Perma-Fix Environmental Services
PESI
77 hedge funds and large institutions have $75M invested in Perma-Fix Environmental Services in 2025 Q3 according to their latest regulatory filings, with 16 funds opening new positions, 26 increasing their positions, 21 reducing their positions, and 7 closing their positions.
182% more call options, than puts
Call options by funds: $1.14M | Put options by funds: $404K
129% more first-time investments, than exits
New positions opened: 16 | Existing positions closed: 7
24% more repeat investments, than reductions
Existing positions increased: 26 | Existing positions reduced: 21
12% more funds holding
Funds holding: 69 → 77 (+8)
7% more capital invested
Capital invested by funds: $70.4M → $75M (+$4.62M)
3.91% more ownership
Funds ownership: 36.26% → 40.18% (+3.9%)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
MCO
MAK Capital One
New York
|
+$7.99M |
| 2 |
Goldman Sachs
New York
|
+$710K |
| 3 |
VanEck Associates
New York
|
+$525K |
| 4 |
D.E. Shaw & Co
New York
|
+$512K |
| 5 |
TI
Trexquant Investment
Stamford,
Connecticut
|
+$466K |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
MA
MYDA Advisors
Woodmere,
New York
|
-$1.87M |
| 2 |
Susquehanna International Group
Bala Cynwyd,
Pennsylvania
|
-$554K |
| 3 |
AIP
ARS Investment Partners
New York
|
-$478K |
| 4 |
AA
Ancora Advisors
Cleveland,
Ohio
|
-$336K |
| 5 |
CC
Commons Capital
Needham,
Massachusetts
|
-$319K |
| Name | Holding | Trade Value |
Shares Change |
Change in Stake |
|
|---|---|---|---|---|---|
|
MDCM
76
Morgan Dempsey Capital Management
Menomonee Falls,
Wisconsin
| $10 | – | – | – |
|
|
SS
77
SBI Securities
Tokyo,
Japan
| $10 | – | – | – |
|
|
MA
78
MYDA Advisors
Woodmere,
New York
| – | -$1.87M | -169,208 | Closed |
|
|
CC
79
Commons Capital
Needham,
Massachusetts
| – | -$319K | -30,350 | Closed |
|
|
MNBTD
80
Moody National Bank Trust Division
Galveston,
Texas
| – | -$263K | -25,000 | Closed |
|
|
BCM
81
Bridgeway Capital Management
Houston,
Texas
| – | -$214K | -20,300 | Closed |
|
|
XT
82
XTX Topco
George Town,
Cayman Islands
| – | -$199K | -18,956 | Closed |
|
83
Marshall Wace
London,
United Kingdom
| – | -$194K | -18,405 | Closed |
|
84
Raymond James Financial
St Petersburg,
Florida
| – | -$12.2K | -1,160 | Closed |
|
PESI Hedge Fund Activity: Q3 2025 in Review
77 of the 7,626 institutional investors tracked by Wall St. Rank reported a position in Perma-Fix Environmental Services (PESI) for Q3 2025, worth a combined $75M — up 6.6% from $70.4M a quarter earlier.
Buyers outnumbered sellers: 16 funds opened new PESI positions and 7 closed out — a net gain of 9 holders — while 26 added to existing stakes and 21 trimmed.
The largest buyer was MAK Capital One, adding an estimated $7.99M. The largest seller was MYDA Advisors, exiting entirely with an estimated $1.87M sold.
- 77 institutional investors held Perma-Fix Environmental Services (PESI) as of Q3 2025, up from 69 in Q2 2025.
- Funds reported $75M of Perma-Fix Environmental Services stock for Q3 2025, up 6.6% quarter-over-quarter.
- 16 funds opened new Perma-Fix Environmental Services positions in Q3 2025 and 7 closed out, a net change of +9 holders.
- The largest Perma-Fix Environmental Services buyer in Q3 2025 was MAK Capital One, an estimated $7.99M added.
- The largest Perma-Fix Environmental Services seller in Q3 2025 was MYDA Advisors, an estimated $1.87M sold.
Based on aggregated 13F filings for Q3 2025.