Mark A Zwecker
CIK 1256439 · View on SEC EDGAR ↗
Insider
First SEC filing: July 2, 2026 · Latest: July 2, 2026
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Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 78 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| July 22, 2026 | PESI | A | 10,000 | — | — | 10,000 Direct | — | Acquired | (price as of 2026-08-19) |
| July 1, 2026 | PESI | A | 1,167 | $10.72 | $12,510 | 247,606 Direct | +0.47% | Acquired | 62.9% (price as of 2026-08-19) |
| July 27, 2017 | PESI | A | 2,400 | $3.55 | $8,520 | 2,400 Direct | — | Acquired | 391.8% (price as of 2026-08-19) |
| July 3, 2017 | PESI | A | 3,562 | $2.74 | $9,760 | 148,970 Direct | +2.45% | Acquired | 537.2% (price as of 2026-08-19) |
| April 3, 2017 | PESI | A | 3,989 | $2.36 | $9,414 | 145,408 Direct | +2.82% | Acquired | 639.8% (price as of 2026-08-19) |
| Jan. 3, 2017 | PESI | A | 3,222 | $2.92 | $9,408 | 141,419 Direct | +2.33% | Acquired | 497.9% (price as of 2026-08-19) |
| Oct. 3, 2016 | PESI | A | 2,510 | $3.76 | $9,438 | 138,197 Direct | +1.85% | Acquired | 364.4% (price as of 2026-08-19) |
| July 28, 2016 | PESI | A | 2,400 | $4.60 | $11,040 | 2,400 Direct | — | Acquired | 279.6% (price as of 2026-08-19) |
| July 1, 2016 | PESI | A | 2,639 | $3.82 | $10,081 | 135,687 Direct | +1.98% | Acquired | 357.1% (price as of 2026-08-19) |
| April 1, 2016 | PESI | A | 3,514 | $2.78 | $9,769 | 133,048 Direct | +2.71% | Acquired | 528.1% (price as of 2026-08-19) |
| Jan. 4, 2016 | PESI | A | 3,145 | $2.79 | $8,775 | 129,534 Direct | +2.49% | Acquired | 525.8% (price as of 2026-08-19) |
| Oct. 1, 2015 | PESI | A | 3,333 | $3.02 | $10,066 | 126,389 Direct | +2.71% | Acquired | 478.1% (price as of 2026-08-19) |
| Sept. 17, 2015 | PESI | A | 2,400 | — | — | 2,400 Direct | — | Acquired | (price as of 2026-08-19) |
| July 1, 2015 | PESI | A | 3,412 | $2.86 | $9,758 | 123,056 Direct | +2.85% | Acquired | 510.5% (price as of 2026-08-19) |
| April 1, 2015 | PESI | A | 3,239 | $2.91 | $9,425 | 119,644 Direct | +2.78% | Acquired | 500.0% (price as of 2026-08-19) |
| Jan. 2, 2015 | PESI | A | 3,088 | $3.26 | $10,067 | 116,405 Direct | +2.73% | Acquired | 435.6% (price as of 2026-08-19) |
| Oct. 1, 2014 | PESI | A | 3,630 | $2.86 | $10,382 | 113,317 Direct | +3.31% | Acquired | 510.5% (price as of 2026-08-19) |
| Sept. 18, 2014 | PESI | A | 2,400 | $3.70 | $8,880 | 2,400 Direct | — | Acquired | 371.9% (price as of 2026-08-19) |
| July 1, 2014 | PESI | A | 2,920 | $3.45 | $10,074 | 109,687 Direct | +2.73% | Acquired | 406.1% (price as of 2026-08-19) |
| April 1, 2014 | PESI | A | 2,575 | $3.66 | $9,424 | 106,767 Direct | +2.47% | Acquired | 377.0% (price as of 2026-08-19) |
| Jan. 2, 2014 | PESI | A | 4,180 | $2.33 | $9,739 | 104,192 Direct | +4.18% | Acquired | 649.4% (price as of 2026-08-19) |
| Oct. 1, 2013 | PESI | A | 18,327 | $0.55 | $10,080 | 500,062 Direct | +3.80% | Acquired | 534.9% (price as of 2026-08-19) |
| Sept. 12, 2013 | PESI | A | 12,000 | $0.56 | $6,720 | 12,000 Direct | — | Acquired | 523.6% (price as of 2026-08-19) |
| July 1, 2013 | PESI | A | 36,111 | $0.27 | $9,750 | 481,735 Direct | +8.10% | Acquired | 1193.3% (price as of 2026-08-19) |
| April 1, 2013 | PESI | A | 15,852 | $0.62 | $9,828 | 445,624 Direct | +3.69% | Acquired | 463.2% (price as of 2026-08-19) |
| Jan. 2, 2013 | PESI | A | 19,087 | $0.51 | $9,734 | 429,772 Direct | +4.65% | Acquired | 584.7% (price as of 2026-08-19) |
| Oct. 1, 2012 | PESI | A | 13,333 | $0.78 | $10,400 | 410,685 Direct | +3.36% | Acquired | 347.7% (price as of 2026-08-19) |
| Sept. 13, 2012 | PESI | A | 12,000 | $1.10 | $13,200 | 12,000 Direct | — | Acquired | 217.5% (price as of 2026-08-19) |
| July 2, 2012 | PESI | A | 10,000 | $0.88 | $8,800 | 397,352 Direct | +2.58% | Acquired | 296.8% (price as of 2026-08-19) |
| April 3, 2012 | PESI | A | 7,358 | $1.19 | $8,756 | 387,352 Direct | +1.94% | Acquired | 193.4% (price as of 2026-08-19) |
| Jan. 3, 2012 | PESI | A | 7,548 | $1.16 | $8,756 | 379,995 Direct | +2.03% | Acquired | 201.0% (price as of 2026-08-19) |
| Oct. 1, 2011 | PESI | A | 9,750 | $0.90 | $8,775 | 372,446 Direct | +2.69% | Acquired | 288.0% (price as of 2026-08-19) |
| Aug. 24, 2011 | PESI | A | 12,000 | $1.41 | $16,920 | 12,000 Direct | — | Acquired | 147.7% (price as of 2026-08-19) |
| July 1, 2011 | PESI | A | 8,106 | $1.04 | $8,430 | 362,696 Direct | +2.29% | Acquired | 235.8% (price as of 2026-08-19) |
| April 1, 2011 | PESI | A | 8,035 | $1.13 | $9,080 | 354,590 Direct | +2.32% | Acquired | 209.0% (price as of 2026-08-19) |
| Jan. 4, 2011 | PESI | A | 7,178 | $1.22 | $8,757 | 346,555 Direct | +2.12% | Acquired | 186.2% (price as of 2026-08-19) |
| Oct. 1, 2010 | PESI | A | 7,525 | $1.25 | $9,406 | 339,377 Direct | +2.27% | Acquired | 179.4% (price as of 2026-08-19) |
| Sept. 29, 2010 | PESI | A | 12,000 | $1.68 | $20,160 | 12,000 Direct | — | Acquired | 107.9% (price as of 2026-08-19) |
| July 1, 2010 | PESI | A | 7,536 | $1.21 | $9,119 | 331,852 Direct | +2.32% | Acquired | 188.6% (price as of 2026-08-19) |
| April 1, 2010 | PESI | A | 5,223 | $1.68 | $8,775 | 324,316 Direct | +1.64% | Acquired | 107.9% (price as of 2026-08-19) |
| Jan. 4, 2010 | PESI | A | 4,963 | $1.70 | $8,437 | 319,093 Direct | +1.58% | Acquired | 105.4% (price as of 2026-08-19) |
| Dec. 10, 2009 | PESI | M | 5,000 | $1.25 | $6,250 | 314,130 Direct | +1.62% | Acquired | 179.4% (price as of 2026-08-19) |
| Dec. 10, 2009 | PESI | M | 5,000 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-19) |
| Oct. 1, 2009 | PESI | A | 5,000 | $1.76 | $8,800 | 309,130 Direct | +1.64% | Acquired | 98.4% (price as of 2026-08-19) |
| July 29, 2009 | PESI | A | 12,000 | $2.67 | $32,040 | 12,000 Direct | — | Acquired | 30.8% (price as of 2026-08-19) |
| July 1, 2009 | PESI | A | 4,656 | $1.82 | $8,474 | 304,130 Direct | +1.55% | Acquired | 91.9% (price as of 2026-08-19) |
| April 1, 2009 | PESI | A | 6,222 | $1.46 | $9,084 | 299,474 Direct | +2.12% | Acquired | 139.2% (price as of 2026-08-19) |
| Jan. 2, 2009 | PESI | A | 9,013 | $0.94 | $8,472 | 293,252 Direct | +3.17% | Acquired | 271.5% (price as of 2026-08-19) |
| Oct. 1, 2008 | PESI | A | 5,598 | $1.57 | $8,789 | 284,239 Direct | +2.01% | Acquired | 122.4% (price as of 2026-08-19) |
| Aug. 5, 2008 | PESI | A | 4,204 | $2.01 | $8,450 | 262,634 Direct | +1.63% | Acquired | 73.7% (price as of 2026-08-19) |
| Aug. 5, 2008 | PESI | A | 4,737 | $1.85 | $8,763 | 267,371 Direct | +1.80% | Acquired | 88.8% (price as of 2026-08-19) |
| Aug. 5, 2008 | PESI | A | 7,222 | $1.22 | $8,811 | 274,593 Direct | +2.70% | Acquired | 186.2% (price as of 2026-08-19) |
| Aug. 5, 2008 | PESI | A | 4,048 | $2.17 | $8,784 | 278,641 Direct | +1.47% | Acquired | 60.9% (price as of 2026-08-19) |
| Aug. 5, 2008 | PESI | A | 12,000 | $2.34 | $28,080 | 12,000 Direct | — | Acquired | 49.2% (price as of 2026-08-19) |
| Aug. 2, 2007 | PESI | A | 3,881 | $1.55 | $6,016 | 245,500 Direct | +1.61% | Acquired | 125.3% (price as of 2026-08-19) |
| Aug. 2, 2007 | PESI | A | 4,203 | $1.74 | $7,313 | 249,703 Direct | +1.71% | Acquired | 100.7% (price as of 2026-08-19) |
| Aug. 2, 2007 | PESI | A | 4,916 | $1.78 | $8,750 | 254,619 Direct | +1.97% | Acquired | 96.2% (price as of 2026-08-19) |
| Aug. 2, 2007 | PESI | A | 3,811 | $2.30 | $8,765 | 258,430 Direct | +1.50% | Acquired | 51.8% (price as of 2026-08-19) |
| Aug. 2, 2007 | PESI | A | 12,000 | $2.95 | $35,400 | 12,000 Direct | — | Acquired | 18.4% (price as of 2026-08-19) |
| July 27, 2006 | PESI | A | 1,773 | $1.65 | $2,925 | 235,411 Direct | +0.76% | Acquired | 111.6% (price as of 2026-08-19) |
| July 27, 2006 | PESI | A | 2,335 | $1.25 | $2,919 | 237,746 Direct | +0.99% | Acquired | 179.4% (price as of 2026-08-19) |
| July 27, 2006 | PESI | A | 2,042 | $1.43 | $2,920 | 239,788 Direct | +0.86% | Acquired | 144.2% (price as of 2026-08-19) |
| July 27, 2006 | PESI | A | 1,831 | $1.60 | $2,930 | 241,619 Direct | +0.76% | Acquired | 118.3% (price as of 2026-08-19) |
| July 27, 2006 | PESI | A | 12,000 | $2.15 | $25,800 | 12,000 Direct | — | Acquired | 62.4% (price as of 2026-08-19) |
| July 27, 2005 | PESI | A | 2,422 | $1.21 | $2,931 | 227,296 Direct | +1.08% | Acquired | 188.6% (price as of 2026-08-19) |
| July 27, 2005 | PESI | A | 2,156 | $1.36 | $2,932 | 229,452 Direct | +0.95% | Acquired | 156.8% (price as of 2026-08-19) |
| July 27, 2005 | PESI | A | 2,155 | $1.36 | $2,931 | 231,607 Direct | +0.94% | Acquired | 156.8% (price as of 2026-08-19) |
| July 27, 2005 | PESI | A | 2,031 | $1.44 | $2,925 | 233,638 Direct | +0.88% | Acquired | 142.5% (price as of 2026-08-19) |
| July 27, 2005 | PESI | A | 12,000 | $1.84 | $22,080 | 12,000 Direct | — | Acquired | 89.8% (price as of 2026-08-19) |
| July 28, 2004 | PESI | A | 1,726 | $1.70 | $2,934 | 222,695 Direct | +0.78% | Acquired | 105.4% (price as of 2026-08-19) |
| July 28, 2004 | PESI | A | 2,179 | $1.34 | $2,920 | 224,874 Direct | +0.98% | Acquired | 160.6% (price as of 2026-08-19) |
| July 28, 2004 | PESI | A | 12,000 | $1.70 | $20,400 | 74,000 Direct | +19.35% | Acquired | 105.4% (price as of 2026-08-19) |
| July 27, 2004 | PESI | A | 2,400 | $1.88 | $4,512 | 211,253 Direct | +1.15% | Acquired | 85.7% (price as of 2026-08-19) |
| July 27, 2004 | PESI | A | 2,927 | $1.54 | $4,508 | 214,180 Direct | +1.39% | Acquired | 126.8% (price as of 2026-08-19) |
| July 27, 2004 | PESI | A | 3,226 | $1.40 | $4,516 | 217,406 Direct | +1.51% | Acquired | 149.4% (price as of 2026-08-19) |
| July 27, 2004 | PESI | A | 2,309 | $1.27 | $2,932 | 219,715 Direct | +1.06% | Acquired | 175.0% (price as of 2026-08-19) |
| July 27, 2004 | PESI | A | 1,254 | $2.33 | $2,922 | 220,969 Direct | +0.57% | Acquired | 49.9% (price as of 2026-08-19) |
| July 29, 2003 | PESI | A | 12,000 | — | — | 12,000 Direct | — | Acquired | (price as of 2026-08-19) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| July 22, 2026 | PESI | Stock Option (Right to Buy) | Common Stock (10,000) | $16.64 | July 22, 2036 | 10,000 | Acquired |
| July 27, 2017 | PESI | Stock Option | Common Stock (2,400) | $3.55 | July 27, 2027 | 2,400 | Acquired |
| July 28, 2016 | PESI | Stock Option | Common Stock (2,400) | $4.60 | July 28, 2026 | 2,400 | Acquired |
| Sept. 17, 2015 | PESI | Stock Option | Common Stock (2,400) | $4.19 | Sept. 17, 2025 | 2,400 | Acquired |
| Sept. 18, 2014 | PESI | Stock Option | Common Stock (2,400) | $3.70 | Sept. 18, 2024 | 2,400 | Acquired |
| Sept. 12, 2013 | PESI | Stock Option | Common Stock (12,000) | $0.56 | Sept. 12, 2023 | 12,000 | Acquired |
| Sept. 13, 2012 | PESI | Stock Option | Common Stock (12,000) | $1.10 | Sept. 13, 2022 | 12,000 | Acquired |
| Aug. 24, 2011 | PESI | Stock Option | Common Stock (12,000) | $1.41 | Aug. 24, 2021 | 12,000 | Acquired |
| Sept. 29, 2010 | PESI | Stock Option | Common Stock (12,000) | $1.68 | Sept. 29, 2020 | 12,000 | Acquired |
| Dec. 10, 2009 | PESI | Stock Option | Common Stock (5,000) | $1.25 | Dec. 15, 2009 | 5,000 | Disposed |
| July 29, 2009 | PESI | Stock Option | Common Stock (12,000) | $2.67 | July 29, 2019 | 12,000 | Acquired |
| Aug. 5, 2008 | PESI | Stock Option | Common Stock (12,000) | $2.34 | Aug. 5, 2018 | 12,000 | Acquired |
| Aug. 2, 2007 | PESI | Stock Option | Common Stock (12,000) | $2.95 | Aug. 2, 2017 | 12,000 | Acquired |
| July 27, 2006 | PESI | Stock Option | Common Stock (12,000) | $2.15 | July 27, 2016 | 12,000 | Acquired |
| July 27, 2005 | PESI | Stock Option | Common Stock (12,000) | $1.84 | July 27, 2015 | 12,000 | Acquired |
| July 28, 2004 | PESI | Stock Option | Common Stock (12,000) | $1.70 | July 28, 2014 | 12,000 | Acquired |
| July 29, 2003 | PESI | Stock Option | Common Stock (12,000) | $1.99 | July 29, 2013 | 12,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).