https://approjects-warn-act-notices.static.hf.space/employers/k/koppers.html Every US WARN Act layoff notice filed by Koppers, rebuilt every morning from the state workforce-agency portals. Free, CC BY 4.0, no account. Full dataset: https://approjects-warn-act-notices.static.hf.space/ en-us Fri, 25 Sep 2026 00:00:00 +0000 https://github.com/APVentureEngine/warn-act-notices https://approjects-warn-act-notices.static.hf.space/search.html?q=Koppers 88d4a17369e02e6e Tue, 21 Apr 2026 00:00:00 +0000 Effective 2026-04-21. Filed as “Koppers Inc.”. Source: state workforce-agency WARN portal, re-scraped daily. https://approjects-warn-act-notices.static.hf.space/search.html?q=Koppers 3b4abf4d284de83b Wed, 01 Jun 2016 00:00:00 +0000 Type: Closing. Effective 2016-08-05. Filed as “Koppers Inc.”. Source: state workforce-agency WARN portal, re-scraped daily.