| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Bradley David A. | Director | C/O ECOVYST INC., 600 LEE ROAD, SUITE 200, WAYNE | /s/ Joseph S. Koscinski, as attorney-in-fact for David A. Bradley | 05 Feb 2026 | 0001478505 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ECVT | Common Stock | Award | $0 | +19,399 | +22% | $0.000000 | 107,999 | 03 Feb 2026 | Direct | |
| holding | ECVT | Common Stock | 20,000 | 03 Feb 2026 | DTRJ Bradley Capital, LP |