OpenFilings

Koppers Holdings Inc.

Form10-K

Report Period2025-12-31

Date Filed2026-02-26

Time Filed12:17:41

Document Analysis

Natural Language Processing

Recognized Type Unidentified

Defined Term Format

Exhibits

10-K
EX-10.45
EX-10.46
EX-10.47
EX-10.48
EX-10.49
EX-10.50
EX-10.51
EX-19
EX-21
EX-23.1
EX-24
EX-31.1
EX-31.2
EX-32.1
Filing on SEC Edgar