PERMA-FIX ENVIRONMENTAL SVCS (PESI) Institutional Ownership Changes & 13F Activity

PERMA-FIX ENVIRONMENTAL SVCS (PESI). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Kennedy Capital Management Llc, Potomac Capital Management, Inc., Susquehanna International Group, Llp, Group One Trading Llc, and Diametric Capital, Lp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
State Street CorpBuy+14,197+4.2%349,744$5.00MQ2 2026Sep 22, 2026
Citadel Advisors LlcBuy+83,313+120.2%152,626$2.18MQ2 2026Sep 02, 2026
California State Teachers Retirement SystemSell-693-74.0%243$3.47KQ2 2026Aug 24, 2026
Kennedy Capital Management LlcBuy+610,903—610,903$8.73MQ2 2026Aug 14, 2026
Potomac Capital Management, Inc.Buy+180,300+60.8%477,000$6.82MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+145,836+1314.1%156,934$2.24MQ2 2026Aug 14, 2026
Group One Trading LlcSell-125,063-50.5%122,611$1.75MQ2 2026Aug 14, 2026
Diametric Capital, LpBuy+114,714—114,714$1.64MQ2 2026Aug 14, 2026
Mak Capital One LlcBuy+114,285+12.4%1,032,958$14.76MQ2 2026Aug 14, 2026
Sei Investments CoBuy+41,022—41,022$586.20KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+39,661+170.8%62,888$898.67KQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Sell-38,131-60.5%24,858$355.22KQ2 2026Aug 14, 2026
Alliancebernstein L.P.Buy+32,850—32,850$351.17KQ2 2026Aug 14, 2026
Trexquant Investment LpBuy+21,948—21,948$313.64KQ2 2026Aug 14, 2026
Squarepoint Ops LlcSell-20,964-40.4%30,976$442.65KQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+20,068+14.1%162,755$2.33MQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+18,126+63.5%46,651$666.64KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+8,473+40.7%29,303$418.74KQ2 2026Aug 14, 2026
Corsair Capital Management, L.P.Buy+5,000+13.3%42,649$609.45KQ2 2026Aug 14, 2026
Metlife Investment Management, LlcBuy+4,488+91.2%9,410$134.47KQ2 2026Aug 14, 2026
Bank Of America CorpSell-3,819-8.5%41,371$591.19KQ2 2026Aug 14, 2026
Brown Advisory IncBuy+3,333+16.7%23,333$333.43KQ2 2026Aug 14, 2026
Charles Schwab Investment Management IncBuy+1,659+3.8%45,249$646.61KQ2 2026Aug 14, 2026
Barclays PlcSell-565-17.3%2,708$38.70KQ2 2026Aug 14, 2026
Royal Bank Of CanadaBuy+529+1058.0%579$9.00KQ2 2026Aug 14, 2026
Price T Rowe Associates IncBuy+479+4.3%11,681$167.00KQ2 2026Aug 14, 2026
Mirae Asset Global Etfs Holdings Ltd.Sell-108-1.3%8,115$115.96KQ2 2026Aug 14, 2026
Osaic Holdings, Inc.Sell-100-0.6%15,900$227.21KQ2 2026Aug 14, 2026
Owls Nest Partners Ia, LlcBuy+56,555—56,555$808.17KQ2 2026Aug 13, 2026
Vanguard Capital Management LlcBuy+52,308+6.9%811,743$11.60MQ2 2026Aug 13, 2026
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Frequently asked questions about PESI activity

  • Which institutional owners are buying PESI?

    Institutional owners buying PESI include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in PESI activity?

    "Buy" means an investor increased their reported position in PESI compared to the prior reporting period. This reflects growing exposure to PERMA-FIX ENVIRONMENTAL SVCS (PESI) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in PESI increasing?

    Institutional interest in PESI can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.