ACIW
ACI Worldwide, Inc.
stockNASDAQ
At CloseOct 20, 2026 3:59:54 PM EDT
54.57USD+4.500%(+2.35)1,122,936
As of 2026-09-30, there were 6,395,790 shares short with a short interest of 6.37%.
ACIW Short Interest - Official
ACIW Short Position Change - Official
ACIW 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 | 6.37 | 6,395,790 | 8.59 | -31,259 | -0.49 | 100,955,241 | 100,331,837 |
| 2026-09-15 | 6.41 | 6,427,049 | 8.83 | +121,872 | +1.93 | 100,955,241 | 100,331,837 |
| 2026-08-31 | 6.28 | 6,305,177 | 7.94 | +276,259 | +4.58 | 100,955,241 | 100,331,837 |
| 2026-08-14 | 6.01 | 6,028,918 | 4.49 | +292,055 | +5.09 | 100,955,241 | 100,331,837 |
| 2026-07-31 | 5.72 | 5,736,863 | 6.39 | +997,736 | +21.05 | 101,661,570 | 100,331,837 |
| 2026-07-15 | 4.72 | 4,739,127 | 4.32 | -203,814 | -4.12 | 101,661,570 | 100,331,837 |
| 2026-06-30 | 4.93 | 4,942,941 | 3.92 | +743,131 | +17.69 | 101,661,570 | 100,336,920 |
| 2026-06-15 | 4.19 | 4,199,810 | 4.83 | -70,563 | -1.65 | 101,661,570 | 100,336,920 |
| 2026-05-29 | 4.25 | 4,270,373 | 6.48 | -514,144 | -10.75 | 101,661,570 | 100,362,335 |
| 2026-05-15 | 4.76 | 4,784,517 | 6.21 | +501,331 | +11.70 | 101,661,570 | 100,463,997 |
| 2026-04-30 | 4.20 | 4,283,186 | 5.20 | -12,956 | -0.30 | 101,349,931 | 101,964,347 |
| 2026-04-15 | 4.21 | 4,296,142 | 6.75 | +212,424 | +5.20 | 101,719,981 | 101,964,347 |
| 2026-03-31 | 4.01 | 4,083,718 | 5.66 | +263,070 | +6.89 | 101,719,981 | 101,964,347 |
| 2026-03-13 | 3.75 | 3,820,648 | 4.59 | +104,555 | +2.81 | 101,719,981 | 101,964,347 |
| 2026-02-27 | 3.64 | 3,716,093 | 3.51 | +158,350 | +4.45 | 103,088,006 | 101,964,347 |
| 2026-02-13 | 3.49 | 3,557,743 | 3.55 | -500,420 | -12.33 | 103,088,006 | 101,964,347 |
| 2026-01-30 | 3.98 | 4,058,163 | 5.84 | +127,293 | +3.24 | 103,088,006 | 101,964,347 |
| 2026-01-15 | 3.86 | 3,930,870 | 6.16 | +348,611 | +9.73 | 103,088,006 | 101,964,347 |
| 2025-12-31 | 3.51 | 3,582,259 | 5.10 | -672,341 | -15.80 | 103,088,006 | 101,964,347 |
| 2025-12-15 | 4.17 | 4,254,600 | 6.05 | +94,933 | +2.28 | 103,088,006 | 101,964,347 |
| 2025-11-28 | 4.08 | 4,159,667 | 5.98 | -48,568 | -1.15 | 103,088,006 | 101,968,470 |
| 2025-11-14 | 4.13 | 4,208,235 | 5.05 | +819,737 | +24.19 | 103,088,006 | 101,965,378 |
| 2025-10-31 | 3.32 | 3,388,498 | 4.90 | +467,875 | +16.02 | 103,192,071 | 102,069,341 |
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.