ACI Worldwide Inc (ACIW) short interest & short volume · 6.1% of float short
ACI Worldwide Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
ACIW short interest fell 1.5% to 6.3M shares in the Oct 15, 2026 report (6.1% of float, 9.7 days to cover). Daily short volume averaged 63.5% of volume over the last 20 sessions, down from 72.7% the 20 sessions before, the 64th percentile of its own 20-day averages since Sep 22, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 6.3M
- prior 6.4M
- % of float
- 6.1%
- float 103.8M
- Days to cover
- 9.7
- avg vol 652K
- Change vs prior report
- -1.5%
Days to cover is short interest divided by FINRA's average daily volume for the period: how many average days of trading it would take shorts to buy back.
% of float uses the current float for every report (no float was stored with older reports).
Source: FINRA equity short interest (twice monthly) · Settlement Oct 15, 2026
Daily short volume
Share of each day's volume sold short · FINRA Reg SHO
- Latest (Nov 2)
- 49.8%
- 177K of 355K
- 20-day average
- 63.5%
- prior 72.7%
- Percentile vs own history
- 64th
- 233 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Nov 2, 2026
Short squeeze score (model)
Price since settlement: +11.2%
Model, not a forecast: 40 pts short interest % of float (full at 30%), 25 pts days to cover (full at 10), 15 pts rise in short interest since the prior report (full at +50%), 20 pts price gain since the settlement date (full at +25%). Missing inputs score 0.
ACIW's squeeze score and its inputs with Lician Pro.Start 3-day trial — $149/yr
Market-wide: most shorted stocks, biggest changes and unusual short volume · ACIW overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 176,798 | 355,345 | 49.8% |
| 2026-10-30 | 114,026 | 218,875 | 52.1% |
| 2026-10-29 | 127,159 | 216,272 | 58.8% |
| 2026-10-28 | 189,061 | 346,851 | 54.5% |
| 2026-10-27 | 172,229 | 276,711 | 62.2% |
| 2026-10-26 | 281,950 | 390,673 | 72.2% |
| 2026-10-23 | 153,752 | 322,550 | 47.7% |
| 2026-10-22 | 189,862 | 518,481 | 36.6% |
| 2026-10-21 | 169,945 | 318,871 | 53.3% |
| 2026-10-20 | 280,739 | 440,047 | 63.8% |
Technology peers with similar quant ratings
ACIW is rated 2.84 of 5 among 462 rated Technology stocks (Lician quant rating, Nov 4, 2026). How the rating works
- OOMA short interest2.88 · Hold · stock
- OLED short interest2.87 · Hold · stock
- CIEN short interest2.86 · Hold · stock
- LDOS short interest2.85 · Hold · stock
- SNOW short interest2.84 · Hold · stock
- BHE short interest2.83 · Hold · stock
- PSN short interest2.82 · Hold · stock
- GLOB short interest2.81 · Hold
ACIW short interest FAQ
What is ACIW's short interest?
ACI Worldwide Inc (ACIW) had 6.3M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report, 6.1% of its 103.8M-share float.
How many days to cover does ACIW have?
9.7 days: 6.3M shares short divided by an average daily volume of 652K for the Oct 15, 2026 period.
Is ACIW short interest rising or falling?
ACIW short interest fell (-1.5%) from 6.4M to 6.3M shares in the Oct 15, 2026 report.
Is ACIW a short squeeze candidate?
Lician's squeeze watch scores ACIW 41 out of 100 (elevated) from the Oct 15, 2026 report: short interest % of float 8.1/40, days to cover 24.2/25, change in short interest vs prior report 0/15, price change since settlement date 9/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of ACIW daily volume is sold short?
63.5% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 64th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was ACIW's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for ACI Worldwide Inc (ACIW) was 176,798 shares, 49.8% of 355,345 total volume.
How many ACIW short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for ACI Worldwide Inc (ACIW), from Oct 20, 2026 through Nov 2, 2026.
How did ACIW short volume percent change from the prior cached session?
Cached FINRA short volume for ACI Worldwide Inc (ACIW) moved from 52.1% on Oct 30, 2026 to 49.8% on Nov 2, 2026, down 2.3 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.