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Mark A Zwecker
Insider
First SEC filing: July 2, 2026 · Latest: July 2, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
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 |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 1, 2026 | PESI | A | 1,038 | $11.74 | $12,186 | 248,644 Direct | +0.42% | Acquired | 32.5% (price as of 2026-10-02) |
| July 22, 2026 | PESI | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2026 | PESI | A | 1,167 | $10.72 | $12,510 | 247,606 Direct | +0.47% | Acquired | 45.1% (price as of 2026-10-02) |
| April 1, 2026 | PESI | A | 1,520 | $8.02 | $12,190 | 244,039 Direct | +0.63% | Acquired | 94.0% (price as of 2026-10-02) |
| Jan. 2, 2026 | PESI | A | 1,325 | $9.44 | $12,508 | 242,519 Direct | +0.55% | Acquired | 64.8% (price as of 2026-10-02) |
| Oct. 1, 2025 | PESI | A | 1,609 | $7.58 | $12,196 | 241,194 Direct | +0.67% | Acquired | 105.3% (price as of 2026-10-02) |
| Aug. 28, 2025 | PESI | M | 2,400 | $4.19 | $10,056 | 239,585 Direct | +1.01% | Acquired | 271.4% (price as of 2026-10-02) |
| Aug. 28, 2025 | PESI | M | 2,400 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 24, 2025 | PESI | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2025 | PESI | A | 1,586 | $7.89 | $12,514 | 237,185 Direct | +0.67% | Acquired | 97.2% (price as of 2026-10-02) |
| April 1, 2025 | PESI | A | 2,235 | $5.45 | $12,181 | 235,599 Direct | +0.96% | Acquired | 185.5% (price as of 2026-10-02) |
| Jan. 2, 2025 | PESI | A | 1,468 | $8.30 | $12,184 | 233,364 Direct | +0.63% | Acquired | 87.5% (price as of 2026-10-02) |
| Oct. 1, 2024 | PESI | A | 1,324 | $9.20 | $12,181 | 231,896 Direct | +0.57% | Acquired | 69.1% (price as of 2026-10-02) |
| Sept. 9, 2024 | PESI | M | 2,400 | $3.70 | $8,880 | 230,572 Direct | +1.05% | Acquired | 320.5% (price as of 2026-10-02) |
| Sept. 9, 2024 | PESI | M | 2,400 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| July 18, 2024 | PESI | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2024 | PESI | A | 1,690 | $7.60 | $12,844 | 228,172 Direct | +0.75% | Acquired | 104.7% (price as of 2026-10-02) |
| April 1, 2024 | PESI | A | 1,367 | $8.92 | $12,194 | 226,482 Direct | +0.61% | Acquired | 74.4% (price as of 2026-10-02) |
| Jan. 2, 2024 | PESI | A | 2,067 | $5.90 | $12,195 | 225,115 Direct | +0.93% | Acquired | 163.7% (price as of 2026-10-02) |
| Oct. 2, 2023 | PESI | A | 1,596 | $7.84 | $12,513 | 223,048 Direct | +0.72% | Acquired | 98.5% (price as of 2026-10-02) |
| July 20, 2023 | PESI | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 3, 2023 | PESI | A | 1,480 | $8.24 | $12,195 | 221,452 Direct | +0.67% | Acquired | 88.8% (price as of 2026-10-02) |
| April 25, 2023 | PESI | M | 2,400 | $2.78 | $6,672 | 219,972 Direct | +1.10% | Acquired | 459.7% (price as of 2026-10-02) |
| April 25, 2023 | PESI | M | 2,400 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 3, 2023 | PESI | A | 1,379 | $8.84 | $12,190 | 217,572 Direct | +0.64% | Acquired | 76.0% (price as of 2026-10-02) |
| Jan. 3, 2023 | PESI | A | 4,603 | $2.65 | $12,198 | 216,193 Direct | +2.18% | Acquired | 487.2% (price as of 2026-10-02) |
| Oct. 3, 2022 | PESI | A | 3,627 | $3.36 | $12,187 | 211,590 Direct | +1.74% | Acquired | 363.1% (price as of 2026-10-02) |
| July 21, 2022 | PESI | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2022 | PESI | A | 3,131 | $3.89 | $12,180 | 205,563 Direct | +1.55% | Acquired | 300.0% (price as of 2026-10-02) |
| April 1, 2022 | PESI | A | 2,939 | $4.15 | $12,197 | 202,432 Direct | +1.47% | Acquired | 274.9% (price as of 2026-10-02) |
| Jan. 3, 2022 | PESI | A | 2,636 | $4.75 | $12,521 | 199,493 Direct | +1.34% | Acquired | 227.6% (price as of 2026-10-02) |
| Oct. 1, 2021 | PESI | A | 2,509 | $4.99 | $12,520 | 196,857 Direct | +1.29% | Acquired | 211.8% (price as of 2026-10-02) |
| July 20, 2021 | PESI | A | 10,000 | · | · | 10,000 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2021 | PESI | A | 2,273 | $5.36 | $12,183 | 194,348 Direct | +1.18% | Acquired | 190.3% (price as of 2026-10-02) |
| April 1, 2021 | PESI | A | 2,217 | $5.50 | $12,194 | 192,075 Direct | +1.17% | Acquired | 182.9% (price as of 2026-10-02) |
| Jan. 4, 2021 | PESI | A | 2,105 | $4.48 | $9,430 | 189,858 Direct | +1.12% | Acquired | 247.3% (price as of 2026-10-02) |
| Oct. 1, 2020 | PESI | A | 1,783 | $5.29 | $9,432 | 187,753 Direct | +0.96% | Acquired | 194.1% (price as of 2026-10-02) |
| July 22, 2020 | PESI | A | 2,400 | $6.70 | $16,080 | 2,400 Direct | · | Acquired | 132.2% (price as of 2026-10-02) |
| July 1, 2020 | PESI | A | 2,034 | $4.79 | $9,743 | 185,970 Direct | +1.11% | Acquired | 224.8% (price as of 2026-10-02) |
| April 1, 2020 | PESI | A | 2,412 | $3.91 | $9,431 | 183,936 Direct | +1.33% | Acquired | 298.0% (price as of 2026-10-02) |
| Jan. 2, 2020 | PESI | A | 1,381 | $6.82 | $9,418 | 181,524 Direct | +0.77% | Acquired | 128.2% (price as of 2026-10-02) |
| Oct. 1, 2019 | PESI | A | 2,768 | $3.40 | $9,411 | 180,143 Direct | +1.56% | Acquired | 357.6% (price as of 2026-10-02) |
| July 25, 2019 | PESI | A | 2,400 | $3.31 | $7,944 | 2,400 Direct | · | Acquired | 370.1% (price as of 2026-10-02) |
| July 1, 2019 | PESI | A | 3,325 | $2.93 | $9,742 | 177,375 Direct | +1.91% | Acquired | 431.1% (price as of 2026-10-02) |
| April 1, 2019 | PESI | A | 3,827 | $2.63 | $10,065 | 174,050 Direct | +2.25% | Acquired | 491.6% (price as of 2026-10-02) |
| Jan. 2, 2019 | PESI | A | 5,348 | $1.76 | $9,412 | 170,223 Direct | +3.24% | Acquired | 784.1% (price as of 2026-10-02) |
| Oct. 1, 2018 | PESI | A | 2,992 | $3.15 | $9,425 | 164,875 Direct | +1.85% | Acquired | 394.0% (price as of 2026-10-02) |
| July 26, 2018 | PESI | A | 2,400 | · | · | 2,400 Direct | · | Acquired | (price as of 2026-10-02) |
| July 2, 2018 | PESI | A | 2,793 | $3.38 | $9,440 | 161,883 Direct | +1.76% | Acquired | 360.4% (price as of 2026-10-02) |
| April 2, 2018 | PESI | A | 3,028 | $3.11 | $9,417 | 159,090 Direct | +1.94% | Acquired | 400.3% (price as of 2026-10-02) |
| Jan. 2, 2018 | PESI | A | 3,443 | $2.74 | $9,434 | 156,062 Direct | +2.26% | Acquired | 467.9% (price as of 2026-10-02) |
| Oct. 2, 2017 | PESI | A | 3,649 | $2.85 | $10,400 | 152,619 Direct | +2.45% | Acquired | 446.0% (price as of 2026-10-02) |
| July 27, 2017 | PESI | A | 2,400 | $3.55 | $8,520 | 2,400 Direct | · | Acquired | 338.3% (price as of 2026-10-02) |
| July 3, 2017 | PESI | A | 3,562 | $2.74 | $9,760 | 148,970 Direct | +2.45% | Acquired | 467.9% (price as of 2026-10-02) |
| April 3, 2017 | PESI | A | 3,989 | $2.36 | $9,414 | 145,408 Direct | +2.82% | Acquired | 559.3% (price as of 2026-10-02) |
| Jan. 3, 2017 | PESI | A | 3,222 | $2.92 | $9,408 | 141,419 Direct | +2.33% | Acquired | 432.9% (price as of 2026-10-02) |
| Oct. 3, 2016 | PESI | A | 2,510 | $3.76 | $9,438 | 138,197 Direct | +1.85% | Acquired | 313.8% (price as of 2026-10-02) |
| July 28, 2016 | PESI | A | 2,400 | $4.60 | $11,040 | 2,400 Direct | · | Acquired | 238.3% (price as of 2026-10-02) |
| July 1, 2016 | PESI | A | 2,639 | $3.82 | $10,081 | 135,687 Direct | +1.98% | Acquired | 307.3% (price as of 2026-10-02) |
| April 1, 2016 | PESI | A | 3,514 | $2.78 | $9,769 | 133,048 Direct | +2.71% | Acquired | 459.7% (price as of 2026-10-02) |
| Jan. 4, 2016 | PESI | A | 3,145 | $2.79 | $8,775 | 129,534 Direct | +2.49% | Acquired | 457.7% (price as of 2026-10-02) |
| Oct. 1, 2015 | PESI | A | 3,333 | $3.02 | $10,066 | 126,389 Direct | +2.71% | Acquired | 415.2% (price as of 2026-10-02) |
| Sept. 17, 2015 | PESI | A | 2,400 | · | · | 2,400 Direct | · | Acquired | (price as of 2026-10-02) |
| July 1, 2015 | PESI | A | 3,412 | $2.86 | $9,758 | 123,056 Direct | +2.85% | Acquired | 444.1% (price as of 2026-10-02) |
| April 1, 2015 | PESI | A | 3,239 | $2.91 | $9,425 | 119,644 Direct | +2.78% | Acquired | 434.7% (price as of 2026-10-02) |
| Jan. 2, 2015 | PESI | A | 3,088 | $3.26 | $10,067 | 116,405 Direct | +2.73% | Acquired | 377.3% (price as of 2026-10-02) |
| Oct. 1, 2014 | PESI | A | 3,630 | $2.86 | $10,382 | 113,317 Direct | +3.31% | Acquired | 444.1% (price as of 2026-10-02) |
| Sept. 18, 2014 | PESI | A | 2,400 | $3.70 | $8,880 | 2,400 Direct | · | Acquired | 320.5% (price as of 2026-10-02) |
| July 1, 2014 | PESI | A | 2,920 | $3.45 | $10,074 | 109,687 Direct | +2.73% | Acquired | 351.0% (price as of 2026-10-02) |
| April 1, 2014 | PESI | A | 2,575 | $3.66 | $9,424 | 106,767 Direct | +2.47% | Acquired | 325.1% (price as of 2026-10-02) |
| Jan. 2, 2014 | PESI | A | 4,180 | $2.33 | $9,739 | 104,192 Direct | +4.18% | Acquired | 567.8% (price as of 2026-10-02) |
| Oct. 1, 2013 | PESI | A | 18,327 | $0.55 | $10,080 | 500,062 Direct | +3.80% | Acquired | 465.8% (price as of 2026-10-02) |
| Sept. 12, 2013 | PESI | A | 12,000 | $0.56 | $6,720 | 12,000 Direct | · | Acquired | 455.7% (price as of 2026-10-02) |
| July 1, 2013 | PESI | A | 36,111 | $0.27 | $9,750 | 481,735 Direct | +8.10% | Acquired | 1052.6% (price as of 2026-10-02) |
| April 1, 2013 | PESI | A | 15,852 | $0.62 | $9,828 | 445,624 Direct | +3.69% | Acquired | 401.9% (price as of 2026-10-02) |
| Jan. 2, 2013 | PESI | A | 19,087 | $0.51 | $9,734 | 429,772 Direct | +4.65% | Acquired | 510.2% (price as of 2026-10-02) |
| Oct. 1, 2012 | PESI | A | 13,333 | $0.78 | $10,400 | 410,685 Direct | +3.36% | Acquired | 299.0% (price as of 2026-10-02) |
| Sept. 13, 2012 | PESI | A | 12,000 | $1.10 | $13,200 | 12,000 Direct | · | Acquired | 182.9% (price as of 2026-10-02) |
| July 2, 2012 | PESI | A | 10,000 | $0.88 | $8,800 | 397,352 Direct | +2.58% | Acquired | 253.6% (price as of 2026-10-02) |
| April 3, 2012 | PESI | A | 7,358 | $1.19 | $8,756 | 387,352 Direct | +1.94% | Acquired | 161.5% (price as of 2026-10-02) |
| Jan. 3, 2012 | PESI | A | 7,548 | $1.16 | $8,756 | 379,995 Direct | +2.03% | Acquired | 168.3% (price as of 2026-10-02) |
| Oct. 1, 2011 | PESI | A | 9,750 | $0.90 | $8,775 | 372,446 Direct | +2.69% | Acquired | 245.8% (price as of 2026-10-02) |
| Aug. 24, 2011 | PESI | A | 12,000 | $1.41 | $16,920 | 12,000 Direct | · | Acquired | 120.7% (price as of 2026-10-02) |
| July 1, 2011 | PESI | A | 8,106 | $1.04 | $8,430 | 362,696 Direct | +2.29% | Acquired | 199.2% (price as of 2026-10-02) |
| April 1, 2011 | PESI | A | 8,035 | $1.13 | $9,080 | 354,590 Direct | +2.32% | Acquired | 175.4% (price as of 2026-10-02) |
| Jan. 4, 2011 | PESI | A | 7,178 | $1.22 | $8,757 | 346,555 Direct | +2.12% | Acquired | 155.1% (price as of 2026-10-02) |
| Oct. 1, 2010 | PESI | A | 7,525 | $1.25 | $9,406 | 339,377 Direct | +2.27% | Acquired | 149.0% (price as of 2026-10-02) |
| Sept. 29, 2010 | PESI | A | 12,000 | $1.68 | $20,160 | 12,000 Direct | · | Acquired | 85.2% (price as of 2026-10-02) |
| July 1, 2010 | PESI | A | 7,536 | $1.21 | $9,119 | 331,852 Direct | +2.32% | Acquired | 157.2% (price as of 2026-10-02) |
| April 1, 2010 | PESI | A | 5,223 | $1.68 | $8,775 | 324,316 Direct | +1.64% | Acquired | 85.2% (price as of 2026-10-02) |
| Jan. 4, 2010 | PESI | A | 4,963 | $1.70 | $8,437 | 319,093 Direct | +1.58% | Acquired | 83.1% (price as of 2026-10-02) |
| Dec. 10, 2009 | PESI | M | 5,000 | $1.25 | $6,250 | 314,130 Direct | +1.62% | Acquired | 149.0% (price as of 2026-10-02) |
| Dec. 10, 2009 | PESI | M | 5,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Oct. 1, 2009 | PESI | A | 5,000 | $1.76 | $8,800 | 309,130 Direct | +1.64% | Acquired | 76.8% (price as of 2026-10-02) |
| July 29, 2009 | PESI | A | 12,000 | $2.67 | $32,040 | 12,000 Direct | · | Acquired | 16.6% (price as of 2026-10-02) |
| July 1, 2009 | PESI | A | 4,656 | $1.82 | $8,474 | 304,130 Direct | +1.55% | Acquired | 71.0% (price as of 2026-10-02) |
| April 1, 2009 | PESI | A | 6,222 | $1.46 | $9,084 | 299,474 Direct | +2.12% | Acquired | 113.2% (price as of 2026-10-02) |
| Jan. 2, 2009 | PESI | A | 9,013 | $0.94 | $8,472 | 293,252 Direct | +3.17% | Acquired | 231.1% (price as of 2026-10-02) |
| Oct. 1, 2008 | PESI | A | 5,598 | $1.57 | $8,789 | 284,239 Direct | +2.01% | Acquired | 98.2% (price as of 2026-10-02) |
| Aug. 5, 2008 | PESI | A | 4,204 | $2.01 | $8,450 | 262,634 Direct | +1.63% | Acquired | 54.8% (price as of 2026-10-02) |
Showing latest 100 of 128 transactions
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 | $16.64 | July 22, 2036 | 10,000 | Acquired |
| Aug. 28, 2025 | PESI | Stock Option (Right to Buy) | Common Stock | $4.19 | Sept. 17, 2025 | 2,400 | Disposed |
| July 24, 2025 | PESI | Stock Option (Right to Buy) | Common Stock | $12.23 | July 24, 2035 | 10,000 | Acquired |
| Sept. 9, 2024 | PESI | Stock Option (Right to Buy) | Common Stock | $3.70 | Sept. 18, 2024 | 2,400 | Disposed |
| July 18, 2024 | PESI | Stock Option (Right to Buy) | Common Stock | $10.20 | July 18, 2034 | 10,000 | Acquired |
| July 20, 2023 | PESI | Stock Option (Right to Buy) | Common Stock | $9.81 | July 20, 2033 | 10,000 | Acquired |
| April 25, 2023 | PESI | Stock Option (Right to Buy) | Common Stock | $2.78 | Sept. 12, 2023 | 2,400 | Disposed |
| July 21, 2022 | PESI | Stock Option | Common Stock | $5.15 | July 21, 2032 | 10,000 | Acquired |
| July 20, 2021 | PESI | Stock Option | Common Stock | $5.93 | July 20, 2031 | 10,000 | Acquired |
| July 22, 2020 | PESI | Stock Option | Common Stock | $6.70 | July 22, 2030 | 2,400 | Acquired |
| July 25, 2019 | PESI | Stock Option | Common Stock | $3.31 | July 25, 2029 | 2,400 | Acquired |
| July 26, 2018 | PESI | Stock Option | Common Stock | $4.30 | July 26, 2028 | 2,400 | Acquired |
| July 27, 2017 | PESI | Stock Option | Common Stock | $3.55 | July 27, 2027 | 2,400 | Acquired |
| July 28, 2016 | PESI | Stock Option | Common Stock | $4.60 | July 28, 2026 | 2,400 | Acquired |
| Sept. 17, 2015 | PESI | Stock Option | Common Stock | $4.19 | Sept. 17, 2025 | 2,400 | Acquired |
| Sept. 18, 2014 | PESI | Stock Option | Common Stock | $3.70 | Sept. 18, 2024 | 2,400 | Acquired |
| Sept. 12, 2013 | PESI | Stock Option | Common Stock | $0.56 | Sept. 12, 2023 | 12,000 | Acquired |
| Sept. 13, 2012 | PESI | Stock Option | Common Stock | $1.10 | Sept. 13, 2022 | 12,000 | Acquired |
| Aug. 24, 2011 | PESI | Stock Option | Common Stock | $1.41 | Aug. 24, 2021 | 12,000 | Acquired |
| Sept. 29, 2010 | PESI | Stock Option | Common Stock | $1.68 | Sept. 29, 2020 | 12,000 | Acquired |
| Dec. 10, 2009 | PESI | Stock Option | Common Stock | $1.25 | Dec. 15, 2009 | 5,000 | Disposed |
| July 29, 2009 | PESI | Stock Option | Common Stock | $2.67 | July 29, 2019 | 12,000 | Acquired |
| Aug. 5, 2008 | PESI | Stock Option | Common Stock | $2.34 | Aug. 5, 2018 | 12,000 | Acquired |
| Aug. 2, 2007 | PESI | Stock Option | Common Stock | $2.95 | Aug. 2, 2017 | 12,000 | Acquired |
| July 27, 2006 | PESI | Stock Option | Common Stock | $2.15 | July 27, 2016 | 12,000 | Acquired |
| July 27, 2005 | PESI | Stock Option | Common Stock | $1.84 | July 27, 2015 | 12,000 | Acquired |
| July 28, 2004 | PESI | Stock Option | Common Stock | $1.70 | July 28, 2014 | 12,000 | Acquired |
| July 29, 2003 | PESI | Stock Option | Common Stock | $1.99 | July 29, 2013 | 12,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).