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Perma-Fix Environmental Services Ownership | Who Owns Perma-Fix Environmental Services?

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Perma-Fix Environmental Services Ownership Summary

Perma-Fix Environmental Services is owned by 32.04% institutional investors, 7.34% insiders, and 60.62% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 6.49% of PESI shares. Vanguard Total Stock Mkt Idx Inv is the top mutual fund, with 2.85% of its assets in Perma-Fix Environmental Services shares.

PESI Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockPerma-Fix Environmental Services32.04%7.34%60.62%
SectorIndustrials Stocks 44.97%12.43%42.61%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Blackrock funding, inc. /de1.20M6.49%$15.08M
Blackrock853.16K6.24%$8.64M
Vanguard group968.11K5.24%$12.19M
Mak capital one815.58K4.42%$8.24M
Prescott group capital management777.14K4.21%$9.78M
Geode capital management422.89K2.29%$5.33M
Heartland advisors400.00K2.17%$5.04M
Diamond hill capital management386.84K2.09%$4.87M
Potomac capital management341.80K1.85%$4.30B
State street298.39K1.62%$3.01M

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Potomac capital management341.80K3.46%$4.30B
Mak capital one815.58K1.27%$8.24M
Prescott group capital management777.14K0.91%$9.78M
Perritt capital management175.30K0.84%$1.77M
Heartland advisors400.00K0.27%$5.04M
Eam investors64.78K0.09%$815.63K
Guidance capital17.18K0.06%$254.68K
Oxler private wealth17.00K0.06%$214.09K
Pale fire capital se45.27K0.05%$457.23K
Corsair capital management27.94K0.05%$282.22K

Top Buyers

HolderShares% AssetsChange
Mak capital one815.58K1.27%722.97K
Blackrock853.16K0.00%577.96K
Potomac capital management341.80K3.46%341.80K
Jane street group144.24K0.00%86.04K
Eam investors64.78K0.09%64.78K

Top Sellers

HolderShares% AssetsChange
Awm investment company---400.00K
Van eck associates---220.29K
Essex investment management---196.20K
Polar asset management partners---175.00K
Myda advisors---169.21K

New Positions

HolderShares% AssetsChangeValue
Potomac capital management341.80K3.46%341.80K$4.30B
Eam investors64.78K0.09%64.78K$815.63K
Trexquant investment lp42.16K0.00%42.16K$425.78K
Sei investments39.44K0.00%39.44K$496.57K
Corsair capital management27.94K0.05%27.94K$282.22K

Sold Out

HolderChange
Indiana trust & investment management-65.00
West paces advisors-125.00
Planned solutions-700.00
Raymond james financial-1.16K
Simplex trading-2.80K

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Dec 31, 202558-27.50%5,917,672-20.25%321.98%27-34.15%16-27.27%
Sep 30, 20257816.42%7,245,2769.93%393.08%4017.65%2110.53%
Jun 30, 202571-6.58%6,610,635-0.92%352.73%34-19.05%2025.00%
Mar 31, 202576-6,671,805-8.49%361.70%4216.67%17-26.09%
Dec 31, 202436-47.06%4,398,091-23.86%272.08%19-50.00%11-31.25%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Vanguard Total Stock Mkt Idx Inv526.32K2.85%-11.61K
Vanguard US Total Market Shares ETF442.12K2.40%-
iShares Russell 2000 ETF410.23K2.22%-
Heartland Value Investor400.00K2.17%-
Diamond Hill Small Cap Equity208.75K1.13%-409.00
VanEck Environmental Svcs ETF187.04K1.01%2.31K
Diamond Hill Small Cap Inv186.24K1.01%-
Vanguard Institutional Extnd Mkt Idx Tr177.51K0.96%-64.31K
Fidelity Small Cap Index172.85K0.94%730.00
Perritt MicroCap Opportunities Investor153.00K0.83%-10.00K

Recent Insider Transactions

DateNameRoleActivityValue
Sep 16, 2025Duggan Kerry C-Sell$48.62K
Sep 11, 2025Duff Mark President and CEOBuy$7.22K
Sep 11, 2025Shelton Larry-Buy$8.58K
Sep 09, 2025Shelton Larry-Buy$9.61K
May 30, 2025Duggan Kerry C-Sell$181.64K

Insider Transactions Trends

DateBuySell
2026 Q1--
2025 Q4--
2025 Q331
2025 Q2-1
2025 Q18-

PESI Ownership FAQ

Who owns the most shares of Perma-Fix Environmental Services?

Perma-Fix Environmental Services’s largest shareholders are Blackrock funding, inc. /de (1.2M shares, 6.49%), Blackrock (853.16K shares, 6.24%), and Vanguard group (968.11K shares, 5.24%). Together, they hold 17.96% of Perma-Fix Environmental Services’s total shares outstanding.

Does Blackrock own Perma-Fix Environmental Services?

Yes, BlackRock owns 6.24% of Perma-Fix Environmental Services, totaling 853.16K shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 8.64M$. In the last quarter, BlackRock increased its holdings by 577.96K shares, a 210.01% change.

Who is Perma-Fix Environmental Services’s biggest shareholder by percentage of total assets invested?

Potomac capital management is Perma-Fix Environmental Services’s biggest shareholder by percentage of total assets invested, with 3.46% of its assets in 341.8K Perma-Fix Environmental Services shares, valued at 4.3B$.

Who is the top mutual fund holder of Perma-Fix Environmental Services shares?

Vanguard Total Stock Mkt Idx Inv is the top mutual fund holder of Perma-Fix Environmental Services shares, with 2.85% of its total shares outstanding invested in 526.32K Perma-Fix Environmental Services shares.

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