Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

PERMA FIX ENVIRONMENTAL SERVICES INC

PESI · Nasdaq · CIK 0000891532 · Industrials · Waste Management

INSIDER SIGNAL

No active buy signal

0 qualifying P purchase groups
in the current 180-day scoring window

15 Form 4 transaction lines observed in the same window
0 sales · 15 option, withholding, award, gift or other lines

Last qualifying purchase2025-09-11 · Duff Mark · $7.2K

WHY NO ACTIVE SIGNAL?

Purchase activityNone
Recent buyingNone
Recent salesNone
Buy signal statusInactive
Score anatomy

No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.

ClusterNot calculated
Purchase sizeNot calculated
RoleNot calculated
RecencyNot calculated
ConvictionNot calculated

Why is there no score?

  • No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
  • Sales and other Form 4 activity remain visible as context and do not create a negative score.

Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
Shelton LarryDirector
○○○
ZWECKER MARK ADirector
○○
REEDER JOEDirector
○○
Grumski Joseph TimothyDirector
○○
Duggan Kerry CDirector
○○
Bostick ThomasDirector
○○
● Purchase▼ Sale○ Other

Showing the six most active owners; 1 additional owner(s) remain in Form 4 evidence.

Purchase breadth, concentration & cluster buying

These modules activate when qualifying purchases enter the 180-day research window.

SIGNAL HISTORY

No recorded active-signal snapshot

Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-09-11 · Duff Mark.

Recent Form 4 activity

0Purchases
0Sales
38Other Form 4 lines
32SEC filings · 365 days
BUYING0 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER15 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
3,203,755
Previous report
2,673,047
Avg daily volume
394,148
Days to cover
8.1

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2025-09-11Shelton LarryPurchase (P)Common Stock1,000USD 8.58USD 8,580SEC filing ↗
2025-09-11Duff MarkPurchase (P)Common Stock897USD 8.05USD 7,221SEC filing ↗
2025-09-09Shelton LarryPurchase (P)Common Stock1,000USD 9.61USD 9,610SEC filing ↗
2025-03-21Naccarato BenPurchase (P)Common Stock400USD 7.00USD 2,800SEC filing ↗
2025-03-21Duff MarkPurchase (P)Common Stock2,050USD 7.03USD 14,417SEC filing ↗
2025-03-18Eshleman TroyPurchase (P)Common Stock1,350USD 7.35USD 9,922SEC filing ↗
2025-03-18Duff MarkPurchase (P)Common Stock1,000USD 7.15USD 7,150SEC filing ↗
2025-03-17CENTOFANTI LOUIS FPurchase (P)Common Stock1,000USD 7.31USD 7,310SEC filing ↗
2024-09-04Duff MarkPurchase (P)Common Stock850USD 9.93USD 8,438SEC filing ↗
2024-09-03Duff MarkPurchase (P)Common Stock1,250USD 10.23USD 12,792SEC filing ↗
2023-12-05Lombardo AndyPurchase (P)Common Stock2,150USD 7.63USD 16,404SEC filing ↗
2023-12-01Shelton LarryPurchase (P)Common Stock2,000USD 7.20USD 14,400SEC filing ↗
2023-12-01Duff MarkPurchase (P)Common Stock3,000USD 7.16USD 21,465SEC filing ↗
2022-12-22CENTOFANTI LOUIS FPurchase (P)Common Stock1,700USD 3.78USD 6,426SEC filing ↗
2022-12-14Naccarato BenPurchase (P)Common Stock575USD 3.47USD 1,995SEC filing ↗

Form 4 evidence

38 transaction lines in the latest 365-day window; 325 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01ZWECKER MARK AAward / grant (A)Common Stock1,038USD 11.74USD 12,184SEC filing ↗
2026-10-01Wamp Zach PaulAward / grant (A)Common Stock775USD 11.74USD 9,097SEC filing ↗
2026-10-01Shelton LarryAward / grant (A)Common Stock1,246USD 11.74USD 14,625SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-10-01ZWECKER MARK AAward / grant (A)Common Stock1,038USD 11.74USD 12,184SEC filing ↗
2026-10-01Wamp Zach PaulAward / grant (A)Common Stock775USD 11.74USD 9,097SEC filing ↗
2026-10-01Shelton LarryAward / grant (A)Common Stock1,246USD 11.74USD 14,625SEC filing ↗
2026-10-01REEDER JOEAward / grant (A)Common Stock1,289USD 11.74USD 15,130SEC filing ↗
2026-10-01Grumski Joseph TimothyAward / grant (A)Common Stock1,438USD 11.74USD 16,879SEC filing ↗
2026-10-01Duggan Kerry CAward / grant (A)Common Stock748USD 11.74USD 8,780SEC filing ↗
2026-10-01Bostick ThomasAward / grant (A)Common Stock1,108USD 11.74USD 13,005SEC filing ↗
2026-07-13Shelton LarryOption exercise / conversion (M)Common Stock2,400USD 4.60USD 11,040SEC filing ↗
2026-07-01ZWECKER MARK AAward / grant (A)Common Stock1,167USD 10.72USD 12,510SEC filing ↗
2026-07-01Wamp Zach PaulAward / grant (A)Common Stock849USD 10.72USD 9,101SEC filing ↗
2026-07-01Shelton LarryAward / grant (A)Common Stock1,365USD 10.72USD 14,633SEC filing ↗
2026-07-01REEDER JOEAward / grant (A)Common Stock1,458USD 10.72USD 15,630SEC filing ↗
2026-07-01Grumski Joseph TimothyAward / grant (A)Common Stock1,528USD 10.72USD 16,380SEC filing ↗
2026-07-01Duggan Kerry CAward / grant (A)Common Stock819USD 10.72USD 8,780SEC filing ↗
2026-07-01Bostick ThomasAward / grant (A)Common Stock1,213USD 10.72USD 13,003SEC filing ↗
2026-04-01ZWECKER MARK AAward / grant (A)Common Stock1,520USD 8.02USD 12,190SEC filing ↗
2026-04-01Wamp Zach PaulAward / grant (A)Common Stock1,094USD 8.02USD 8,774SEC filing ↗
2026-04-01Shelton LarryAward / grant (A)Common Stock1,824USD 8.02USD 14,628SEC filing ↗
2026-04-01REEDER JOEAward / grant (A)Common Stock1,886USD 8.02USD 15,126SEC filing ↗
2026-04-01Grumski Joseph TimothyAward / grant (A)Common Stock2,105USD 8.02USD 16,882SEC filing ↗
2026-04-01Duggan Kerry CAward / grant (A)Common Stock1,054USD 8.02USD 8,453SEC filing ↗
2026-04-01Bostick ThomasAward / grant (A)Common Stock1,559USD 8.02USD 12,503SEC filing ↗
2026-01-20Grondin RichardOption exercise / conversion (M)Common Stock11,000USD 5.34USD 58,750SEC filing ↗
2026-01-20Grondin RichardTax withholding (F)Common Stock4,284USD 13.71USD 58,734SEC filing ↗
2026-01-02REEDER JOEAward / grant (A)Common Stock1,549USD 9.44USD 14,623SEC filing ↗
2026-01-02ZWECKER MARK AAward / grant (A)Common Stock1,325USD 9.44USD 12,508SEC filing ↗
2026-01-02Wamp Zach PaulAward / grant (A)Common Stock964USD 9.44USD 9,100SEC filing ↗
2026-01-02Shelton LarryAward / grant (A)Common Stock1,583USD 9.44USD 14,944SEC filing ↗
2026-01-02Grumski Joseph TimothyAward / grant (A)Common Stock1,840USD 9.44USD 17,370SEC filing ↗
2026-01-02Duggan Kerry CAward / grant (A)Common Stock929USD 9.44USD 8,770SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerPESI
CIK0000891532
SectorIndustrials
IndustryWaste Management Yahoo Finance
SEC SIC4955 Hazardous Waste Management
ExchangeNasdaq

Data coverage

Local Form 4 history325 transaction lines from 2020-01-02 to 2026-10-01
73 P purchase lines · 4 S sale lines · 248 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.