Koscinski Joseph S.
Related Filers (1)
Ownership (19)
4
Wednesday, 1/24/2024
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 7/5/2023
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 3/9/2023
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/18/2023
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 11/18/2022
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 8/8/2022
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 5/16/2022
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 3/3/2022
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/19/2022
Ecovyst Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/20/2021
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 1/22/2020
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 1/7/2020
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Monday, 11/4/2019
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Friday, 10/4/2019
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 3/13/2019
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Thursday, 10/4/2018
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Tuesday, 7/3/2018
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
4
Wednesday, 10/4/2017
PQ Group Holdings Inc.: Statement of changes in beneficial ownership of securities
3
Friday, 9/29/2017
PQ Group Holdings Inc.: Initial statement of beneficial ownership of securities