| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| GERSTENBERG ERIC W | CO-CEO | C/O CLEAN HARBORS ENVIRON. SERVICES INC., 42 LONGWATER DRIVE, NORWELL | /s/ Eric W. Gerstenberg | 03 Jul 2025 | 0001211558 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CLH | Common Stock | Tax liability | $129,466 | -564 | -1.1% | $229.55 | 51,055 | 01 Jul 2025 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3. |