Form 8-K - Current report:
SEC Accession No. 0000950170-25-078597
Filing Date
2025-05-29
Accepted
2025-05-29 08:00:48
Documents
12
Period of Report
2025-05-22
Items
Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K kop-20250522.htm   iXBRL 8-K 46642
2 EX-99.1 kop-ex99_1.htm EX-99.1 23761
3 GRAPHIC img180885081_0.jpg GRAPHIC 16346
  Complete submission text file 0000950170-25-078597.txt   204938

Data Files

Seq Description Document Type Size
4 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT kop-20250522.xsd EX-101.SCH 25026
14 EXTRACTED XBRL INSTANCE DOCUMENT kop-20250522_htm.xml XML 4718
Mailing Address 436 SEVENTH AVENUE PITTSBURGH PA 15219
Business Address 436 SEVENTH AVENUE PITTSBURGH PA 15219 412-227-2001
Koppers Holdings Inc. (Filer) CIK: 0001315257 (see all company filings)

EIN.: 201878963 | State of Incorp.: PA | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-32737 | Film No.: 25997758
SIC: 2400 Lumber & Wood Products (No Furniture)
(CF Office: 04 Manufacturing)