Mark Duff
President and CEO, Director · PERMA FIX ENVIRONMENTAL SERVICES INC
- 2025
- Sep 11, 2025
- 1
Other insiders active in the same stocks
Insiders who have reported open-market trades at the same companies as Mark Duff. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Kerry C. Duggan - $49K in PESI purchases and sales on record
- Larry Shelton - $18K in PESI purchases and sales on record
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Frequently asked questions
Who is Mark Duff?
Mark Duff is a corporate insider, tracked as President and CEO, Director of PERMA FIX ENVIRONMENTAL SERVICES INC (PESI). InsiderAlpha holds 1 primary Form 4 filing for them, the earliest from 2025, updated as new SEC EDGAR filings are processed.
When did Mark Duff last file a Form 4?
The only primary Form 4 on record is dated 11 September 2025.
Has Mark Duff been buying or selling stock?
Recorded transactions: 1 open-market purchase ($7K) and 0 open-market sales across all tracked filings.
