Perma-Fix Environmental Svcs Inc (PESI) short interest & short volume · 3.5M shares short
Perma-Fix Environmental Svcs Inc official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
PESI short interest rose 10.3% to 3.5M shares in the Oct 15, 2026 report (11.4 days to cover). Daily short volume averaged 57.2% of volume over the last 20 sessions, down from 61.4% the 20 sessions before, the 56th percentile of its own 20-day averages since Sep 23, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 3.5M
- prior 3.2M
- % of float
- —
- no float on file
- Days to cover
- 11.4
- avg vol 309K
- Change vs prior report
- +10.3%
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.
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)
- 52.0%
- 71K of 137K
- 20-day average
- 57.2%
- prior 61.4%
- Percentile vs own history
- 56th
- 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: -1.8%
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.
PESI'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 · PESI overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-02 | 71,077 | 136,594 | 52.0% |
| 2026-10-30 | 66,092 | 99,246 | 66.6% |
| 2026-10-29 | 52,067 | 85,482 | 60.9% |
| 2026-10-28 | 86,801 | 136,569 | 63.6% |
| 2026-10-27 | 83,453 | 132,567 | 63.0% |
| 2026-10-26 | 45,199 | 75,831 | 59.6% |
| 2026-10-23 | 50,047 | 80,609 | 62.1% |
| 2026-10-22 | 36,723 | 84,410 | 43.5% |
| 2026-10-21 | 63,267 | 100,147 | 63.2% |
| 2026-10-20 | 90,446 | 187,704 | 48.2% |
Industrials peers with similar quant ratings
PESI is rated 1.05 of 5 among 418 rated Industrials stocks (Lician quant rating, Nov 4, 2026). How the rating works
- HY short interest1.09 · Strong Sell · stock
- FLY short interest1.08 · Strong Sell · stock
- LTBR short interest1.07 · Strong Sell · stock
- ACHR short interest1.06 · Strong Sell
- SPIR short interest1.04 · Strong Sell · stock
- RCAT short interest1.03 · Strong Sell · stock
- JOBY short interest1.02 · Strong Sell · stock
- EVEX short interest1.01 · Strong Sell
PESI short interest FAQ
What is PESI's short interest?
Perma-Fix Environmental Svcs Inc (PESI) had 3.5M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does PESI have?
11.4 days: 3.5M shares short divided by an average daily volume of 309K for the Oct 15, 2026 period.
Is PESI short interest rising or falling?
PESI short interest rose (+10.3%) from 3.2M to 3.5M shares in the Oct 15, 2026 report.
Is PESI a short squeeze candidate?
Lician's squeeze watch scores PESI 28 out of 100 (low) from the Oct 15, 2026 report: days to cover 25/25, change in short interest vs prior report 3.1/15, price change since settlement date 0/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of PESI daily volume is sold short?
57.2% on average over the last 20 sessions to Nov 2, 2026 (FINRA Reg SHO daily short volume; the 56th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was PESI's latest FINRA short volume?
On Nov 2, 2026, cached FINRA short volume for Perma-Fix Environmental Svcs Inc (PESI) was 71,077 shares, 52.0% of 136,594 total volume.
How many PESI short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Perma-Fix Environmental Svcs Inc (PESI), from Oct 20, 2026 through Nov 2, 2026.
How did PESI short volume percent change from the prior cached session?
Cached FINRA short volume for Perma-Fix Environmental Svcs Inc (PESI) moved from 66.6% on Oct 30, 2026 to 52.0% on Nov 2, 2026, down 14.6 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.