| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 1 | +2,000 | 0.61% | $233.50 | +$467,000 |
| Sells | 10 | -326,127 | 99% | $264.53 | -$86,269,733 |
| Net | -9 | -324,127 | -99% | -$85,802,733 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| Alan S. Mckim | EXEC CHAIR, CTO., Director | $657,923,842 | -$79,825,950 | -11% | 04 Mar 2026 |
| Michael Louis Battles | CO-CEO, Director | $23,139,893 | +$467,000 | +2.1% | 01 Feb 2026 |
| Brian P. Weber | Evp (Chesi) | $13,187,155 | -$689,461 | -5% | 01 Feb 2026 |
| George L. Curtis | Exec. Vice President (Chesi) | $12,323,632 | 02 Feb 2026 | ||
| Eric W. Gerstenberg | Co Ceo | $12,039,577 | -$2,663,388 | -18% | 23 Feb 2026 |
| Sharon M. Gabriel | Evp/Cio (Chesi) | $6,542,049 | -$998,528 | -13% | 20 Feb 2026 |
| Michael J. Twohig | Evp (Chesi) | $5,147,223 | 27 Mar 2023 | ||
| Thomas J. Shields | Director | $5,130,278 | 25 May 2022 | ||
| Edward G. Galante | Director | $4,814,434 | 21 May 2025 | ||
| Rebecca Underwood | President & Evp Facilities | $4,738,840 | 01 Feb 2026 | ||
| Eric J. Dugas | Evp Chief Financial Officer | $4,482,112 | -$784,292 | -15% | 20 Feb 2026 |
| Jeroen Diderich | EVP&President of Sales&Service | $4,186,640 | 01 Feb 2026 | ||
| Robert Speights | President, Industrial Services | $3,726,671 | -$233,517 | -5.9% | 27 May 2025 |
| Loan Nguyen Mansy | President Env Sales & Service | $3,061,364 | 21 Aug 2023 | ||
| Rod Marlin | Director | $2,930,084 | 10 May 2021 | ||
| John R. Welch | Director | $2,795,417 | -$490,440 | -15% | 19 Feb 2026 |
| Lauren States | Director | $2,669,601 | -$189,078 | -6.6% | 13 Nov 2025 |
| Charles H. Geer II | EVP, Industrial Services | $2,570,604 | 01 Feb 2026 | ||
| Andrea Robertson | Director | $2,219,887 | -$195,323 | -8.1% | 05 Aug 2025 |
| Robert Willett | Director | $1,819,506 | 21 May 2025 | ||
| Melkeya McDuffie | Evp, Human Resources Officer | $1,800,467 | 24 May 2023 | ||
| Robert W. Harrison | Evp, Ehs | $1,649,332 | 01 Feb 2026 | ||
| John T. Preston | Director | $1,240,431 | 21 May 2025 | ||
| Marcy L. Reed | Director | $1,148,253 | 21 May 2025 | ||
| Eugene G. Banucci | Director | $998,515 | 09 Jun 2023 | ||
| Shelley Stewart Jr. | Director | $751,206 | 21 May 2025 | ||
| Alison A. Quirk | Director | $666,148 | -$199,755 | -23% | 05 Jun 2025 |
| Karyn Polito | Director | $585,090 | 21 May 2025 | ||
| Jeffrey H. Knapp | Evp Hr (Chesi) | $508,890 | 23 Nov 2021 |
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Alan S. Mckim | CLH | Common Stock | Sale | -4.62% | $29,265,000 | $292.65 | -100,000 | 2,065,368 | 04 Mar 2026 | McKim 2007 Trust |
| Eric W. Gerstenberg | CLH | Common Stock | Sale | -5.49% | $699,650 | $279.86 | -2,500 | 43,020 | 23 Feb 2026 | Direct |
| Sharon M. Gabriel | CLH | Common Stock | Sale | -13.2% | $998,528 | $282.07 | -3,540 | 23,193 | 20 Feb 2026 | Direct |
| Eric J. Dugas | CLH | Common Stock | Sale | -14.9% | $784,292 | $281.31 | -2,788 | 15,933 | 20 Feb 2026 | Direct |
| Alan S. Mckim | CLH | Common Stock | Gift | -0.44% | -10,000 | 2,265,368 | 19 Feb 2026 | McKim 2007 Trust | ||
| Alan S. Mckim | CLH | Common Stock | Sale | -4.21% | $28,114,000 | $281.14 | -100,000 | 2,275,368 | 19 Feb 2026 | McKim 2007 Trust |
| John R. Welch | CLH | Common Stock | Sale | -6.83% | $204,802 | $273.07 | -750 | 10,237 | 19 Feb 2026 | Direct |
| Charles H. Geer II | CLH | Common Stock | Tax liability | -2.24% | -197 | 8,617 | 02 Feb 2026 | Direct | ||
| Jeroen Diderich | CLH | Common Stock | Tax liability | -0.76% | -105 | 13,667 | 02 Feb 2026 | Direct | ||
| Rebecca Underwood | CLH | Common Stock | Tax liability | -2.46% | -425 | 16,859 | 02 Feb 2026 | Direct | ||
| Robert W. Harrison | CLH | Common Stock | Tax liability | -3.18% | -184 | 5,601 | 02 Feb 2026 | Direct | ||
| Sharon M. Gabriel | CLH | Common Stock | Tax liability | -1.86% | -508 | 26,733 | 02 Feb 2026 | Direct | ||
| Eric J. Dugas | CLH | Common Stock | Tax liability | -2.94% | -567 | 18,721 | 02 Feb 2026 | Direct | ||
| Michael Louis Battles | CLH | Common Stock | Tax liability | -6.28% | -5,205 | 77,706 | 02 Feb 2026 | Direct | ||
| Brian P. Weber | CLH | Common Stock | Tax liability | -2.61% | -1,394 | 52,018 | 02 Feb 2026 | Direct | ||
| George L. Curtis | CLH | Common Stock | Tax liability | -0.52% | -249 | 47,415 | 02 Feb 2026 | Direct | ||
| Eric W. Gerstenberg | CLH | Common Stock | Tax liability | -9.78% | -4,934 | 45,520 | 02 Feb 2026 | Direct | ||
| Charles H. Geer II | CLH | Common Stock | Award | 27.2% | 2,346 | 10,963 | 01 Feb 2026 | Direct | ||
| Jeroen Diderich | CLH | Common Stock | Award | 30.6% | 4,188 | 17,855 | 01 Feb 2026 | Direct | ||
| Rebecca Underwood | CLH | Common Stock | Award | 19.9% | 3,351 | 20,210 | 01 Feb 2026 | Direct | ||
| Robert W. Harrison | CLH | Common Stock | Award | 25.6% | 1,433 | 7,034 | 01 Feb 2026 | Direct | ||
| Sharon M. Gabriel | CLH | Common Stock | Award | 9.87% | 2,639 | 29,372 | 01 Feb 2026 | Direct | ||
| Eric J. Dugas | CLH | Common Stock | Award | 21.8% | 4,088 | 22,809 | 01 Feb 2026 | Direct | ||
| Michael Louis Battles | CLH | Common Stock | Award | 27% | 20,980 | 98,686 | 01 Feb 2026 | Direct | ||
| Brian P. Weber | CLH | Common Stock | Award | 8.12% | 4,222 | 56,240 | 01 Feb 2026 | Direct | ||
| Eric W. Gerstenberg | CLH | Common Stock | Award | 46.1% | 20,980 | 66,500 | 01 Feb 2026 | Direct | ||
| Sharon M. Gabriel | CLH | Common Stock | Tax liability | -1.89% | -525 | 27,241 | 02 Jan 2026 | Direct | ||
| John R. Welch | CLH | Common Stock | Gift | -3.64% | -415 | 10,987 | 17 Dec 2025 | Direct | ||
| Eric W. Gerstenberg | CLH | Common Stock | Sale | -1.18% | $144,781 | $240.90 | -601 | 50,454 | 16 Dec 2025 | Direct |
| Rebecca Underwood | CLH | Common Stock | Tax liability | -0.29% | -51 | 17,284 | 15 Dec 2025 | Direct | ||
| Robert W. Harrison | CLH | Common Stock | Tax liability | -0.28% | -16 | 5,785 | 15 Dec 2025 | Direct | ||
| Charles H. Geer II | CLH | Common Stock | Tax liability | -0.32% | -28 | 8,814 | 15 Dec 2025 | Direct | ||
| George L. Curtis | CLH | Common Stock | Gift | -2.05% | -1,000 | 47,664 | 09 Dec 2025 | Direct | ||
| Robert W. Harrison | CLH | Common Stock | Tax liability | -2.06% | -122 | 5,801 | 01 Dec 2025 | Direct | ||
| Lauren States | CLH | Common Stock | Gift | -2.09% | -245 | 11,496 | 13 Nov 2025 | Direct | ||
| Charles H. Geer II | CLH | Common Stock | Tax liability | -3.22% | -294 | 8,842 | 01 Nov 2025 | Direct | ||
| Alan S. Mckim | CLH | Common Stock | Gift | -0.55% | -12,850 | 2,342,461 | 16 Sep 2025 | McKim 2007 Trust | ||
| Andrea Robertson | CLH | Common Stock | Gift | -4.35% | -430 | 9,458 | 05 Aug 2025 | Direct | ||
| Michael Louis Battles | CLH | Common Stock | Purchase | 2.47% | $467,000 | $233.50 | 2,000 | 82,911 | 01 Aug 2025 | Direct |
| Andrea Robertson | CLH | Common Stock | Sale | -7.8% | $195,323 | $233.64 | -836 | 9,888 | 31 Jul 2025 | Direct |
| Rebecca Underwood | CLH | Common Stock | Tax liability | -5.72% | -1,051 | 17,335 | 01 Jul 2025 | Direct | ||
| Michael Louis Battles | CLH | Common Stock | Tax liability | -1.86% | -1,532 | 80,911 | 01 Jul 2025 | Direct | ||
| Eric W. Gerstenberg | CLH | Common Stock | Tax liability | -1.09% | -564 | 51,055 | 01 Jul 2025 | Direct | ||
| George L. Curtis | CLH | Common Stock | Tax liability | -0.81% | -399 | 48,664 | 01 Jul 2025 | Direct | ||
| Sharon M. Gabriel | CLH | Common Stock | Tax liability | -1.86% | -525 | 27,766 | 01 Jul 2025 | Direct | ||
| Brian P. Weber | CLH | Common Stock | Tax liability | -2.08% | -1,136 | 53,412 | 01 Jul 2025 | Direct | ||
| Eric J. Dugas | CLH | Common Stock | Tax liability | -3.08% | -613 | 19,288 | 01 Jul 2025 | Direct | ||
| Alan S. Mckim | CLH | Common Stock | Tax liability | -3.79% | -1,342 | 34,027 | 01 Jul 2025 | Direct | ||
| Brian P. Weber | CLH | Common Stock | Sale | -5.27% | $689,461 | $227.17 | -3,035 | 54,548 | 13 Jun 2025 | Direct |
| Eric W. Gerstenberg | CLH | Common Stock | Sale | -13.5% | $1,818,957 | $225.23 | -8,076 | 51,619 | 06 Jun 2025 | Direct |