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Equibles

PESI

Perma Fix Environmental Services Inc

Company with tickers: PESI

CIK
891532
CUSIP
714157203
Shares Outstanding
21,195,552
13F Activity (30d)
44 filings 42 filers

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 85
Total Value: $83,232,768
Total Shares: 7,786,045

Institutional Ownership Trend

25 quarters

Holder Concentration

Across 85 13F filers · Δ vs Dec 31, 2025
Top Holder
15.0%
Jun 2023 → Mar 2026 · range 13.8% – 18.6%
−2.1 pts
Top 5
52.1%
Jun 2023 → Mar 2026 · range 50.2% – 56.7%
−1.0 pts
Top 10
73.1%
Jun 2023 → Mar 2026 · range 70.1% – 78.5%
+0.4 pts
HHI
712
Jun 2023 → Mar 2026 · range 669 – 884
Broadly held−62

Quarterly Activity

vs Dec 31, 2025
New
18
Increased
20
Decreased
25
Sold Out
15
Unchanged
22
Holder count: +3
Institutional value: -5.6%
Shares held: +11.2%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mid GROUP ONE TRADING LLC +243,647 247,674
Mega GOLDMAN SACHS GROUP INC +70,750 142,687
Mega UBS Group AG +33,118 62,082
Mega STATE STREET CORP +23,280 335,547
Small MYDA Advisors LLC +20,000 120,000

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Small Rothschild Wealth LLC −145,700 20,600
Mega JANE STREET GROUP, LLC −64,714 79,525
Small Potomac Capital Management, Inc. −45,100 296,700
Mega MORGAN STANLEY −40,013 26,718
Small GatePass Capital, LLC −35,000 29,742

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mega VANGUARD CAPITAL MANAGEMENT LLC 759,435 $8,118,360
Mid North Star Investment Management Corp. 120,532 $1,288,487
Mega VANGUARD FIDUCIARY TRUST CO 119,253 $1,274,814
Mega VANGUARD PORTFOLIO MANAGEMENT LLC 100,318 $1,072,399
Mid SIMPLEX TRADING, LLC 31,318 $334,789

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Micro Perritt Capital Management Inc 166,300 $2,093,717
Small Informed Momentum Co LLC 64,784 $815,630
Mid Ancora Advisors LLC 57,927 $729,300
Large SEI INVESTMENTS CO 39,442 $496,574
Mega MILLENNIUM MANAGEMENT LLC 38,617 $486,188
Filter: New 18 Increased 20 Reduced 25 Sold out 15 Unchanged 22
Showing 88 of 88
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $12,510,537 15.03% 1,170,303
Small MAK CAPITAL ONE LLC $9,820,614 11.80% 918,673
Small Prescott Group Capital Management, L.L.C. $8,307,647 9.98% 777,142
Mega VANGUARD CAPITAL MANAGEMENT LLC $8,118,360 9.75% 759,435
Mega GEODE CAPITAL MANAGEMENT, LLC $4,625,572 5.56% 432,701
Mid HEARTLAND ADVISORS INC $4,276,000 5.14% 400,000
Large DIAMOND HILL CAPITAL MANAGEMENT INC $3,805,404 4.57% 355,978
Mega STATE STREET CORP $3,586,997 4.31% 335,547
Small Potomac Capital Management, Inc. $3,171,723 3.81% 296,700
Mid GROUP ONE TRADING LLC $2,647,635 3.18% 247,674
Mega DIMENSIONAL FUND ADVISORS LP $1,750,882 2.10% 163,787
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $1,608,845 1.93% 150,500
Mega GOLDMAN SACHS GROUP INC $1,525,323 1.83% 142,687
Mega NORTHERN TRUST CORP Bank $1,385,081 1.66% 129,568
Mid North Star Investment Management Corp. $1,288,487 1.55% 120,532
Small MYDA Advisors LLC $1,282,800 1.54% 120,000
Mega VANGUARD FIDUCIARY TRUST CO Bank $1,274,814 1.53% 119,253
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $1,072,399 1.29% 100,318
Mega CITADEL ADVISORS LLC $740,954 0.89% 69,313
Mega D. E. Shaw & Co., Inc. $673,352 0.81% 62,989
Mega UBS Group AG $663,655 0.80% 62,082
Large Squarepoint Ops LLC $555,238 0.67% 51,940
Mega JANE STREET GROUP, LLC $545,190 0.66% 51,000
Mid Pale Fire Capital SE $519,811 0.62% 48,626
Mega BANK OF AMERICA CORP /DE/ Bank $483,081 0.58% 45,190
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $465,977 0.56% 43,590
Mega Bank of New York Mellon Corp Bank $431,648 0.52% 40,379
Small CORSAIR CAPITAL MANAGEMENT, L.P. $402,467 0.48% 37,649
Mid SIMPLEX TRADING, LLC $334,789 0.40% 31,318
Small GatePass Capital, LLC $317,941 0.38% 29,742
Mega JANE STREET GROUP, LLC $304,932 0.37% 28,525
Mega MORGAN STANLEY $285,614 0.34% 26,718
Mid XTX Topco Ltd $248,296 0.30% 23,227
Mega Nuveen, LLC $240,033 0.29% 22,454
Mega RHUMBLINE ADVISERS $228,872 0.27% 21,410
Mega WELLS FARGO & COMPANY/MN $222,672 0.27% 20,830
Small Rothschild Wealth LLC $220,214 0.26% 20,600
Large BROWN ADVISORY INC $213,800 0.26% 20,000
Mid BAILARD, INC. $190,282 0.23% 17,800
Small Oxler Private Wealth LLC $181,783 0.22% 17,005
Mid IMC-Chicago, LLC $181,013 0.22% 16,933
Small GUIDANCE CAPITAL, INC $174,268 0.21% 16,302
Small Quent Capital, LLC $173,167 0.21% 16,199
Mid GSA CAPITAL PARTNERS LLP $172,076 0.21% 16,097
Large OSAIC HOLDINGS, INC. $171,040 0.21% 16,000
Mega CITADEL ADVISORS LLC $165,695 0.20% 15,500
Mega DEUTSCHE BANK AG\ Bank $156,298 0.19% 14,621
Micro Fermata Advisors, LLC $138,285 0.17% 12,936
Small Greenhaven Road Investment Management, L.P. $120,829 0.15% 11,303
Mega PRICE T ROWE ASSOCIATES INC /MD/ $119,749 0.14% 11,202
Mega Invesco Ltd. $119,031 0.14% 11,135
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $118,637 0.14% 11,098
Mega AMERICAN CENTURY COMPANIES INC $114,297 0.14% 10,692
Large Vident Advisory, LLC $111,069 0.13% 10,390
Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund $87,903 0.11% 8,223
Mega JPMORGAN CHASE & CO $75,706 0.09% 7,082
Mega Vanguard Global Advisers, LLC $61,381 0.07% 5,742
Large Police & Firemen's Retirement System of New Jersey Pension $60,387 0.07% 5,649
Small Capital Advisors, Ltd. LLC $53,450 0.06% 5,000
Large MetLife Investment Management, LLC $52,616 0.06% 4,922
Mega FMR LLC $50,520 0.06% 4,726
Large NEW YORK STATE COMMON RETIREMENT FUND Pension $47,036 0.06% 4,400
Mega BNP PARIBAS ARBITRAGE, SA $39,221 0.05% 3,669
Mega BARCLAYS PLC $34,987 0.04% 3,273
Large Russell Investments Group, Ltd. $18,514 0.02% 1,732
Mega Legal & General Group Plc $16,655 0.02% 1,558
Mid Tower Research Capital LLC (TRC) $16,334 0.02% 1,528
Mid Ameritas Investment Partners, Inc. $13,170 0.02% 1,232
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $10,005 0.01% 936
Mega CITIGROUP INC $8,755 0.01% 819
Mid Sterling Capital Management LLC $5,355 0.01% 501
Large Rockefeller Capital Management L.P. $5,345 0.01% 500
Mid GAMMA Investing LLC $2,287 0.00% 214
Large CWM, LLC $2,084 0.00% 195
Mid Optiver Holding B.V. $1,817 0.00% 170
Large JONES FINANCIAL COMPANIES LLLP $1,496 0.00% 140
Large NISA INVESTMENT ADVISORS, LLC $758 0.00% 71
Micro Torren Management, LLC $566 0.00% 53
Mega ROYAL BANK OF CANADA Bank $534 0.00% 50
Mid ROTHSCHILD INVESTMENT LLC $213 0.00% 20
Small Caitong International Asset Management Co., Ltd $149 0.00% 14
Small Essential Partners LLC $96 0.00% 9
Mega PNC FINANCIAL SERVICES GROUP, INC. $85 0.00% 8
Small Sunbelt Securities, Inc. Broker-Dealer $74 0.00% 7
Small CoreCap Advisors, LLC $53 0.00% 5
Mid Farther Finance Advisors, LLC $21 0.00% 2
Mid SBI Securities Co., Ltd. Broker-Dealer $10 0.00% 1
Small MORGAN DEMPSEY CAPITAL MANAGEMENT LLC $10 0.00% 1

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