Activity Companies Alerts About

Mark Duff owns 0.63% of Perma Fix Environmental Services

134,556 shares as of the September 11, 2025 filing, worth $1.6M at the latest close.

PESI · $259M market cap
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Free.
The stake
0.63%
worth $1.6M at the latest close
Stake rank
#2,498
by dollar value of the stake
Last sale
None
no sales since 2017
Last buy
411 days ago
Sep 11, 2025 · $7,221

Mark Duff owns 0.63% of PERMA FIX ENVIRONMENTAL SERVICES INC: 134,556 of 21,218,351 shares, worth about $1.6M at the 2026-10-26 close. The stake has moved from 0.00% in 2016 to 0.63% on 2026-08-07, across 0 sales and 21 purchases that moved it since 2016. The last trade that moved it was a discretionary purchase of $7,221 on 2025-09-11.

How the stake is held

as of the Sep 11, 2025 filing
SHARES
OF THE STAKE
COMMON STOCK · stated Sep 11, 2025 · Form 4 ↗
HELD DIRECTLY
134,556
100.0%
THE STAKE
134,556
0.63%