Latest market price
41.83
+0.33+0.80%
KOPQT67Koppers Holdings Inc.·NYSE
41.83+0.80%

Latest SEC Filings

Form category
DescriptionFilingDocument
Oct 30, 2026SC 13GBeneficial ownership statement (passive)
Oct 22, 2026SC 13D/ABeneficial ownership statement (active, amended)
Oct 19, 2026SC 13G/ABeneficial ownership statement (passive, amended)
Oct 08, 2026SC 13G/ABeneficial ownership statement (passive, amended)
Sep 15, 20264Statement of changes in beneficial ownership
Sep 15, 20264Statement of changes in beneficial ownership
Sep 15, 20264Statement of changes in beneficial ownership
Sep 15, 20264Statement of changes in beneficial ownership
Sep 01, 20264Statement of changes in beneficial ownership
Aug 20, 20264Statement of changes in beneficial ownership
Aug 13, 20264Statement of changes in beneficial ownership
Aug 12, 20264Statement of changes in beneficial ownership
Aug 11, 20264Statement of changes in beneficial ownership
Aug 11, 20264Statement of changes in beneficial ownership
Aug 06, 20268-KCurrent report
Aug 06, 202610-QQuarterly report
Jul 31, 2026SC 13G/ABeneficial ownership statement (passive, amended)
Jun 23, 20264Statement of changes in beneficial ownership
Jun 17, 20264Statement of changes in beneficial ownership
Jun 17, 20264Statement of changes in beneficial ownership
Jun 17, 20264Statement of changes in beneficial ownership
Jun 17, 20264Statement of changes in beneficial ownership
Jun 15, 20264Statement of changes in beneficial ownership
Jun 04, 20264Statement of changes in beneficial ownership
May 27, 20264Statement of changes in beneficial ownership