SEC Filings
Search SEC EDGAR filings by company ticker and form type
arrow_back
Koppers Holdings Inc.
8-K/A
9 filings
All 8-K/A Filings
Complete history of 8-K/A filings with the SEC
| Date Filed | View on EDGAR |
|---|---|
|
07
May
May 07, 2026
|
open_in_new View Filing |
|
18
Mar
Mar 18, 2026
|
open_in_new View Filing |
|
03
Dec
Dec 03, 2025
|
open_in_new View Filing |
|
02
May
May 02, 2024
|
open_in_new View Filing |
|
04
May
May 04, 2023
|
open_in_new View Filing |
|
25
Jun
Jun 25, 2018
|
open_in_new View Filing |
|
03
Aug
Aug 03, 2017
|
open_in_new View Filing |
|
30
Oct
Oct 30, 2014
|
open_in_new View Filing |
|
05
Aug
Aug 05, 2011
|
open_in_new View Filing |