Latest Period
Q2 2026
Security Snapshot
PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share (PESI) Institutional Ownership
CUSIP: 714157203
13F Institutional Holders and Ownership History from Q1 2014 to Q2 2026
Institutions Reporting
89
Shares (Excl. Options)
9,470,555
Price
$14.29
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- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- PESI on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 9,470,555
- Total 13F value
- $135,226,019
- Portfolio coverage rank
- 0%
- Share change
- +1,901,870
- Value change
- +$27,285,837
- Number of holders
- 89
- Shares outstanding
- 21,115,855
- SEC-reported price per share
- $16.83
- Insider filing price
- $16.83
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- PESI - PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share is tracked under CUSIP 714157203.
- 89 institutions reported positions in Q2 2026.
- 2 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 84 to 89 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $80,947,347 to $135,226,019.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 89 institutions filings for Q2 2026.
Security key
714157203
Latest holder period
Q2 2026
13F holders
89
13D/G owners
2
CIK / CUSIP context first
Open Q2 2026 holders
PESI full holder history
PERMA FIX ENVIRONMENTAL SERVICES INC SEC filings
PERMA FIX ENVIRONMENTAL SERVICES INC company facts
PERMA FIX ENVIRONMENTAL SERVICES INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 714157203:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
2
Security
PESI
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| MAK CAPITAL ONE LLC | 5.5% | $16,549,551 | 1,161,372 | MAK Capital Fund LP | 31 Jul 2026 | |||
| HOLD Alapkezelo Zrt. | 5.1% | $12,672,667 | 944,312 | HOLD Alapkezelo Zrt. | 31 Mar 2026 |
As of 30 Jun 2026, 89 institutional investors reported holding 9,470,555 shares of PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share (PESI). This represents 45% of the company’s total 21,115,855 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
41%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 5.9% | 1,252,756 | +7% | 0% | $17,901,883 |
| MAK CAPITAL ONE LLC | 4.9% | 1,032,958 | +12% | 2.1% | $14,760,970 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.8% | 811,743 | +6.9% | 0% | $11,599,807 |
| Prescott Group Capital Management, L.L.C. | 3.7% | 777,142 | 0% | 0.96% | $11,105,359 |
| Diamond Hill Capital Management, LLC (Investment Advisor) | 3% | 642,533 | +80% | 0.07% | $9,181,797 |
| KENNEDY CAPITAL MANAGEMENT LLC | 2.9% | 610,903 | 0.15% | $8,729,804 | |
| Potomac Capital Management, Inc. | 2.3% | 477,000 | +61% | 5% | $6,816,330 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.2% | 455,156 | +5.2% | 0% | $6,506,211 |
| HEARTLAND ADVISORS INC | 1.9% | 400,000 | 0% | 0.25% | $5,716,000 |
| STATE STREET CORP | 1.7% | 349,744 | +4.2% | 0% | $4,997,842 |
| DIMENSIONAL FUND ADVISORS LP | 0.9% | 191,063 | +17% | 0% | $2,728,619 |
| GOLDMAN SACHS GROUP INC | 0.77% | 162,755 | +14% | 0% | $2,325,768 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.74% | 156,934 | +1314% | 0% | $2,242,587 |
| CITADEL ADVISORS LLC | 0.72% | 152,626 | +120% | 0% | $2,181,025 |
| NORTHERN TRUST CORP | 0.67% | 141,639 | +9.3% | 0% | $2,024,021 |
| VANGUARD FIDUCIARY TRUST CO | 0.58% | 123,040 | +3.2% | 0% | $1,758,242 |
| GROUP ONE TRADING LLC | 0.58% | 122,611 | -50% | 0.05% | $1,752,111 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 0.57% | 121,267 | +21% | 0% | $1,732,905 |
| North Star Investment Management Corp. | 0.57% | 120,532 | 0% | 0.09% | $1,722,402 |
| Diametric Capital, LP | 0.54% | 114,714 | 0.17% | $1,639,263 | |
| MYDA Advisors LLC | 0.43% | 90,000 | -25% | 0.31% | $1,286,100 |
| CM WEALTH ADVISORS LLC | 0.42% | 87,839 | 0.23% | $1,255,219 | |
| XTX Topco Ltd | 0.3% | 62,888 | +171% | 0.01% | $898,670 |
| Owls Nest Partners IA, LLC | 0.27% | 56,555 | 0.26% | $808,171 | |
| Pale Fire Capital SE | 0.26% | 55,627 | +14% | 0.06% | $794,910 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
50
Latest
Q2 2026
Rows shown
1-25 of 50
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 9,470,555 | $135,226,019 | +$27,285,837 | $14.29 | 89 |
| 2026 Q1 | 7,568,995 | $80,947,347 | -$2,267,836 | $10.69 | 84 |
| 2025 Q4 | 7,876,466 | $99,237,170 | +$2,837,591 | $12.59 | 84 |
| 2025 Q3 | 7,420,583 | $75,014,874 | +$7,603,495 | $10.10 | 76 |
| 2025 Q2 | 6,691,336 | $70,394,269 | +$756,228 | $10.52 | 69 |
| 2025 Q1 | 6,667,505 | $48,473,520 | -$7,285,662 | $7.27 | 73 |
| 2024 Q4 | 7,369,619 | $81,581,927 | +$16,623,671 | $11.07 | 72 |
| 2024 Q3 | 5,776,549 | $71,171,783 | +$9,947,481 | $12.27 | 65 |
| 2024 Q2 | 4,817,296 | $48,798,859 | +$16,967,378 | $10.13 | 57 |
| 2024 Q1 | 3,103,687 | $36,902,768 | -$795,328 | $11.89 | 39 |
| 2023 Q4 | 3,489,166 | $27,424,623 | +$688,951 | $7.86 | 42 |
| 2023 Q3 | 3,347,901 | $34,983,351 | +$635,132 | $10.45 | 43 |
| 2023 Q2 | 3,261,925 | $35,815,855 | -$2,967,523 | $10.98 | 35 |
| 2023 Q1 | 3,528,811 | $41,568,323 | +$1,379,458 | $11.78 | 31 |
| 2022 Q4 | 3,580,560 | $12,641,713 | -$747,112 | $3.53 | 29 |
| 2022 Q3 | 3,792,329 | $16,989,000 | -$73,480 | $4.48 | 26 |
| 2022 Q2 | 3,795,688 | $19,698,000 | +$226,593 | $5.19 | 27 |
| 2022 Q1 | 3,751,593 | $20,746,000 | +$1,443,901 | $5.53 | 27 |
| 2021 Q4 | 3,485,599 | $22,062,000 | +$446,817 | $6.33 | 26 |
| 2021 Q3 | 3,209,497 | $21,344,000 | +$163,464 | $6.65 | 21 |
| 2021 Q2 | 3,184,433 | $22,768,000 | -$483,424 | $7.15 | 23 |
| 2021 Q1 | 3,251,492 | $23,841,000 | +$459,871 | $7.33 | 21 |
| 2020 Q4 | 3,195,829 | $19,078,000 | +$538,860 | $5.97 | 22 |
| 2020 Q3 | 3,072,479 | $21,658,967 | -$245,723 | $7.05 | 22 |
| 2020 Q2 | 3,109,024 | $19,860,556 | +$76,190 | $6.39 | 23 |