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Filing Detail
Form 8-K - Current report:
SEC Accession No. 0000950170-23-038090
Filing Date
2023-08-03
Accepted
2023-08-03 16:34:03
Documents
14
Period of Report
2023-08-02
Items
Item 5.03: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K kop-20230802.htm   iXBRL 8-K 55789
2 EX-3.1 kop-ex3_1.htm EX-3.1 14312
3 EX-3.2 kop-ex3_2.htm EX-3.2 279518
  Complete submission text file 0000950170-23-038090.txt   510637

Data Files

Seq Description Document Type Size
4 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT kop-20230802_pre.xml EX-101.PRE 10284
5 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT kop-20230802_lab.xml EX-101.LAB 14019
6 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT kop-20230802.xsd EX-101.SCH 2463
8 EXTRACTED XBRL INSTANCE DOCUMENT kop-20230802_htm.xml XML 4899
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: 8-K | Act: 34 | File No.: 001-32737 | Film No.: 231140664
SIC: 2400 Lumber & Wood Products (No Furniture)