| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Quirk Alison A. | Director | C/O CLEAN HARBORS, INC., 42 LONGWATER DRIVE, NORWELL | /s/ Alison A. Quirk | 06 Jun 2025 | 0001485499 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CLH | Common Stock | Sale | $199,755 | -893 | -23% | $223.69 | 2,978 | 05 Jun 2025 | Direct |