Perma-Fix Environmental Services, Inc. (PESI)

Distributing

Institutional distribution: ownership decreased -0.90% quarter-over-quarter.

Data as of Q1 2026

Institutional Ownership

41.95%

QoQ Change

-0.90%

Total Value

$82.9B

Shares Outstanding

18.5M

Crowding AnalysisCrowded

Holders84of 5,944

Avg: 68

Uncrowded86th percentileCrowded

Institutional Activity

Buy/Sell Ratio0.93x

63th percentile

38 buying41 selling

+17

New

-16

Closed

-188,221

Net shares

Holding Period Distribution

estimate

Median: 3 QAvg: 3.5 QHolders: 84

Ownership Concentration

Top 5: 52.2%Top 10: 73.2%

BlackRock,15.0%

MAK CAPITAL ONE11.8%

PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C.10.0%

VANGUARD CAPITAL MANAGEMENT9.8%

GEODE CAPITAL MANAGEMENT,5.6%

Others (79)47.8%

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Conviction-Weighted Ownership

Median weight: 0.01%Avg weight: 0.53%Max: 2.76%High conviction (>1%): 2

BlackRock,

MAK CAPITAL ONE

PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C.

VANGUARD CAPITAL MANAGEMENT

GEODE CAPITAL MANAGEMENT,

HEARTLAND ADVISORS

DIAMOND HILL CAPITAL MANAGEMENT

STATE STREET

Potomac Capital Management,

GROUP ONE TRADING

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Whale Moves Timeline (8 Quarters)

Biggest dollar-value position changes among top 10 holders

NEWVANGUARD CAPITAL MANAGEMENT$8M759K shr

NEWGROUP ONE TRADING$3M248K shr

SOLDPotomac Capital Management$482K45K shr

SOLDDIAMOND HILL CAPITAL MANAGEMENT$330K31K shr

SOLDBlackRock$296K28K shr

NEWPotomac Capital Management$4M342K shr

NEWRothschild Wealth$2M166K shr

BOUGHTMAK CAPITAL ONE$1M103K shr

SOLDHEARTLAND ADVISORS$733K58K shr

BOUGHTVANGUARD GROUP$405K32K shr

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Institutional Trends (8 Quarters)

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Institutional Holders

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