,480 |
| 2026-09-15 | 4.96 | 6,336,477 | 4.09 | +586,657 | +10.20 | 128,696,425 | 127,795,480 |
| 2026-08-31 | 4.50 | 5,749,820 | 2.11 | +633,592 | +12.38 | 128,696,425 | 127,795,480 |
| 2026-08-14 | 4.00 | 5,116,228 | 2.10 | -2,019,328 | -28.30 | 128,696,425 | 127,795,480 |
| 2026-07-31 | 5.58 | 7,135,556 | 4.70 | -1,509,751 | -17.46 | 128,522,920 | 127,795,480 |
| 2026-07-15 | 6.76 | 8,645,307 | 5.45 | -309,434 | -3.46 | 128,522,920 | 127,799,336 |
| 2026-06-30 | 7.01 | 8,954,741 | 3.90 | +2,609,766 | +41.13 | 128,522,920 | 127,799,336 |
| 2026-06-15 | 4.96 | 6,344,975 | 3.43 | -111,443 | -1.73 | 128,522,920 | 127,798,051 |
| 2026-05-29 | 5.05 | 6,456,418 | 1.74 | -518,404 | -7.43 | 128,522,920 | 127,803,192 |
| 2026-05-15 | 5.45 | 6,974,822 | 4.17 | +812,822 | +13.19 | 128,522,920 | 127,913,286 |
| 2026-04-30 | 4.70 | 6,162,000 | 5.50 | +606,027 | +10.91 | 129,288,624 | 131,118,795 |
| 2026-04-15 | 4.24 | 5,555,973 | 4.90 | +41,300 | +0.75 | 129,288,624 | 131,118,795 |
| 2026-03-31 | 4.21 | 5,514,673 | 4.58 | +784,030 | +16.57 | 129,288,624 | 131,118,795 |
| 2026-03-13 | 3.61 | 4,730,643 | 4.49 | +505,701 | +11.97 | 129,288,624 | 131,118,795 |
| 2026-02-27 | 3.22 | 4,224,942 | 2.27 | +990,971 | +30.64 | 129,288,624 | 131,118,795 |
| 2026-02-13 | 2.47 | 3,233,971 | 1.39 | -145,649 | -4.31 | 129,288,624 | 131,118,795 |
| 2026-01-30 | 2.58 | 3,379,620 | 2.31 | -418,351 | -11.02 | 129,278,980 | 131,118,795 |
| 2026-01-15 | 2.90 | 3,797,971 | 3.23 | -190,500 | -4.78 | 131,833,332 | 131,118,795 |
| 2025-12-31 | 3.04 | 3,988,471 | 2.94 | -43,610 | -1.08 | 131,833,332 | 131,118,795 |
| 2025-12-15 | 3.07 | 4,032,081 | 2.51 | -363,646 | -8.27 | 131,833,332 | 131,205,805 |
| 2025-11-28 | 3.35 | 4,395,727 | 2.01 | +898,081 | +25.68 | 131,833,332 | 131,205,805 |
| 2025-11-14 | 2.65 | 3,497,646 | 4.50 | +378,717 | +12.14 | 132,446,101 | 131,814,333 |
| 2025-10-31 | 2.37 | 3,118,929 | 4.28 | +123,868 | +4.14 | 132,446,101 | 131,814,333 |
Historical data is split-adjusted.
1 Data from Finra. Finra publishes an updated file every two weeks.
2 Days to Cover (DTC) is also called Short Ratio. This is the Short Position / Average Daily Trading Volume.