Updated Jul 16, 2026 · Last SEC filing 2026-07-06
CLEAN HARBORS INC (CLH) has filed 22 SEC Form 4 insider transactions in the last 90 days, with the most recent on 2026-07-06. 4 Form 8-K material event filings were reported by CLH in the last 90 days. 1 Form 144 notices of proposed sale were filed for CLH stock. InsiderAlpha tracks every CLH SEC filing — Form 4, Form 144, and 8-K — in real time, including Rule 10b5-1 plan detection.
| SIC classification | Hazardous Waste Management (SIC 4955) |
|---|---|
| SEC CIK | 0000822818 |
| Form 4 filings (90d) | 22 |
|---|---|
| Form 8-K filings (90d) | 4 |
| Form 144 notices (90d) | 1 |
| Latest Form 4 filing | 2026-07-06 |
| Date | Insider | Role | Transaction | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|
| Underwood Rebecca | PRESIDENT & EVP FACILITIES | F — Tax withholding / forfeiture | 311 | $290.74 | $90K | SEC | |
| GERSTENBERG ERIC W | CO-CEO | F — Tax withholding / forfeiture | 564 | $290.74 | $164K | SEC | |
| MCKIM ALAN S | EXEC CHAIR, CTO. | F — Tax withholding / forfeiture | 1.3K | $290.74 | $390K | SEC | |
| Gabriel Sharon M. | EVP/CIO (CHESI) | F — Tax withholding / forfeiture | 359 | $290.74 | $104K | SEC | |
| Dugas Eric J. | EVP CHIEF FINANCIAL OFFICER | F — Tax withholding / forfeiture | 447 | $290.74 | $130K | SEC | |
| Geer Charles H. II | EVP, Industrial Services | F — Tax withholding / forfeiture | 40 | $290.74 | $12K | SEC | |
| Weber Brian P | EVP (CHESI) | F — Tax withholding / forfeiture | 814 | $290.74 | $237K | SEC | |
| Diderich Jeroen | EVP&President of Sales&Service | F — Tax withholding / forfeiture | 1.7K | $281.00 | $482K | SEC | |
| States Lauren | Insider | S — Open-market sale | 789 | $286.19 | $226K | SEC | |
| Willett Robert | Insider | A — Grant or award | 652 | $0.00 | — | SEC | |
| Polito Karyn | Insider | A — Grant or award | 652 | $0.00 | — | SEC | |
| GALANTE EDWARD G | Insider | A — Grant or award | 652 | $0.00 | — | SEC | |
| Reed Marcy L. | Insider | A — Grant or award | 652 | $0.00 | — | SEC | |
| Quirk Alison A. | Insider | A — Grant or award | 652 | $0.00 | — | SEC | |
| Robertson Andrea | Insider | A — Grant or award | 652 | $0.00 | — | SEC |
All transactions sourced from SEC EDGAR Form 4 filings for CLEAN HARBORS INC (CLH). Updated in real time as new filings are submitted to the SEC.
| Insider | Form 4 filings | Total transaction value |
|---|---|---|
| Polito Karyn | 3 | $272K |
| States Lauren | 2 | $226K |
| Robertson Andrea | 2 | — |
| GERSTENBERG ERIC W | 1 | $164K |
| Weber Brian P | 1 | $237K |
Form 144 must be filed before insiders sell restricted or control stock above SEC thresholds. A cluster of Form 144 notices often precedes a wave of insider distribution.
SEC Form 4 transactions are reported with a one-letter code indicating the type of transaction. Common codes you'll see in CLH insider filings:
| P | Open-market purchase by the insider |
|---|---|
| S | Open-market sale by the insider |
| A | Grant, award, or other acquisition from the issuer |
| M | Exercise or conversion of derivative security (e.g. options) |
| F | Payment of exercise price or tax liability via share withholding |
| G | Bona-fide gift of securities |
| D | Disposition to the issuer (e.g. share buyback participation) |
| J | Other acquisition or disposition |
| X | Exercise of in-the-money or at-the-money derivative security |
| C | Conversion of derivative security |
| V | Transaction voluntarily reported earlier than required |
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