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Koppers Holdings Inc. — PRE 14A Filings

3 PRE 14A filings on record

This page lists all PRE 14A 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 3 PRE 14A 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
PRE 14A PRE 14A 0001193125-24-063704 Mar 8, 2024 May 2, 2024
PRE 14A PRE 14A 0001193125-15-083476 Mar 9, 2015 May 7, 2015
PRE 14A PRE 14A 0001193125-14-084722 Mar 5, 2014 May 2, 2014