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Koppers Holdings Inc. — 424B3 Filings

7 424B3 filings on record

This page lists all 424B3 filings submitted to the SEC by Koppers Holdings Inc. (KOP), sorted by most recent first. Each row links to the full filing on EdgarLookup. Koppers Holdings Inc. has filed 7 424B3 documents with the SEC since 2015. To view all SEC filings by Koppers Holdings Inc., see the full filings list.

Overview All Filings Financials Insiders
All 10-K 10-K/A 10-Q 144 144/A 3 3/A 4 4/A 424B1 424B3 5 5/A 8-A12B 8-K 8-K/A ARS CERTNYS CORRESP DEF 14A DEFA14A EFFECT POS AM POSASR PRE 14A S-1 S-1/A S-3 S-3/A S-3ASR S-4 S-4/A S-8 SC 13G SC 13G/A SCHEDULE 13G SCHEDULE 13G/A UPLOAD
Form Description Accession Number Filed Period
424B3 424B3 0001193125-20-051059 Feb 27, 2020
424B3 FORM 424B3 0001193125-10-120132 May 14, 2010
424B3 FORM 424B3 0001193125-09-197961 Sep 25, 2009
424B3 PROSPECTUS SUPPLEMENT 0001193125-07-040319 Feb 27, 2007
424B3 FORM 424B3 0001193125-06-242748 Nov 28, 2006
424B3 PROSPECTUS FILED PURSUANT TO RULE 424B3 0001193125-06-188780 Sep 11, 2006
424B3 FORM 424B3 0001193125-05-085551 Apr 27, 2005