Type	Name	Date
Severance agreement	Severance Agreement, between Ecovyst Catalyst Technologies LLC and Kurt J. Bitting	12/22/2022
Severance agreement	Severance Agreement, between Ecovyst Catalyst Technologies LLC and Michael Feehan	12/22/2022
Severance agreement	Severance Agreement, between PQ Corporation and Belgacem Chariag	08/09/2018