Althoff Donald L. (CIK 2023079) reported 1 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-02-05). Recent activity: Buy ECVT (19,399 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-05 | Ecovyst Inc. (ECVT) | Director | Buy | 19,399 | $0 |
Source: SEC Form 4 filings · as of 2026-02-05