Koppers Holdings Inc. 10-K, 10-K/A, 10-KT, and 10-KT/A reports

Location
436 Seventh Avenue, Pittsburgh, Pennsylvania
State of incorporation
Pennsylvania
Fiscal year end
December 31
Data updated at
8/8/2024, 12:18 PM
Form type Sec Links Description Filing date Reporting date
10-K Report | Data 10-K Feb 28, 2024 Dec 31, 2023
10-K Report | Data 10-K Feb 27, 2023 Dec 31, 2022
10-K Report | Data 10-K Feb 23, 2022 Dec 31, 2021
10-K Report | Data 10-K Feb 24, 2021 Dec 31, 2020
10-K Report | Data 10-K Feb 27, 2020 Dec 31, 2019
10-K Report | Data 10-K Mar 1, 2019 Dec 31, 2018
10-K Report | Data 10-K Feb 27, 2018 Dec 31, 2017
10-K Report | Data KOP-10K-20161231 Feb 24, 2017 Dec 31, 2016
10-K Report | Data 10-K Feb 29, 2016 Dec 31, 2015
10-K Report | Data FORM 10-K Mar 2, 2015 Dec 31, 2014
10-K Report | Data FORM 10-K Mar 3, 2014 Dec 31, 2013
10-K Report | Data FORM 10-K Feb 25, 2013 Dec 31, 2012
10-K/A Report | Data AMENDMENT NO.1 TO FORM 10-K Mar 27, 2012 Dec 31, 2011
10-K Report FORM 10-K Feb 27, 2012 Dec 31, 2011
10-K Report | Data FORM 10-K Feb 22, 2011 Dec 31, 2010
10-K Report FORM 10-K Feb 19, 2010 Dec 31, 2009
10-K Report FORM 10-K Feb 20, 2009 Dec 31, 2008
10-K Report FORM 10-K Feb 22, 2008 Dec 31, 2007
10-K Report FORM 10-K Feb 22, 2007 Dec 31, 2006
10-K Report FORM 10-K Mar 21, 2006 Dec 31, 2005