0000950170-25-068045.txt : 20250509 0000950170-25-068045.hdr.sgml : 20250509 20250509161621 ACCESSION NUMBER: 0000950170-25-068045 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20250508 FILED AS OF DATE: 20250509 DATE AS OF CHANGE: 20250509 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: NEUPAVER ALBERT J CENTRAL INDEX KEY: 0001190210 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-32737 FILM NUMBER: 25930649 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 EIN: 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 2025-05-08 0001315257 Koppers Holdings Inc. KOP 0001190210 NEUPAVER ALBERT J 436 SEVENTH AVENUE PITTSBURGH PA 15219 true false false false false Common Stock 2025-05-08 4 A false 4778 0 A 83784 D The reporting person was awarded time-based restricted stock units. /s/Stephanie L. Apostolou, Attorney in Fact 2025-05-09