PESINasdaqHazardous Waste ManagementFiscal year ends December 31
PERMA FIX ENVIRONMENTAL SERVICES INC
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 12, 2026
$12.06−0.25 (-2.03%)
Close on Oct 19, 2026
- Market cap
- $239.27M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
44.6%
9M of 21M shares
Institutional holders
89
15 new, 9 sold out
Net institutional buying
2M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| HOLD Alapkezelo Zrt. | 2,249,986 | 10.60% | 13G (passive) amendment | Aug 25, 2026 |
| MAK Capital Fund LP | 1,161,372 | 5.50% | 13G (passive) amendment | Jul 31, 2026 |
| Mak Capital One LLC | 1,161,372 | 5.50% | 13G (passive) | Jul 31, 2026 |
| BlackRock, Inc. | 1,006,818 | 6.40% | 13G (passive) | Sep 30, 2024 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of PESI | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 1,252,756 | 5.90% | $17.90M | +82,453 | 0.00% |
| Mak Capital One LLC | 1,032,958 | 4.87% | $14.76M | +114,285 | 2.07% |
| Vanguard Capital Management LLC | 811,743 | 3.83% | $11.60M | +52,308 | 0.00% |
| Prescott Group Capital Management, L.L.C. | 777,142 | 3.66% | $11.11M | – | 0.96% |
| Diamond Hill Capital Management Inc | 642,533 | 3.03% | $9.18M | +286,555 | 0.07% |
| Kennedy Capital Management LLC | 610,903 | 2.88% | $8.73M | New | 0.15% |
| Potomac Capital Management, Inc. | 477,000 | 2.25% | $6.82M | +180,300 | 4.65% |
| Geode Capital Management, LLC | 455,156 | 2.15% | $6.51M | +22,455 | 0.00% |
| Heartland Advisors Inc | 400,000 | 1.89% | $5.72M | – | 0.25% |
| State Street Corp | 349,744 | 1.65% | $5.00M | +14,197 | 0.00% |
| Dimensional Fund Advisors LP | 191,063 | 0.90% | $2.73M | +27,276 | 0.00% |
| Goldman Sachs Group Inc | 162,755 | 0.77% | $2.33M | +20,068 | 0.00% |
| Susquehanna International Group, Llp | 156,934 | 0.74% | $2.24M | +145,836 | 0.00% |
| Citadel Advisors LLC | 152,626 | 0.72% | $2.18M | +83,313 | 0.00% |
| Northern Trust Corp | 141,639 | 0.67% | $2.02M | +12,071 | 0.00% |
| Vanguard Fiduciary Trust Co | 123,040 | 0.58% | $1.76M | +3,787 | 0.00% |
| Group One Trading, L.P. | 122,611 | 0.58% | $1.75M | −125,063 | 0.00% |
| Vanguard Portfolio Management LLC | 121,267 | 0.57% | $1.73M | +20,949 | 0.00% |
| North Star Investment Management Corp. | 120,532 | 0.57% | $1.72M | – | 0.09% |
| Diametric Capital, LP | 114,714 | 0.54% | $1.64M | New | 0.17% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 89 | 9M | 44.6% | 15 / 34 | 17 / 9 | 2M | 0M |
| Q1 2026 | 85 | 8M | 35.7% | 17 / 20 | 26 / 13 | 2M | 1M |
| Q4 2025 | 84 | 8M | 37.1% | 14 / 22 | 28 / 7 | 1M | 1M |
| Q3 2025 | 77 | 7M | 35.0% | 16 / 27 | 20 / 7 | 1M | 1M |
| Q2 2025 | 69 | 7M | 31.5% | 7 / 28 | 20 / 13 | 1M | 1M |
| Q1 2025 | 75 | 7M | 31.8% | 12 / 30 | 17 / 9 | 1M | 1M |
| Q4 2024 | 73 | 7M | 34.7% | 15 / 22 | 24 / 10 | 2M | 1M |
| Q3 2024 | 68 | 6M | 27.3% | 16 / 24 | 16 / 5 | 2M | 0M |
| Q2 2024 | 58 | 5M | 22.8% | 23 / 19 | 8 / 6 | 2M | 0M |
| Q1 2024 | 41 | 3M | 14.7% | 4 / 11 | 14 / 5 | 0M | 0M |
| Q4 2023 | 43 | 3M | 16.5% | 9 / 15 | 13 / 9 | 0M | 0M |
| Q3 2023 | 43 | 3M | 15.8% | 17 / 11 | 9 / 11 | 1M | 1M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of PESI | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 597,751 | 2.82% | $8.54M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 460,188 | 2.17% | $6.58M | 0.01% | Jun 30, 2026 |
| Heartland Value Fund | 400,000 | 1.89% | $5.72M | 0.49% | Jun 30, 2026 |
| Diamond Hill Small Cap Fund | 290,866 | 1.37% | $4.16M | 1.35% | Jun 30, 2026 |
| Vanguard Extended Market Index Fund | 194,162 | 0.92% | $2.77M | 0.00% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund | 192,676 | 0.91% | $3.20M | 0.01% | Jul 31, 2026 |
| iShares Russell 2000 Growth ETF | 143,792 | 0.68% | $2.05M | 0.01% | Jun 30, 2026 |
| North Star Micro Cap Fund | 116,132 | 0.55% | $1.14M | 0.62% | May 31, 2026 |
| Fidelity Extended Market Index Fund | 91,100 | 0.43% | $894.60K | 0.00% | May 31, 2026 |
| Vanguard Russell 2000 Index Fund | 88,308 | 0.42% | $867.18K | 0.00% | May 31, 2026 |
| Acuitas US Microcap Fund | 83,337 | 0.39% | $1.19M | 1.01% | Jun 30, 2026 |
| iShares Micro-Cap ETF | 59,246 | 0.28% | $846.63K | 0.06% | Jun 30, 2026 |
| Dimensional U.S. Small Cap ETF | 57,280 | 0.27% | $950.85K | 0.01% | Jul 31, 2026 |
| Schwab Small-Cap Index Fund | 42,407 | 0.20% | $703.96K | 0.01% | Jul 31, 2026 |
| U.S. Small Cap Portfolio | 34,004 | 0.16% | $564.47K | 0.00% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Louis F. Centofanti | EVP of Strategic Initiatives, Director | 280,365 | 1.32% | Feb 10, 2026 |
| Mark Duff | President and CEO, Director | 134,556 | 0.63% | Sep 12, 2025 |
| Richard Grondin | EVP of Hanford & Int. Waste Op | 39,592 | 0.19% | Jan 21, 2026 |
| Ben Naccarato | Chief Financial Officer | 48,811 | 0.23% | Mar 24, 2025 |
| Troy Eshleman | Chief Operating Officer | 1,350 | 0.01% | Mar 19, 2025 |
| Joe Reeder | Director | 241,852 | 1.14% | Jul 24, 2026 |
| Joseph Timothy Grumski | Director | 67,661 | 0.32% | Jul 23, 2026 |
| Mark A. Zwecker | Director | 247,606 | 1.17% | Jul 23, 2026 |
| Zach Paul Wamp | Director | 53,473 | 0.25% | Jul 23, 2026 |
| Larry Shelton | Director | 198,983 | 0.94% | Jul 23, 2026 |
| Thomas Bostick | Director | 50,610 | 0.24% | Jul 23, 2026 |
| Kerry C. Duggan | Director | 7,640 | 0.04% | Jul 23, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Larry Shelton Director | Jul 13, 2026 | Option exercise | +2,400 | $4.60 | $11.04K | 198,983 |
| Joe Reeder Director | Jul 1, 2026 | Award | +1,458 | $10.72 | $15.63K | 239,345 |
| Kerry C. Duggan Director | Jul 1, 2026 | Award | +819 | $10.72 | $8.78K | 7,640 |
| Zach Paul Wamp Director | Jul 1, 2026 | Award | +849 | $10.72 | $9.10K | 53,473 |
| Larry Shelton Director | Jul 1, 2026 | Award | +1,365 | $10.72 | $14.63K | 196,583 |
| Joseph Timothy Grumski Director | Jul 1, 2026 | Award | +1,528 | $10.72 | $16.38K | 67,661 |
| Mark A. Zwecker Director | Jul 1, 2026 | Award | +1,167 | $10.72 | $12.51K | 247,606 |
| Thomas Bostick Director | Jul 1, 2026 | Award | +1,213 | $10.72 | $13.00K | 50,610 |
| Joseph Timothy Grumski Director | Apr 1, 2026 | Award | +2,105 | $8.02 | $16.88K | 66,133 |
| Larry Shelton Director | Apr 1, 2026 | Award | +1,824 | $8.02 | $14.63K | 195,218 |
| Kerry C. Duggan Director | Apr 1, 2026 | Award | +1,054 | $8.02 | $8.45K | 6,821 |
| Thomas Bostick Director | Apr 1, 2026 | Award | +1,559 | $8.02 | $12.50K | 49,397 |
| Zach Paul Wamp Director | Apr 1, 2026 | Award | +1,094 | $8.02 | $8.77K | 52,624 |
| Joe Reeder Director | Apr 1, 2026 | Award | +1,886 | $8.02 | $15.13K | 237,887 |
| Mark A. Zwecker Director | Apr 1, 2026 | Award | +1,520 | $8.02 | $12.19K | 244,039 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jan 20, 2026 | Option exercise | +5,000 | $7.01 | $35.05K | 39,592 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jan 20, 2026 | Tax withholding | −2,555 | $13.71 | $35.03K | 37,037 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jan 20, 2026 | Option exercise | +6,000 | $3.95 | $23.70K | 43,037 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jan 20, 2026 | Tax withholding | −1,729 | $13.71 | $23.70K | 41,308 |
| Joe Reeder Director | Jan 2, 2026 | Award | +1,549 | $9.44 | $14.62K | 236,001 |
| Mark A. Zwecker Director | Jan 2, 2026 | Award | +1,325 | $9.44 | $12.51K | 242,519 |
| Larry Shelton Director | Jan 2, 2026 | Award | +1,583 | $9.44 | $14.94K | 193,394 |
| Zach Paul Wamp Director | Jan 2, 2026 | Award | +964 | $9.44 | $9.10K | 51,530 |
| Kerry C. Duggan Director | Jan 2, 2026 | Award | +929 | $9.44 | $8.77K | 5,767 |
| Joseph Timothy Grumski Director | Jan 2, 2026 | Award | +1,840 | $9.44 | $17.37K | 64,028 |
| Thomas Bostick Director | Jan 2, 2026 | Award | +1,324 | $9.44 | $12.50K | 47,838 |
| Joe Reeder Director | Dec 15, 2025 | Gift | −1,090 | – | – | 236,270 |
| Joe Reeder Director | Dec 15, 2025 | Gift | −11,048 | – | – | 237,360 |
| Joe Reeder Director | Dec 15, 2025 | Gift | −364 | – | – | 234,452 |
| Joe Reeder Director | Dec 15, 2025 | Gift | −727 | – | – | 234,816 |
| Joe Reeder Director | Dec 15, 2025 | Gift | −727 | – | – | 235,543 |
| Louis F. Centofanti EVP of Strategic Initiatives, Director | Nov 17, 2025 | Gift | −600 | – | – | 217,565 |
| Louis F. Centofanti EVP of Strategic Initiatives, Director | Nov 17, 2025 | Gift | −600 | – | – | 218,165 |
| Mark A. Zwecker Director | Oct 1, 2025 | Award | +1,609 | $7.58 | $12.20K | 241,194 |
| Larry Shelton Director | Oct 1, 2025 | Award | +1,931 | $7.58 | $14.64K | 191,811 |
| Joseph Timothy Grumski Director | Oct 1, 2025 | Award | +2,228 | $7.58 | $16.89K | 62,188 |
| Thomas Bostick Director | Oct 1, 2025 | Award | +1,716 | $7.58 | $13.01K | 46,514 |
| Joe Reeder Director | Oct 1, 2025 | Award | +2,063 | $7.58 | $15.64K | 248,408 |
| Zach Paul Wamp Director | Oct 1, 2025 | Award | +1,201 | $7.58 | $9.10K | 50,566 |
| Kerry C. Duggan Director | Oct 1, 2025 | Award | +1,158 | $7.58 | $8.78K | 4,838 |
| Kerry C. Duggan Director | Sep 16, 2025 | Sale | −5,653 | $8.60 | $48.62K | 3,680 |
| Mark Duff President and CEO, Director | Sep 11, 2025 | Buy | +897 | $8.05 | $7.22K | 134,556 |
| Larry Shelton Director | Sep 11, 2025 | Buy | +1,000 | $8.58 | $8.58K | 189,880 |
| Larry Shelton Director | Sep 9, 2025 | Buy | +1,000 | $9.61 | $9.61K | 188,880 |
| Larry Shelton Director | Sep 2, 2025 | Option exercise | +2,400 | $4.19 | $10.06K | 187,880 |
| Mark A. Zwecker Director | Aug 28, 2025 | Option exercise | +2,400 | $4.19 | $10.06K | 239,585 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jul 14, 2025 | Tax withholding | −3,094 | $11.32 | $35.02K | 30,686 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jul 14, 2025 | Option exercise | +6,000 | $3.95 | $23.70K | 36,686 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jul 14, 2025 | Tax withholding | −2,094 | $11.32 | $23.70K | 34,592 |
| Richard Grondin EVP of Hanford & Int. Waste Op | Jul 14, 2025 | Option exercise | +5,000 | $7.01 | $35.05K | 33,780 |
| Kerry C. Duggan Director | Jul 1, 2025 | Award | +1,112 | $7.89 | $8.77K | 9,333 |
| Thomas Bostick Director | Jul 1, 2025 | Award | +1,584 | $7.89 | $12.50K | 44,798 |
| Joseph Timothy Grumski Director | Jul 1, 2025 | Award | +2,202 | $7.89 | $17.37K | 59,690 |
| Joe Reeder Director | Jul 1, 2025 | Award | +1,980 | $7.89 | $15.62K | 246,345 |
| Larry Shelton Director | Jul 1, 2025 | Award | +1,895 | $7.89 | $14.95K | 185,480 |
| Mark A. Zwecker Director | Jul 1, 2025 | Award | +1,586 | $7.89 | $12.51K | 237,185 |
| Zach Paul Wamp Director | Jul 1, 2025 | Award | +1,153 | $7.89 | $9.10K | 49,365 |
| Kerry C. Duggan Director | May 30, 2025 | Sale | −16,634 | – | – | 8,221 |
| Joseph Timothy Grumski Director | Apr 1, 2025 | Award | +3,095 | $5.45 | $16.87K | 57,758 |
| Zach Paul Wamp Director | Apr 1, 2025 | Award | +1,609 | $5.45 | $8.77K | 48,212 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Kerry C. Duggan Director | Sep 15, 2025 | 5,653 | $51.56K | Sep 16, 2025 | Director Fees |
| Kerry C. Duggan Director | May 29, 2025 | 16,634 | $180.15K | May 29, 2025 | Director Fees |
| Reeder Joe Director | May 17, 2023 | 25,394 | $290.00K | May 17, 2023 | open market |