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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000950170-24-021787
Filing Date
2024-02-28
Accepted
2024-02-28 12:09:22
Documents
127
Period of Report
2023-12-31

Document Format Files

Seq Description Document Type Size
1 10-K kop-20231231.htm   iXBRL 10-K 4011078
2 EX-10.43 kop-ex10_43.htm EX-10.43 122236
3 EX-10.44 kop-ex10_44.htm EX-10.44 152647
4 EX-10.45 kop-ex10_45.htm EX-10.45 150668
5 EX-10.46 kop-ex10_46.htm EX-10.46 122894
6 EX-21 kop-ex21.htm EX-21 56754
7 EX-23.1 kop-ex23_1.htm EX-23.1 3521
8 EX-24 kop-ex24.htm EX-24 85055
9 EX-31.1 kop-ex31_1.htm EX-31.1 12249
10 EX-31.2 kop-ex31_2.htm EX-31.2 12369
11 EX-32.1 kop-ex32_1.htm EX-32.1 14447
12 EX-97 kop-ex97.htm EX-97 50556
  Complete submission text file 0000950170-24-021787.txt   19926406

Data Files

Seq Description Document Type Size
13 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT kop-20231231.xsd EX-101.SCH 2330364
129 EXTRACTED XBRL INSTANCE DOCUMENT kop-20231231_htm.xml XML 4490431
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)

IRS No.: 201878963 | State of Incorp.: PA | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-32737 | Film No.: 24692393
SIC: 2400 Lumber & Wood Products (No Furniture)
(CF Office: 04 Manufacturing)