0000950170-24-053678.txt : 20240506 0000950170-24-053678.hdr.sgml : 20240506 20240506170745 ACCESSION NUMBER: 0000950170-24-053678 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20240502 FILED AS OF DATE: 20240506 DATE AS OF CHANGE: 20240506 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Vartanian Nishan J. CENTRAL INDEX KEY: 0001564614 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-32737 FILM NUMBER: 24918516 MAIL ADDRESS: STREET 1: 1000 CRANBERRY WOODS DRIVE CITY: CRANBERRY TOWNSHIP STATE: PA ZIP: 16066 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Koppers Holdings Inc. CENTRAL INDEX KEY: 0001315257 STANDARD INDUSTRIAL CLASSIFICATION: LUMBER & WOOD PRODUCTS (NO FURNITURE) [2400] ORGANIZATION NAME: 04 Manufacturing IRS NUMBER: 201878963 STATE OF INCORPORATION: PA FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 436 SEVENTH AVENUE CITY: PITTSBURGH STATE: PA ZIP: 15219 BUSINESS PHONE: 412-227-2001 MAIL ADDRESS: STREET 1: 436 SEVENTH AVENUE CITY: PITTSBURGH STATE: PA ZIP: 15219 FORMER COMPANY: FORMER CONFORMED NAME: KI Holdings Inc. DATE OF NAME CHANGE: 20050124 4 1 ownership.xml 4 X0508 4 2024-05-02 0001315257 Koppers Holdings Inc. KOP 0001564614 Vartanian Nishan J. 436 SEVENTH AVENUE PITTSBURGH PA 15219 true false false false false Common Stock 2024-05-02 4 A false 2079 0 A 2539 D The reporting person was awarded time-based restricted stock units ("RSUs"). /s/Stephanie L. Apostolou, Attorney in Fact 2024-05-06