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Koppers Holdings Inc. — 10-Q Filings

63 10-Q filings on record

This page lists all 10-Q 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 63 10-Q 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
10-Q 10-Q 0001315257-25-000012 Nov 7, 2025 Sep 30, 2025
10-Q 10-Q 0000950170-25-105595 Aug 8, 2025 Jun 30, 2025
10-Q 10-Q 0000950170-25-067733 May 9, 2025 Mar 31, 2025
10-Q 10-Q 0000950170-24-123804 Nov 8, 2024 Sep 30, 2024
10-Q 10-Q 0000950170-24-093561 Aug 8, 2024 Jun 30, 2024
10-Q 10-Q 0000950170-24-052678 May 3, 2024 Mar 31, 2024
10-Q 10-Q 0000950170-23-058640 Nov 3, 2023 Sep 30, 2023
10-Q 10-Q 0000950170-23-037727 Aug 3, 2023 Jun 30, 2023
10-Q 10-Q 0000950170-23-018172 May 5, 2023 Mar 31, 2023
10-Q 10-Q 0000950170-22-022129 Nov 4, 2022 Sep 30, 2022
10-Q 10-Q 0001564590-22-027965 Aug 4, 2022 Jun 30, 2022
10-Q 10-Q 0001564590-22-018495 May 6, 2022 Mar 31, 2022
10-Q 10-Q 0001564590-21-054369 Nov 4, 2021 Sep 30, 2021
10-Q 10-Q 0001564590-21-042020 Aug 6, 2021 Jun 30, 2021
10-Q 10-Q 0001564590-21-025405 May 7, 2021 Mar 31, 2021
10-Q 10-Q 0001564590-20-050220 Nov 4, 2020 Sep 30, 2020
10-Q 10-Q 0001564590-20-036474 Aug 5, 2020 Jun 30, 2020
10-Q 10-Q 0001564590-20-022489 May 7, 2020 Mar 31, 2020
10-Q 10-Q 0001564590-19-041474 Nov 7, 2019 Sep 30, 2019
10-Q 10-Q 0001564590-19-030584 Aug 8, 2019 Jun 30, 2019
10-Q 10-Q 0001564590-19-015570 May 3, 2019 Mar 31, 2019
10-Q 10-Q 0001564590-18-028498 Nov 8, 2018 Sep 30, 2018
10-Q 10-Q 0001564590-18-020999 Aug 9, 2018 Jun 30, 2018
10-Q 10-Q 0001564590-18-010651 May 3, 2018 Mar 31, 2018
10-Q 10-Q 0001564590-17-023120 Nov 9, 2017 Sep 30, 2017
10-Q 10-Q 0001564590-17-015264 Aug 3, 2017 Jun 30, 2017
10-Q FORM 10-Q 0001564590-17-009432 May 8, 2017 Mar 31, 2017
10-Q FORM 10-Q 0001564590-16-027404 Nov 3, 2016 Sep 30, 2016
10-Q FORM 10-Q 0001564590-16-022745 Aug 4, 2016 Jun 30, 2016
10-Q 10-Q 0001564590-16-018318 May 6, 2016 Mar 31, 2016
10-Q 10-Q 0001564590-15-009720 Nov 5, 2015 Sep 30, 2015
10-Q FORM 10-Q 0001193125-15-281195 Aug 6, 2015 Jun 30, 2015
10-Q FORM 10-Q 0001193125-15-179425 May 8, 2015 Mar 31, 2015
10-Q FORM 10-Q 0001193125-14-406321 Nov 10, 2014 Sep 30, 2014
10-Q FORM 10-Q 0001193125-14-300849 Aug 7, 2014 Jun 30, 2014
10-Q FORM 10-Q 0001193125-14-187665 May 7, 2014 Mar 31, 2014
10-Q FORM 10-Q 0001193125-13-432902 Nov 7, 2013 Sep 30, 2013
10-Q FORM 10-Q 0001193125-13-326845 Aug 8, 2013 Jun 30, 2013
10-Q FORM 10-Q 0001193125-13-198444 May 3, 2013 Mar 31, 2013
10-Q FORM 10-Q 0001193125-12-463469 Nov 9, 2012 Sep 30, 2012
10-Q FORM 10-Q 0001193125-12-346781 Aug 9, 2012 Jun 30, 2012
10-Q FORM 10-Q 0001193125-12-212051 May 4, 2012 Mar 31, 2012
10-Q FORM 10-Q 0001193125-11-297243 Nov 4, 2011 Sep 30, 2011
10-Q FORM 10-Q 0001193125-11-209894 Aug 4, 2011 Jun 30, 2011
10-Q FORM 10-Q 0001193125-11-128361 May 5, 2011 Mar 31, 2011
10-Q FORM 10-Q 0001193125-10-248120 Nov 4, 2010 Sep 30, 2010
10-Q FORM 10-Q 0001193125-10-178796 Aug 5, 2010 Jun 30, 2010
10-Q FORM 10-Q 0001193125-10-114636 May 10, 2010 Mar 31, 2010
10-Q FORM 10-Q 0001193125-09-225722 Nov 5, 2009 Sep 30, 2009
10-Q FORM 10-Q 0001193125-09-167226 Aug 6, 2009 Jun 30, 2009