0000899243-23-016900.txt : 20230705 0000899243-23-016900.hdr.sgml : 20230705 20230705163029 ACCESSION NUMBER: 0000899243-23-016900 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230701 FILED AS OF DATE: 20230705 DATE AS OF CHANGE: 20230705 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Koscinski Joseph S. CENTRAL INDEX KEY: 0001717992 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38221 FILM NUMBER: 231069599 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 doc4.xml FORM 4 SUBMISSION X0407 4 2023-07-01 0 0001708035 Ecovyst Inc. ECVT 0001717992 Koscinski Joseph S. C/O ECOVYST INC. 300 LINDENWOOD DRIVE MALVERN PA 19355 0 1 0 0 See Remarks 0 Common Stock 2023-07-01 4 F 0 52830 11.37 D 494399 D Vice President, Chief Administrative Officer, General Counsel and Secretary /s/ Joseph S. Koscinski 2023-07-05