| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Weber Brian P | EVP (CHESI) | 27 INDEPENDENCE DRIVE, WALPOLE | /s/ Brian P. Weber | 17 Mar 2026 | 0001322710 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | CLH | Common Stock | Tax liability | -960 | -1.7% | $288.93* | 55,280 | 13 Mar 2026 | Direct | F1 | |
| transaction | CLH | Common Stock | Disposed to Issuer | -1,869 | -3.4% | $0.000000* | 53,411 | 13 Mar 2026 | Direct | F2 | |
| transaction | CLH | Common Stock | Sale | $1,373,945 | -4,683 | -8.8% | $293.39 | 48,728 | 17 Mar 2026 | Direct |
| Id | Content |
|---|---|
| F1 | Payment of tax liability by withholding of securities incident to vesting of securities in accordance with Rule 16b3. |
| F2 | Shares of restricted stock forfeited due to the Company not achieving performance targets under its Long Term Equity Incentive Program. |