PESI Institutional Ownership
Who owns Perma Fix Environmental Services Inc and what the big funds did with it last quarter, from every SEC 13F filing. 89 funds reported holding PESI at Jun 30, 2026, together owning 44.6% of the company.
- ▲48 buying vs 26 selling
- ▲Held by funds +9.0 pts
- ▲Funds holding +4
- ▲Superinvestors: 1 added, 0 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 89 | 85 | +4.7% |
| In funds' top 10 | 2 | 1 | +100.0% |
| 13F shares | 9.5M | 7.6M | +25.1% |
| Held by funds | 44.6% | 35.7% | +9.0 pts |
| New positions | 14 | 13 | +7.7% |
| Increased | 34 | 20 | +70.0% |
| Reduced | 17 | 25 | −32.0% |
| Sold out | 9 | 13 | −30.8% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in PESI
All superinvestors →
Who owns PESI
share of fund held shares- Index and passive funds36.9%
- Active managers and hedge funds56.6%
- Banks and brokers6.3%
- Pensions, insurers and other0.1%
The top 10 holders own 71.9% of all PESI shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
12 funds changed their position- Prescott Group Capital Management, L.L.C.Trimmed−597K sh
- CenterBook Partners LPNew+359K sh
- Exchange Traded Concepts, LLCNew+79K sh
- Creative PlanningNew+23K sh
- Oxler Private Wealth LLCSold out−17K sh
🔒 Free account: see all 12.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 5.90% | 1.3M | $17.9M | +82K |
| 2 | Mak Capital One LLC | 4.87% | 1M | $14.8M | +114K |
| 3 | Vanguard Capital Management LLC | 3.83% | 812K | $11.6M | +52K |
| 4 | Prescott Group Capital Management, L.L.C. | 3.66% | 777K | $11.1M | 0 |
| 5 | Diamond Hill Capital Management, LLC (Investment Advisor) | 3.03% | 643K | $9.2M | +287K |
| 6 | Kennedy Capital Management LLC | 2.88% | 611K | $8.7M | +611K |
| 7 | Potomac Capital Management, Inc. | 2.25% | 477K | $6.8M | +180K |
| 8 | Geode Capital Management, LLC | 2.15% | 455K | $6.5M | +22K |
| 9 | Heartland Advisors Inc | 1.89% | 400K | $5.7M | 0 |
| 10 | State Street Corp | 1.65% | 350K | $5M | +14K |
- Kennedy Capital Management LLC+611K sh+$8.7M
- Diamond Hill Capital Management, LLC (Investment Advisor)+287K sh+$4.1M
- Potomac Capital Management, Inc.+180K sh+$2.6M
- Susquehanna International Group, LLP+146K sh+$2.1M
- Diametric Capital, LP+115K sh+$1.6M
- Mak Capital One LLC+114K sh+$1.6M
- CM Wealth Advisors LLC+88K sh+$1.3M
- Citadel Advisors LLC+83K sh+$1.2M
- Group One Trading LLC−125K sh−$1.8M
- D. E. Shaw & Co., Inc.−38K sh−$545K
- UBS Group AG−31K sh−$437K
- MYDA Advisors LLC−30K sh−$429K
- Squarepoint Ops LLC−21K sh−$300K
- Gsa Capital Partners LLP−16K sh−$172K
- Fermata Advisors, LLC−13K sh−$138K
- Greenhaven Road Investment Management, L.P.−11K sh−$120K
PESI institutional ownership FAQ
Who owns the most PESI stock?
In Q2 2026 13F filings the largest holder of PESI was BlackRock, Inc., followed by Mak Capital One LLC and Vanguard Capital Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of PESI is owned by institutions?
Funds that file 13F reports held 44.6% of PESI's shares at Jun 30, 2026, compared with 35.7% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying PESI?
In Q2 2026, 48 funds bought PESI (14 of them new positions) and 26 sold (9 sold out completely). Among well known investors, 1 added and 0 cut. Our fund sentiment for PESI is strongly bullish.
What is PESI's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this PESI ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.