| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MCKIM ALAN S | EXEC CHAIR, CTO., Director | C/O CLEAN HARBORS, INC., 42 LONGWATER DRIVE, NORWELL | /s/ C. Michael Malm, Attorney-in-Fact | 17 Sep 2025 | 0001024547 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CLH | Common Stock | Gift | $0 | -8,567 | -0.36% | $0.000000 | 2,346,744 | 16 Sep 2025 | McKim 2007 Trust | |
| transaction | CLH | Common Stock | Gift | $0 | -4,283 | -0.18% | $0.000000 | 2,342,461 | 16 Sep 2025 | McKim 2007 Trust | |
| holding | CLH | Common Stock | 34,027 | 16 Sep 2025 | Direct | ||||||
| holding | CLH | Common Stock | 100,000 | 16 Sep 2025 | McKim 2025 Annuity Trust |