0000950170-23-044484.txt : 20230825 0000950170-23-044484.hdr.sgml : 20230825 20230825073031 ACCESSION NUMBER: 0000950170-23-044484 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230823 FILED AS OF DATE: 20230825 DATE AS OF CHANGE: 20230825 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Feehan Michael CENTRAL INDEX KEY: 0001874994 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38221 FILM NUMBER: 231203790 MAIL ADDRESS: STREET 1: C/O PQ GROUP HOLDINGS INC. STREET 2: 300 LINDENWOOD DRIVE CITY: MALVERN STATE: PA ZIP: 19355 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Ecovyst Inc. CENTRAL INDEX KEY: 0001708035 STANDARD INDUSTRIAL CLASSIFICATION: CHEMICALS & ALLIED PRODUCTS [2800] IRS NUMBER: 813406833 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 300 LINDENWOOD DRIVE CITY: MALVERN STATE: PA ZIP: 19355 BUSINESS PHONE: 484-617-1200 MAIL ADDRESS: STREET 1: 300 LINDENWOOD DRIVE CITY: MALVERN STATE: PA ZIP: 19355 FORMER COMPANY: FORMER CONFORMED NAME: PQ Group Holdings Inc. DATE OF NAME CHANGE: 20170531 4 1 ownership.xml 4 X0508 4 2023-08-23 0001708035 Ecovyst Inc. ECVT 0001874994 Feehan Michael C/O ECOVYST INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 false true false false See Remarks false Common Stock 2023-08-23 4 P false 5000 9.67 A 340940 D Vice President and Chief Financial Officer /s/ Joseph S. Koscinski, as attorney-in-fact for Michael Feehan 2023-08-25