// company-profile
Perma Fix Environmental Services Inc
PESIExchangeNasdaqSectorHazardous Waste ManagementInc.DEFilings152Insiders13
// api This Perma Fix Environmental Services Inc insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, Perma Fix Environmental Services Inc insiders bought $89K across 7 transactions with no open-market sales.
- Most active insider: Grumski Joseph Timothy with 1 transaction totaling $17K.
- Largest single purchase: $17K by Grumski Joseph Timothy on Apr 1, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Perma Fix Environmental Services Inc as of 2026-03-31
Total reported AUM
$80.4M
QoQ change
-5.4%
Reporting period
2026-03-31
#1
MAK CAPITAL ONE LLC
CIK 1385702
$9.8M
919K shares
#2
Prescott Group Capital Management, L.L.C.
CIK 1166152
$8.3M
777K shares
#3
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$8.1M
759K shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Apr 1, 2026 | Shelton Larry | PESI | Award | 1,824 | $8.02 | $15K |
| Apr 1, 2026 | Grumski Joseph Timothy | PESI | Award | 2,105 | $8.02 | $17K |
| Apr 1, 2026 | Wamp Zach Paul | PESI | Award | 1,094 | $8.02 | $9K |
| Apr 1, 2026 | Bostick Thomas | PESI | Award | 1,559 | $8.02 | $12K |
| Apr 1, 2026 | REEDER JOE | PESI | Award | 1,886 | $8.02 | $15K |
45 more transactions hidden
Free account · No credit card required
Building something? Get API access →
Popular companies on Form4API
Browse insider trading activity for other actively-filed companies.