0000950170-23-007095.txt : 20230309 0000950170-23-007095.hdr.sgml : 20230309 20230309180418 ACCESSION NUMBER: 0000950170-23-007095 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230307 FILED AS OF DATE: 20230309 DATE AS OF CHANGE: 20230309 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Coxon Robert CENTRAL INDEX KEY: 0001717991 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38221 FILM NUMBER: 23720985 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 X0306 4 2023-03-07 0001708035 Ecovyst Inc. ECVT 0001717991 Coxon Robert C/O ECOVYST INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 true false false false Common Stock 2023-03-07 4 D false 25476 0.00 D 200919 D /s/ Joseph Koscinski, as attorney-in fact for Robert Coxon 2023-03-09