| Insiders | Shares | % | Avg Price | Total $ | |
|---|---|---|---|---|---|
| Buys | 1 | +2,000 | 0.6% | $233.50 | +$467,000 |
| Sells | 10 | -330,810 | 99% | $264.94 | -$87,643,678 |
| Net | -9 | -328,810 | -99% | -$87,176,678 |
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Report Date |
|---|---|---|---|---|---|
| Alan S. Mckim | EXEC CHAIR, CTO., Director | $636,119,921 | -$79,825,950 | -11% | 13 Mar 2026 |
| Michael Louis Battles | CO-CEO, Director | $26,786,577 | +$467,000 | +1.8% | 13 Mar 2026 |
| Brian P. Weber | Evp (Chesi) | $14,296,307 | -$2,063,406 | -13% | 13 Mar 2026 |
| George L. Curtis | Exec. Vice President (Chesi) | $12,931,199 | 13 Mar 2026 | ||
| Eric W. Gerstenberg | Co Ceo | $11,198,259 | -$2,663,388 | -19% | 13 Mar 2026 |
| Sharon M. Gabriel | Evp/Cio (Chesi) | $5,915,473 | -$998,528 | -14% | 13 Mar 2026 |
| Rebecca Underwood | President & Evp Facilities | $5,246,840 | 13 Mar 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 | ||
| Jeroen Diderich | EVP&President of Sales&Service | $4,186,640 | 01 Feb 2026 | ||
| Eric J. Dugas | Evp Chief Financial Officer | $3,925,582 | -$784,292 | -17% | 13 Mar 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 | ||
| Charles H. Geer II | EVP, Industrial Services | $3,043,807 | 13 Mar 2026 | ||
| 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 |
| Andrea Robertson | Director | $2,219,887 | -$195,323 | -8.1% | 05 Aug 2025 |
| Robert W. Harrison | Evp, Ehs | $1,866,891 | 13 Mar 2026 | ||
| Robert Willett | Director | $1,819,506 | 21 May 2025 | ||
| Melkeya McDuffie | Evp, Human Resources Officer | $1,800,467 | 24 May 2023 | ||
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Brian P. Weber | CLH | Common Stock | Sale | -8.77% | $1,373,945 | $293.39 | -4,683 | 48,728 | 17 Mar 2026 | Direct |
| Brian P. Weber | CLH | Common Stock | Disposed to Issuer | -3.38% | -1,869 | 53,411 | 13 Mar 2026 | Direct | ||
| Brian P. Weber | CLH | Common Stock | Tax liability | -1.71% | -960 | 55,280 | 13 Mar 2026 | Direct | ||
| Rebecca Underwood | CLH | Common Stock | Disposed to Issuer | -6.98% | -1,401 | 18,684 | 13 Mar 2026 | Direct | ||
| Rebecca Underwood | CLH | Common Stock | Tax liability | -0.62% | -125 | 20,085 | 13 Mar 2026 | Direct | ||
| Sharon M. Gabriel | CLH | Common Stock | Disposed to Issuer | -6.24% | -1,401 | 21,065 | 13 Mar 2026 | Direct | ||
| Sharon M. Gabriel | CLH | Common Stock | Tax liability | -3.13% | -727 | 22,466 | 13 Mar 2026 | Direct | ||
| Eric W. Gerstenberg | CLH | Common Stock | Disposed to Issuer | -5.15% | -2,166 | 39,877 | 13 Mar 2026 | Direct | ||
| Eric W. Gerstenberg | CLH | Common Stock | Tax liability | -2.27% | -977 | 42,043 | 13 Mar 2026 | Direct | ||
| Robert W. Harrison | CLH | Common Stock | Disposed to Issuer | -5.25% | -368 | 6,648 | 13 Mar 2026 | Direct | ||
| Robert W. Harrison | CLH | Common Stock | Tax liability | -0.26% | -18 | 7,016 | 13 Mar 2026 | Direct | ||
| Charles H. Geer II | CLH | Common Stock | Disposed to Issuer | -1.27% | -139 | 10,839 | 13 Mar 2026 | Direct | ||
| Eric J. Dugas | CLH | Common Stock | Disposed to Issuer | -8.65% | -1,324 | 13,979 | 13 Mar 2026 | Direct | ||
| Eric J. Dugas | CLH | Common Stock | Tax liability | -3.95% | -630 | 15,303 | 13 Mar 2026 | Direct | ||
| George L. Curtis | CLH | Common Stock | Disposed to Issuer | -2.18% | -1,028 | 46,048 | 13 Mar 2026 | Direct | ||
| George L. Curtis | CLH | Common Stock | Tax liability | -0.74% | -350 | 47,065 | 13 Mar 2026 | Direct | ||
| Alan S. Mckim | CLH | Common Stock | Tax liability | -3.72% | -1,265 | 32,762 | 13 Mar 2026 | Direct | ||
| Michael Louis Battles | CLH | Common Stock | Disposed to Issuer | -2.22% | -2,166 | 95,387 | 13 Mar 2026 | Direct | ||
| Michael Louis Battles | CLH | Common Stock | Tax liability | -1.16% | -1,148 | 97,538 | 13 Mar 2026 | Direct | ||
| 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 |