Koppers Holdings Inc. (KOP)

CIK 1315257 · operating company. SEC filings, financial statements, 10-K sections, 8-K items and insider trades for Koppers Holdings Inc..

Recent SEC filings

FiledFormAccession number
Sep 1, 202640001229771-26-000020
Aug 20, 202640001229771-26-000018
Aug 13, 202640001919175-26-000008
Aug 12, 202640001450800-26-000006
Aug 12, 20261440001959173-26-005936
Aug 11, 202640001776180-26-000008
Aug 11, 20261440001959173-26-005881
Aug 11, 202640001315257-26-000050
Aug 10, 20261440001959173-26-005819
Aug 7, 20261440001959173-26-005788
Aug 6, 202610-Q0001315257-26-000048
Aug 6, 20268-K0001315257-26-000046
Jul 31, 2026SCHEDULE 13G/A0002100119-26-001506
Jun 23, 202640001229771-26-000016
Jun 17, 202640001245155-26-000004
Jun 17, 202640001739998-26-000006
Jun 17, 202640001463649-26-000004
Jun 17, 202640001584601-26-000011
Jun 15, 202640001229771-26-000013
Jun 4, 202640001315257-26-000043
May 27, 202630002136316-26-000002
May 27, 202640002136316-26-000004
May 19, 2026SCHEDULE 13D0000921895-26-001441
May 14, 202640001229771-26-000010
May 14, 202640001776180-26-000006