| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Geer Charles H. II | EVP, Industrial Services | 42 LONGWATER DRIVE, NORWELL | /s/ Charles H. Geer II | 17 Mar 2026 | 0002079092 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CLH | Common Stock | Disposed to Issuer | -139 | -1.3% | $0.000000* | 10,839 | 13 Mar 2026 | Direct | F1, F2 |
| Id | Content |
|---|---|
| F1 | Shares of restricted stock forfeited due to the Company not achieving performance targets under its Long Term Equity Incentive Program. |
| F2 | Includes 15 shares acquired under the Clean Harbors Employee Stock Purchase Plan |