| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| Bitting Kurt | Director and Chief Executive Officer, Director | C/O ECOVYST INC., 600 LEE ROAD, SUITE 200, WAYNE | /s/ Joseph S. Koscinski, as attorney-in-fact for Kurt Bitting | 05 Feb 2026 | 0001769761 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | ECVT | Common Stock | Tax liability | $267,287 | -25,925 | -4.5% | $10.31 | 543,926 | 03 Feb 2026 | Direct | |
| transaction | ECVT | Common Stock | Award | $0 | +116,392 | +21% | $0.000000 | 660,318 | 03 Feb 2026 | Direct |
Director and Chief Executive Officer