Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000950170-25-067733
Filing Date
2025-05-09
Accepted
2025-05-09 12:21:36
Documents
81
Period of Report
2025-03-31

Document Format Files

Seq Description Document Type Size
1 10-Q kop-20250331.htm   iXBRL 10-Q 2176415
2 EX-10.1 kop-ex10_1.htm EX-10.1 71237
3 EX-31.1 kop-ex31_1.htm EX-31.1 15490
4 EX-31.2 kop-ex31_2.htm EX-31.2 15197
5 EX-32.1 kop-ex32_1.htm EX-32.1 10992
6 GRAPHIC img67913027_0.jpg GRAPHIC 126572
  Complete submission text file 0000950170-25-067733.txt   11578290

Data Files

Seq Description Document Type Size
7 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT kop-20250331.xsd EX-101.SCH 1508610
84 EXTRACTED XBRL INSTANCE DOCUMENT kop-20250331_htm.xml XML 2402790
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: 10-Q | Act: 34 | File No.: 001-32737 | Film No.: 25929201
SIC: 2400 Lumber & Wood Products (No Furniture)
(CF Office: 04 Manufacturing)