PESI Perma-Fix Environmental Services, Inc.

NASDAQ
$17.45

Perma-Fix Environmental Services, Inc. (PESI) Institutional Ownership

What the institutions did with PESI last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.

Managers compared
96
filed both this quarter and last
Managers holding
87
+4 on the quarter
Buyers
47
13 opened new
Sellers
26
9 sold out entirely
Buyer share
64.4%
of managers who traded it
Breadth
+28.8
net buyers, as a share of those trading

Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Ownership map

Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.

Cut Unchanged Added Color saturates at ±50%.

Largest holders

Manager Shares % of reported
BlackRock, Inc. 1.3M 13.2%
MAK CAPITAL ONE LLC 1.0M 10.9%
VANGUARD CAPITAL MANAGEMENT LLC 811.7K 8.6%
Prescott Group Capital Management, L.L.C. 777.1K 8.2%
DIAMOND HILL CAPITAL MANAGEMENT INC 642.5K 6.8%
KENNEDY CAPITAL MANAGEMENT LLC 610.9K 6.5%
Potomac Capital Management, Inc. 477.0K 5.0%
GEODE CAPITAL MANAGEMENT, LLC 455.2K 4.8%
HEARTLAND ADVISORS INC 400.0K 4.2%
STATE STREET CORP 349.7K 3.7%
DIMENSIONAL FUND ADVISORS LP 191.1K 2.0%
GOLDMAN SACHS GROUP INC 162.8K 1.7%
SUSQUEHANNA INTERNATIONAL GROUP, LLP 156.9K 1.7%
CITADEL ADVISORS LLC 152.6K 1.6%
NORTHERN TRUST CORP 141.6K 1.5%
VANGUARD FIDUCIARY TRUST CO 123.0K 1.3%
GROUP ONE TRADING LLC 122.6K 1.3%
VANGUARD PORTFOLIO MANAGEMENT LLC 121.3K 1.3%
North Star Investment Management Corp. 120.5K 1.3%
Diametric Capital, LP 114.7K 1.2%
MYDA Advisors LLC 90.0K 1.0%
CM WEALTH ADVISORS LLC 87.8K 0.9%
XTX Topco Ltd 62.9K 0.7%
Owls Nest Partners IA, LLC 56.6K 0.6%
Pale Fire Capital SE 55.6K 0.6%

Largest changes

Manager Action Previous Current Change
KENNEDY CAPITAL MANAGEMENT LLC New 0 610.9K +610.9K
DIAMOND HILL CAPITAL MANAGEMENT INC Increased 356.0K 642.5K +286.6K
Potomac Capital Management, Inc. Increased 296.7K 477.0K +180.3K
SUSQUEHANNA INTERNATIONAL GROUP, LLP Increased 11.1K 156.9K +145.8K
GROUP ONE TRADING LLC Reduced 247.7K 122.6K -125.1K
Diametric Capital, LP New 0 114.7K +114.7K
MAK CAPITAL ONE LLC Increased 918.7K 1.0M +114.3K
CM WEALTH ADVISORS LLC New 0 87.8K +87.8K
CITADEL ADVISORS LLC Increased 69.3K 152.6K +83.3K
BlackRock, Inc. Increased 1.2M 1.3M +82.5K
Owls Nest Partners IA, LLC New 0 56.6K +56.6K
VANGUARD CAPITAL MANAGEMENT LLC Increased 759.4K 811.7K +52.3K
SEI INVESTMENTS CO New 0 41.0K +41.0K
XTX Topco Ltd Increased 23.2K 62.9K +39.7K
D. E. Shaw & Co., Inc. Reduced 63.0K 24.9K -38.1K
ALLIANCEBERNSTEIN L.P. New 0 32.9K +32.9K
UBS Group AG Reduced 62.1K 31.5K -30.6K
MYDA Advisors LLC Reduced 120.0K 90.0K -30.0K
DIMENSIONAL FUND ADVISORS LP Increased 163.8K 191.1K +27.3K
MORGAN STANLEY Increased 26.7K 53.1K +26.4K
GEODE CAPITAL MANAGEMENT, LLC Increased 432.7K 455.2K +22.5K
Trexquant Investment LP New 0 21.9K +21.9K
Squarepoint Ops LLC Reduced 51.9K 31.0K -21.0K
VANGUARD PORTFOLIO MANAGEMENT LLC Increased 100.3K 121.3K +20.9K
GOLDMAN SACHS GROUP INC Increased 142.7K 162.8K +20.1K
Quadrature Capital Ltd New 0 19.0K +19.0K
JANE STREET GROUP, LLC Increased 28.5K 46.7K +18.1K
FIFTH LANE CAPITAL, LP New 0 18.0K +18.0K
GSA CAPITAL PARTNERS LLP Sold Out 16.1K 0 -16.1K
GatePass Capital, LLC Increased 29.7K 44.7K +15.0K
STATE STREET CORP Increased 335.5K 349.7K +14.2K
Fermata Advisors, LLC Sold Out 12.9K 0 -12.9K
NORTHERN TRUST CORP Increased 129.6K 141.6K +12.1K
Greenhaven Road Investment Management, L.P. Sold Out 11.3K 0 -11.3K
Invesco Ltd. Sold Out 11.1K 0 -11.1K
AMERICAN CENTURY COMPANIES INC Sold Out 10.7K 0 -10.7K
WELLS FARGO & COMPANY/MN Increased 20.8K 29.3K +8.5K
CITIGROUP INC Increased 819 8.2K +7.4K
Pale Fire Capital SE Increased 48.6K 55.6K +7.0K
Russell Investments Group, Ltd. Increased 1.7K 8.7K +7.0K
CORSAIR CAPITAL MANAGEMENT, L.P. Increased 37.6K 42.6K +5.0K
MetLife Investment Management, LLC Increased 4.9K 9.4K +4.5K
Persistent Asset Partners Ltd New 0 3.9K +3.9K
BANK OF AMERICA CORP /DE/ Reduced 45.2K 41.4K -3.8K
VANGUARD FIDUCIARY TRUST CO Increased 119.3K 123.0K +3.8K
BROWN ADVISORY INC Increased 20.0K 23.3K +3.3K
Bank of New York Mellon Corp Reduced 40.4K 38.1K -2.3K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC Increased 43.6K 45.2K +1.7K
BNP PARIBAS FINANCIAL MARKETS Reduced 3.7K 2.5K -1.2K
DEUTSCHE BANK AG\ Increased 14.6K 15.4K +745
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Reduced 936 243 -693
BARCLAYS PLC Reduced 3.3K 2.7K -565
FMR LLC Reduced 4.7K 4.2K -545
RHUMBLINE ADVISERS Reduced 21.4K 20.9K -531
ROYAL BANK OF CANADA Increased 50 579 +529
Rockefeller Capital Management L.P. Sold Out 500 0 -500
PRICE T ROWE ASSOCIATES INC /MD/ Increased 11.2K 11.7K +479
IMC-Chicago, LLC Reduced 16.9K 16.5K -468
Sterling Capital Management LLC Reduced 501 101 -400
JPMORGAN CHASE & CO Increased 7.1K 7.5K +387

13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.