Through the 90-day period concluding January 14, 2026, Clean Harbors's top three insider stakeholders include Exec Chair And Cto. Alan S Mckim (2.38Mn shares), Co Ceo Michael Louis Battles (82.91K shares), Evp (Chesi) Brian P Weber (53.41K shares).
| Holder | Position | Shares | Report Date |
|---|---|---|---|
| Alan S Mckim | Exec Chair And Cto. | 2,376,488 | 03 Jul, 2025 |
| Michael Louis Battles | Co Ceo | 82,911 | 04 Aug, 2025 |
| Brian P Weber | Evp (Chesi) | 53,412 | 03 Jul, 2025 |
| Eric W Gerstenberg | Co Ceo | 50,454 | 17 Dec, 2025 |
| George L Curtis | Exec. Vice President (Chesi) | 47,664 | 11 Dec, 2025 |
| Michael J Twohig | Evp (Chesi) | 28,857 | 29 Mar, 2023 |
| Thomas J Shields | 28,762 | 26 May, 2022 | |
| Sharon M. Gabriel | Evp/Cio (Chesi) | 27,241 | 05 Jan, 2026 |
| Edward G Galante | 24,809 | 23 May, 2025 | |
| Eric J. Dugas | Evp Chief Financial Officer | 19,288 | 03 Jul, 2025 |
| Rebecca Underwood | President & Evp Facilities | 17,284 | 17 Dec, 2025 |
| Robert Speights | President And Industrial Services | 16,310 | 28 May, 2025 |
| Rod Marlin | 14,427 | 12 May, 2021 | |
| Jeroen Diderich | Evp&President Of Sales&Service | 13,772 | 03 Jun, 2025 |
| Lauren States | 11,496 | 14 Nov, 2025 | |
| John R. Welch | 10,987 | 29 Dec, 2025 | |
| Melkeya Mcduffie | Evp And Human Resources Officer | 10,094 | 26 May, 2023 |
| Andrea Robertson | 9,458 | 06 Aug, 2025 | |
| Robert Willett | 9,376 | 23 May, 2025 | |
| Charles H. Ii Geer | Evp And Industrial Services | 8,814 | 17 Dec, 2025 |
| John T Preston | 6,392 | 23 May, 2025 | |
| Marcy L. Reed | 5,917 | 23 May, 2025 | |
| Robert W. Harrison | Evp And Ehs | 5,785 | 17 Dec, 2025 |
| Eugene G Banucci | 5,598 | 12 Jun, 2023 | |
| Jeffrey Herbert Knapp | Evp Hr (Chesi) | 5,311 | 24 Nov, 2021 |
| Shelley Jr Stewart | 3,871 | 23 May, 2025 | |
| Karyn Polito | 3,015 | 23 May, 2025 | |
| Alison A. Quirk | 2,978 | 06 Jun, 2025 |
* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.
| Transaction Date | Insider Name | Security Class | Transaction Type | Shares Traded | Price | Shares Remaining | Ownership | Code |
|---|---|---|---|---|---|---|---|---|
| 02 Jan, 2026 | Sharon M. Gabriel | Common Stock | D | 525 | $234.48 | 27,241 | D | F |
| 17 Dec, 2025 | John R. Welch | - | - | 10,987 | D | |||
| 17 Dec, 2025 | John R. Welch | Common Stock | D | 415 | $0.00 | 10,987 | D | G |
| 16 Dec, 2025 | Eric W Gerstenberg | - | - | 50,454 | D | |||
| 16 Dec, 2025 | Eric W Gerstenberg | Common Stock | D | 601 | $240.90 | 50,454 | D | S |
| 15 Dec, 2025 | Robert W. Harrison | Common Stock | D | 16 | $240.71 | 5,785 | D | F |
| 15 Dec, 2025 | Rebecca Underwood | Common Stock | D | 51 | $240.71 | 17,284 | D | F |
| 15 Dec, 2025 | Rebecca Underwood | - | - | 17,284 | D | |||
| 15 Dec, 2025 | Charles H. Ii Geer | Common Stock | D | 28 | $240.71 | 8,814 | D | F |
| 09 Dec, 2025 | George L Curtis | - | - | 47,664 | D | |||
| 09 Dec, 2025 | George L Curtis | Common Stock | D | 1,000 | $0.00 | 47,664 | D | G |
| 01 Dec, 2025 | Robert W. Harrison | - | - | 5,801 | D | |||
| 01 Dec, 2025 | Robert W. Harrison | Common Stock | D | 122 | $228.54 | 5,801 | D | F |
| 13 Nov, 2025 | Lauren States | - | - | 11,496 | D | |||
| 13 Nov, 2025 | Lauren States | Common Stock | D | 245 | $0.00 | 11,496 | D | G |
| 01 Nov, 2025 | Charles H. Ii Geer | Common Stock | D | 294 | $210.51 | 8,842 | D | F |
| 01 Nov, 2025 | Charles H. Ii Geer | - | - | 8,842 | D | |||
| 16 Sep, 2025 | Alan S Mckim | Common Stock | D | 8,567 | $0.00 | 2,346,744 | I | G |
| 16 Sep, 2025 | Alan S Mckim | - | - | 2,342,461 | I | |||
| 16 Sep, 2025 | Alan S Mckim | Common Stock | D | 4,283 | $0.00 | 2,342,461 | I | G |