PESI · Perma Fix Environmental Services Inc · Short Interest
Substantial doubt about the company's ability to continue as a going concern.
“Because these customers do not provide binding assurances regarding the timing or volume of future work, and such activity is subject to appropriations, procurement processes, operational considerations and other factors outside the Company's control, management could not conclude that its plans are probable of effectively mitigating the conditions giving rise to substantial doubt. Accordingly, substantial doubt continues to exist about the Company's ability to continue as a going concern for one year following the date the accompanying Condensed Consolidated Financial Statements are issued. Although the May 2026 equity offering strengthened the Company's liquidity, management concluded that the substantial doubt was not alleviated.”View the 10-Q filed Aug 12, 2026
Key customers — 61.4% of revenue (the three months ended March 31, 2026)
“We performed services relating to waste generated by federal government clients, either indirectly as a subcontractor or directly as a prime contractor to federal government entities, representing approximately $6,836,000 or 61.4% of our total revenue during the three months ended March 31, 2026, as compared to $8,404,00 or 60.4% of our total revenue during the corresponding period of 2025.”
Key customers — 60.4% of revenue (the corresponding period of 2025)
“We performed services relating to waste generated by federal government clients, either indirectly as a subcontractor or directly as a prime contractor to federal government entities, representing approximately $6,836,000 or 61.4% of our total revenue during the three months ended March 31, 2026, as compared to $8,404,00 or 60.4% of our total revenue during the corresponding period of 2025.”
Shares sold short and not yet covered, reported twice monthly. Days to cover is the reported short position divided by average daily volume.
PESI Latest Reported Short Interest
FINRA reported 2,673,047 PESI shares sold short as of the September 15, 2026 settlement date, an increase of 377,632 shares. Days to cover was 11.96 based on FINRA's reported average daily volume.
Official FINRA short-interest data · share counts are restated for subsequent splits of this listing
PESI Short Interest Forecast
Equibles' model estimates 2,703,102 shares sold short for the September 30, 2026 settlement, +1.1% versus the latest reported position, with a likely range of 2,408,572 to 3,008,932 shares. This model prediction uses FINRA data through September 30, 2026; FINRA's official release is expected October 9, 2026.
Expected Sep 30 short interest
as of Sep 30 Low confidence 50% chance it risesPositioning score 79.1 + catalyst boost 0 (total capped at 100). This is a screening index, not a probability of a squeeze.
Method and coverage limits
Factor percentiles compare eligible primary operating-company stocks reporting short interest at the latest settlement date (2026-09-15). The weighted mean uses short interest 30%, days to cover 20%, price vs VWAP 15%, short-volume trend 15%, short-interest change 10%, and fails-to-deliver 10%. Missing factors redistribute their weight; incomplete coverage is not evidence of low risk. Price, volume, and earnings boosts add 10 each, capped at 20.
Shares outstanding are not free float. Borrow fees, utilization, lendable supply, recalls, and dealer inventory are not measured. Short-sale volume does not measure the change in open shorts; fails to deliver are not a borrow-cost measurement; price vs VWAP does not establish short sellers' entry prices. Earnings can move prices in either direction.
The weights are judgment-based, not calibrated to future squeeze outcomes. The separate options assessment below does not change this universe ranking.
Options positioning & squeeze sensitivity
Nearest expiration after today within 30 calendar days; same-day expirations and later maturities are excluded.
Open interest is incomplete, stale, or dated inconsistently; positioning totals are unavailable.
Open interest has both a buyer and a seller; it does not reveal dealer hedge direction. Gross gamma sums both calls and puts without netting and uses a local 1% price-change approximation. It measures sensitivity, not predicted buying or a squeeze probability.
Assessment prepared 2026-10-05 20:31 UTC. Options model values may come from a cached snapshot; their original computation time is not supplied. Open interest has its own effective date.
Short Interest History
| Settlement Date | Current Position | Previous Position | Change | Days to Cover |
|---|---|---|---|---|
|
2026-10-15
Scheduled
FINRA publishes Oct 26
|
— | — | — | — |
|
2026-09-30
Scheduled
FINRA publishes Oct 9
|
— | — | — | — |
| 2026-09-15 | 2,673,047 | 2,295,415 | +377,632 | 11.96 |
| 2026-08-31 | 2,295,415 | 2,783,230 | -487,815 | 7.03 |
| 2026-08-14 | 2,783,230 | 2,100,130 | +683,100 | 4.39 |
| 2026-07-31 | 2,100,130 | 2,315,207 | -215,077 | 3.35 |
| 2026-07-15 | 2,315,207 | 1,736,470 | +578,737 | 5.67 |
| 2026-06-30 | 1,736,470 | 1,930,478 | -194,008 | 4.47 |
| 2026-06-15 | 1,930,478 | 1,491,682 | +438,796 | 10.41 |
| 2026-05-29 | 1,491,682 | 1,506,247 | -14,565 | 5.95 |
| 2026-05-15 | 1,506,247 | 1,389,786 | +116,461 | 4.55 |
| 2026-04-30 | 1,389,786 | 1,333,669 | +56,117 | 13.33 |
| 2026-04-15 | 1,333,669 | 1,465,706 | -132,037 | 11.40 |
| 2026-03-31 | 1,465,706 | 1,204,860 | +260,846 | 5.48 |
| 2026-03-13 | 1,204,860 | 1,141,713 | +63,147 | 11.16 |
| 2026-02-27 | 1,141,713 | 1,200,709 | -58,996 | 8.48 |
| 2026-02-13 | 1,200,709 | 1,305,431 | -104,722 | 8.06 |
| 2026-01-30 | 1,305,431 | 1,378,088 | -72,657 | 9.22 |
| 2026-01-15 | 1,378,088 | 1,387,188 | -9,100 | 16.74 |
| 2025-12-31 | 1,387,188 | 1,522,357 | -135,169 | 13.28 |
| 2025-12-15 | 1,522,357 | 1,514,136 | +8,221 | 15.76 |
| 2025-11-28 | 1,514,136 | 1,445,155 | +68,981 | 14.69 |
| 2025-11-14 | 1,445,155 | 1,503,147 | -57,992 | 5.31 |
| 2025-10-31 | 1,503,147 | 1,552,495 | -49,348 | 7.46 |
| 2025-10-15 | 1,552,495 | 1,519,702 | +32,793 | 7.31 |
Full FINRA short interest reporting calendar