Security key
714157203
PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share (PESI)
CUSIP: 714157203
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Total 13F shares
- 9,470,507
- Total 13F value
- $135,225,333
- Share change
- +1,901,822
- Put/Call ratio
- 73%
- SEC-reported price per share
- $14.29
- Number of holders
- 88
- Value change
- +$27,285,151
- Number of buys
- 47
- Number of sells
- 25
- Shares outstanding
- 21,167,646
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
88
Top holders
10
PESI full security history
Ownership snapshot
Full 13F holder table
PERMA FIX ENVIRONMENTAL SERVICES INC SEC filings
PERMA FIX ENVIRONMENTAL SERVICES INC company facts
Broader feeds
Ownership snapshot
Top reported holders of PESI - PERMA FIX ENVIRONMENTAL SERVICES INC - Common Stock, $0.001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Louis F. Centofanti
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
31 Mar 2026
3/4/5
13F
Lead comparable stake: 1.3%
Showing 1-6 of 15 holder rows.
Quick read
Louis F. Centofanti leads the comparable SEC ownership view at 1.3%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Louis F. Centofanti's linked filing trail.
Comparable ownership
Top 5
Louis F. Centofanti
1.3%
Mark Duff
0.64%
BlackRock, Inc.
5.5%
MAK CAPITAL ONE LLC
4.3%
PRESCOTT GROUP CAPITAL MANAGEMENT...
3.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Louis F. Centofanti |
3/4/5
EVP of Strategic Initiatives, Director
|
1.3%
|
$3,905,484
280,365 shares
|
— | 17 Nov 2025 |
| Mark Duff |
3/4/5
President and CEO, Director
|
0.64%
|
$1,083,175
134,556 shares
|
— | 11 Sep 2025 |
| BlackRock, Inc. |
13F
Company
|
5.5%
|
$12,510,539
1,170,303 shares
|
— | 31 Mar 2026 |
| MAK CAPITAL ONE LLC |
13F
Company
|
4.3%
|
$9,820,614
918,673 shares
|
— | 31 Mar 2026 |
| PRESCOTT GROUP CAPITAL MANAGEMENT, L.L.C. |
13F
Company
|
3.7%
|
$8,307,648
777,142 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
3.6%
|
$8,118,360
759,435 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
88
Shares
9,470,507
Rows available
88
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
84
Q2 2026 holders
88
Holder diff
4
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|