Clean Harbors (NYSE: CLH) insider transactions
In the twelve months to 10 November 2026, executives and directors of Clean Harbors reported 13 open-market sales of 220,776 shares ($63.4m) and 1 open-market purchase of 125 shares ($39,354), by 10 people, according to the Form 4 filings they submitted to the SEC.
Latest transactions
| Date | Insider | Role | Transaction | Shares | Price | Held after | Filing |
|---|---|---|---|---|---|---|---|
| 9 November 2026 | Reed Marcy L. | Director | Gift | −350 | — | 5,383 | Form 4 |
| 2 November 2026 | Geer Charles H. II | EVP, Industrial Services | Shares withheld for tax | −294 | $302.12 | 10,505 | Form 4 |
| 29 October 2026 | Polito Karyn | Director | Open-market purchase | +125 | $314.83 | 4,252 | Form 4 |
| 14 August 2026 | Gerstenberg Eric W | Co-ceo | Open-market sale | −2,500 | $321.34 | 56,793 | Form 4 |
| 3 August 2026 | Robertson Andrea | Director | Open-market sale | −789 | $314.01 | 8,979 | Form 4 |
| 17 July 2026 | McKim Alan S | Exec Chair, CTO. | Shares withheld for tax | −1,265 | $310.58 | 30,154 | Form 4 |
| 1 July 2026 | Battles Michael Louis | Co-ceo | Shares withheld for tax | −1,032 | $290.74 | 94,355 | Form 4 |
| 1 July 2026 | Curtis George L | Exec. Vice President (chesi) | Shares withheld for tax | −1,757 | $290.74 | 44,291 | Form 4 |
| 1 July 2026 | McKim Alan S | Exec Chair, CTO. | Shares withheld for tax | −1,343 | $290.74 | 31,419 | Form 4 |
| 1 July 2026 | Gerstenberg Eric W | Co-ceo | Shares withheld for tax | −564 | $290.74 | 38,313 | Form 4 |
| 1 July 2026 | Weber Brian P | EVP (chesi) | Shares withheld for tax | −814 | $290.74 | 47,914 | Form 4 |
| 1 July 2026 | Dugas Eric J. | EVP Chief Financial Officer | Shares withheld for tax | −447 | $290.74 | 13,532 | Form 4 |
| 1 July 2026 | Gabriel Sharon M. | Evp/cio (chesi) | Shares withheld for tax | −359 | $290.74 | 20,706 | Form 4 |
| 1 July 2026 | Underwood Rebecca | President & EVP Facilities | Shares withheld for tax | −311 | $290.74 | 18,373 | Form 4 |
| 1 July 2026 | Geer Charles H. II | EVP, Industrial Services | Shares withheld for tax | −40 | $290.74 | 10,799 | Form 4 |
| 1 June 2026 | Diderich Jeroen | EVP&President of Sales&Service | Shares withheld for tax | −1,717 | $281.00 | 16,152 | Form 4 |
| 26 May 2026 | States Lauren | Director | Open-market sale | −789 | $286.19 | 11,359 | Form 4 |
| 20 May 2026 | Preston John T | Director | Grant or award | +652 | — | 7,044 | Form 4 |
| 20 May 2026 | Galante Edward G | Director | Grant or award | +652 | — | 25,461 | Form 4 |
| 20 May 2026 | Robertson Andrea | Director | Grant or award | +652 | — | 9,768 | Form 4 |
Names appear as in the filing, surname first. A dash in the price column means the filing reports none, as in grants and gifts.
How to read the table
Only open-market purchases and sales are trades the insider chose to make at the market price, and they are the ones counted in the summary above. Grants, option exercises and shares withheld for tax come from pay plans. A sale marked as a 10b5-1 plan was scheduled in advance under a written plan.
Where each row comes from
From the Form 4 that each executive, director or large shareholder must file with the SEC within two business days of a transaction, read up to 10 November 2026. Each row links to its filing on EDGAR. Only transactions in shares are listed, not derivatives, and amended filings are left out. The accounts of the company are on the Clean Harbors page; the method, in data sources.
Information prepared from the Form 4 filings submitted to the SEC, for information purposes only. It is not financial advice or a recommendation to buy or sell. Updated on 12 November 2026.