SEC Filings

Search SEC EDGAR filings by company ticker and form type

Koppers Holdings Inc.

144 54 filings

All 144 Filings

Complete history of 144 filings with the SEC

Date Filed	View on EDGAR
02 Mar Mar 02, 2026	open_in_new View Filing
15 Aug Aug 15, 2025	open_in_new View Filing
11 Aug Aug 11, 2025	open_in_new View Filing
19 Mar Mar 19, 2025	open_in_new View Filing
22 Nov Nov 22, 2024	open_in_new View Filing
19 Nov Nov 19, 2024	open_in_new View Filing
15 Nov Nov 15, 2024	open_in_new View Filing
14 Nov Nov 14, 2024	open_in_new View Filing
13 Nov Nov 13, 2024	open_in_new View Filing
12 Nov Nov 12, 2024	open_in_new View Filing
12 Nov Nov 12, 2024	open_in_new View Filing
29 Aug Aug 29, 2024	open_in_new View Filing
27 Aug Aug 27, 2024	open_in_new View Filing
19 Aug Aug 19, 2024	open_in_new View Filing
07 Jun Jun 07, 2024	open_in_new View Filing
06 Jun Jun 06, 2024	open_in_new View Filing
28 May May 28, 2024	open_in_new View Filing
24 May May 24, 2024	open_in_new View Filing
17 May May 17, 2024	open_in_new View Filing
21 Mar Mar 21, 2024	open_in_new View Filing
06 Mar Mar 06, 2024	open_in_new View Filing
06 Mar Mar 06, 2024	open_in_new View Filing
06 Mar Mar 06, 2024	open_in_new View Filing
05 Mar Mar 05, 2024	open_in_new View Filing
05 Mar Mar 05, 2024	open_in_new View Filing
05 Mar Mar 05, 2024	open_in_new View Filing
04 Mar Mar 04, 2024	open_in_new View Filing
04 Mar Mar 04, 2024	open_in_new View Filing
04 Mar Mar 04, 2024	open_in_new View Filing
01 Mar Mar 01, 2024	open_in_new View Filing
01 Mar Mar 01, 2024	open_in_new View Filing
01 Mar Mar 01, 2024	open_in_new View Filing
20 Dec Dec 20, 2023	open_in_new View Filing
20 Dec Dec 20, 2023	open_in_new View Filing
14 Dec Dec 14, 2023	open_in_new View Filing
14 Dec Dec 14, 2023	open_in_new View Filing
13 Dec Dec 13, 2023	open_in_new View Filing
12 Dec Dec 12, 2023	open_in_new View Filing
11 Dec Dec 11, 2023	open_in_new View Filing
08 Dec Dec 08, 2023	open_in_new View Filing
07 Dec Dec 07, 2023	open_in_new View Filing
06 Dec Dec 06, 2023	open_in_new View Filing
05 Dec Dec 05, 2023	open_in_new View Filing
01 Dec Dec 01, 2023	open_in_new View Filing
30 Nov Nov 30, 2023	open_in_new View Filing
29 Nov Nov 29, 2023	open_in_new View Filing
17 Nov Nov 17, 2023	open_in_new View Filing
15 Nov Nov 15, 2023	open_in_new View Filing
14 Nov Nov 14, 2023	open_in_new View Filing
18 Sep Sep 18, 2023	open_in_new View Filing
01 Sep Sep 01, 2023	open_in_new View Filing
07 Aug Aug 07, 2023	open_in_new View Filing
01 Aug Aug 01, 2023	open_in_new View Filing
06 Jun Jun 06, 2023	open_in_new View Filing