Item 5.02

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On December 12, 2023, Jonny Ginns notified Ecovyst Inc. (the "Company") that he would be resigning from the Company's Board of Directors (the "Board"), effective December 31, 2023. Mr. Ginns has served on the Board since 2010. The resignation of Mr. Ginns was not as a result of or caused by any disagreement with the Company. The Board has decreased the size of the Board to eight (8) members effective upon Mr. Ginns's departure.

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Ecovyst Inc. published this content on 18 December 2023 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 18 December 2023 11:24:49 UTC.