Koppers Holdings Inc. 8-K and 8-K/A reports

Location
436 Seventh Avenue, Pittsburgh, PA
State of incorporation
PA
Fiscal year end
December 31
Data updated at
11/8/2024, 12:01 PM
Form type Sec Links Description Filing date Reporting date
8-K Report | Data 8-K Nov 8, 2024 Nov 8, 2024
8-K Report | Data 8-K Aug 8, 2024 Aug 8, 2024
8-K Report | Data 8-K May 3, 2024 May 2, 2024
8-K/A Report | Data 8-K/A May 2, 2024 May 2, 2024
8-K Report | Data 8-K Apr 15, 2024 Apr 12, 2024
8-K Report | Data 8-K Feb 28, 2024 Feb 28, 2024
8-K Report | Data 8-K Feb 13, 2024 Feb 13, 2024
8-K Report | Data 8-K Jan 2, 2024 Jan 1, 2024
8-K Report | Data 8-K Nov 3, 2023 Nov 3, 2023
8-K Report | Data 8-K Oct 12, 2023 Oct 11, 2023
8-K Report | Data 8-K Sep 14, 2023 Sep 14, 2023
8-K Report | Data 8-K Aug 3, 2023 Aug 2, 2023
8-K Report | Data 8-K Aug 3, 2023 Aug 3, 2023
8-K Report | Data 8-K May 5, 2023 May 4, 2023
8-K/A Report | Data 8-K/A May 4, 2023 May 4, 2023
8-K Report | Data 8-K Apr 11, 2023 Apr 10, 2023
8-K Report | Data 8-K Mar 22, 2023 Mar 20, 2023
8-K Report | Data 8-K Mar 10, 2023 Mar 10, 2023
8-K Report | Data 8-K Feb 27, 2023 Feb 27, 2023
8-K Report | Data 8-K Dec 13, 2022 Dec 7, 2022
8-K Report | Data 8-K Nov 4, 2022 Nov 4, 2022
8-K Report | Data 8-K Aug 4, 2022 Aug 4, 2022
8-K Report | Data FORM 8-K Jun 21, 2022 Jun 17, 2022
8-K Report | Data 8-K May 6, 2022 May 5, 2022
8-K Report | Data 8-K Feb 23, 2022 Feb 23, 2022
8-K Report | Data 8-K Dec 3, 2021 Dec 1, 2021
8-K Report | Data 8-K Nov 4, 2021 Nov 4, 2021
8-K Report | Data 8-K Aug 6, 2021 Aug 6, 2021
8-K Report | Data 8-K Aug 6, 2021 Aug 6, 2021
8-K Report | Data 8-K May 7, 2021 May 6, 2021
8-K Report | Data 8-K Feb 24, 2021 Feb 24, 2021
8-K Report | Data 8-K Jan 28, 2021 Jan 28, 2021
8-K Report | Data 8-K Dec 17, 2020 Dec 17, 2020
8-K Report | Data 8-K Nov 19, 2020 Nov 19, 2020
8-K Report | Data 8-K Nov 4, 2020 Nov 4, 2020
8-K Report | Data 8-K Oct 26, 2020 Oct 26, 2020
8-K Report | Data 8-K Sep 30, 2020 Sep 30, 2020
8-K Report | Data 8-K Sep 22, 2020 Sep 22, 2020
8-K Report | Data 8-K Aug 25, 2020 Aug 25, 2020
8-K Report | Data 8-K Aug 5, 2020 Aug 5, 2020
8-K Report | Data 8-K Jul 27, 2020 Jul 27, 2020
8-K Report | Data 8-K Jun 17, 2020 Jun 17, 2020
8-K Report | Data 8-K May 20, 2020 May 20, 2020
8-K Report | Data 8-K May 7, 2020 May 6, 2020
8-K Report | Data 8-K Apr 27, 2020 Apr 27, 2020
8-K Report | Data 8-K Feb 27, 2020 Feb 27, 2020
8-K Report | Data 8-K Feb 27, 2020 Feb 26, 2020
8-K Report | Data 8-K Feb 18, 2020 Feb 18, 2020
8-K Report | Data 8-K Feb 18, 2020 Feb 18, 2020
8-K Report | Data 8-K SULLIVAN ANNOUNCEMENT Jan 6, 2020 Jan 1, 2020
8-K Report | Data 8-K Nov 7, 2019 Nov 7, 2019
8-K Report 8-K Aug 8, 2019 Aug 8, 2019
8-K Report KOP 8-K May 3, 2019 May 3, 2019
8-K Report 8-K Mar 1, 2019 Mar 1, 2019
8-K Report 8-K Nov 27, 2018 Nov 27, 2018
8-K Report 8-K Nov 8, 2018 Nov 8, 2018
8-K Report HILLENBRAND_TRITCH Oct 17, 2018 Oct 11, 2018
8-K Report 8-K Sep 11, 2018 Sep 10, 2018
8-K Report 8-K Aug 9, 2018 Aug 9, 2018
8-K/A Report 8-K/A Jun 25, 2018 Apr 10, 2018
8-K Report 8-K May 3, 2018 May 3, 2018
8-K Report CREDIT AGREEMENT AMENDMENT AND MERGER Apr 13, 2018 Apr 10, 2018
8-K Report 8-K Feb 27, 2018 Feb 27, 2018
8-K Report 8-K Nov 9, 2017 Nov 9, 2017
8-K/A Report 8-K/A Aug 3, 2017 May 4, 2017
8-K Report | Data 8-K Aug 3, 2017 Aug 3, 2017
8-K Report FORM 8-K May 5, 2017 May 4, 2017
8-K Report FORM 8-K Feb 23, 2017 Feb 23, 2017
8-K Report 8-K Feb 22, 2017 Feb 17, 2017
8-K Report FORM 8-K Jan 25, 2017 Jan 25, 2017
8-K Report FORM 8-K Jan 20, 2017 Jan 19, 2017
8-K Report FORM 8-K Jan 20, 2017 Jan 19, 2017
8-K Report FORM 8-K Jan 13, 2017 Jan 13, 2017
8-K Report FORM 8-K Jan 10, 2017 Jan 10, 2017
8-K Report FORM 8-K Jan 5, 2017 Jan 5, 2017
8-K Report FORM 8-K Dec 14, 2016 Dec 14, 2016
8-K Report FORM 8-K Nov 3, 2016 Nov 3, 2016
8-K Report FORM 8-K Aug 4, 2016 Aug 4, 2016
8-K Report | Data 8-K May 6, 2016 May 5, 2016
8-K Report 8-K Apr 14, 2016 Apr 8, 2016
8-K Report 8-K Mar 29, 2016 Mar 23, 2016
8-K Report FORM 8-K Feb 26, 2016 Feb 25, 2016
8-K Report 8-K Feb 25, 2016 Feb 25, 2016
8-K Report 8-K Feb 22, 2016 Feb 16, 2016
8-K Report 8-K Jan 13, 2016 Jan 11, 2016
8-K Report FORM 8-K Nov 13, 2015 Nov 9, 2015
8-K Report FORM 8-K Nov 5, 2015 Nov 5, 2015
8-K Report FORM 8-K Aug 6, 2015 Aug 6, 2015
8-K Report FORM 8-K May 8, 2015 May 7, 2015
8-K Report FORM 8-K Feb 26, 2015 Feb 26, 2015
8-K Report FORM 8-K Feb 6, 2015 Feb 4, 2015
8-K Report FORM 8-K Jan 22, 2015 Jan 22, 2015
8-K Report FORM 8-K Jan 14, 2015 Jan 14, 2015
8-K Report FORM 8-K Dec 9, 2014 Dec 4, 2014
8-K Report FORM 8-K Nov 7, 2014 Nov 6, 2014
8-K Report FORM 8-K Nov 6, 2014 Nov 6, 2014
8-K/A Report AMENDMENT NO. 1 TO FORM 8-K Oct 30, 2014 Aug 15, 2014
8-K Report 8-K Sep 8, 2014 Sep 8, 2014
8-K Report FORM 8-K Aug 21, 2014 Aug 15, 2014
8-K Report FORM 8-K Aug 7, 2014 Aug 7, 2014
8-K Report FORM 8-K Aug 7, 2014 Aug 7, 2014
8-K Report FORM 8-K Jul 30, 2014 Jul 25, 2014
8-K Report FORM 8-K May 5, 2014 May 2, 2014
8-K Report FORM 8-K Apr 28, 2014 Apr 25, 2014
8-K Report FORM 8-K Apr 28, 2014 Apr 25, 2014
8-K Report FORM 8-K Apr 14, 2014 Apr 13, 2014
8-K Report FORM 8-K Feb 24, 2014 Feb 18, 2014
8-K Report FORM 8-K Feb 13, 2014 Feb 13, 2014
8-K Report FORM 8-K Jan 22, 2014 Jan 22, 2014
8-K Report FORM 8-K Jan 8, 2014 Jan 7, 2014
8-K Report FORM 8-K Dec 18, 2013 Dec 13, 2013
8-K Report FORM 8-K Nov 7, 2013 Nov 7, 2013
8-K Report FORM 8-K Aug 8, 2013 Aug 8, 2013
8-K Report FORM 8-K Jul 16, 2013 Jul 15, 2013
8-K Report 8-K May 3, 2013 May 2, 2013
8-K Report FORM 8-K Apr 1, 2013 Mar 27, 2013
8-K Report FORM 8-K Feb 14, 2013 Feb 14, 2013
8-K Report FORM 8-K Nov 8, 2012 Nov 8, 2012
8-K Report FORM 8-K Sep 14, 2012 Sep 10, 2012
8-K Report FORM 8-K Aug 10, 2012 Aug 6, 2012
8-K Report FORM 8-K Aug 9, 2012 Aug 9, 2012
8-K Report | Data FORM 8-K Jun 27, 2012 Jun 27, 2012
8-K Report FORM 8-K May 4, 2012 May 3, 2012
8-K Report FORM 8-K Feb 16, 2012 Feb 16, 2012
8-K Report FORM 8-K Dec 6, 2011 Dec 2, 2011
8-K Report FORM 8-K Nov 3, 2011 Nov 3, 2011
8-K Report FORM 8-K Aug 5, 2011 Aug 4, 2011
8-K/A Report AMENDMENT NO. 1 TO FORM 8-K Aug 5, 2011 May 4, 2011
8-K Report FORM 8-K May 9, 2011 May 4, 2011
8-K Report FORM 8-K Mar 29, 2011 Mar 25, 2011
8-K Report FORM 8-K Feb 17, 2011 Feb 16, 2011
8-K Report FORM 8-K Nov 5, 2010 Nov 4, 2010
8-K Report FORM 8-K Aug 6, 2010 Aug 5, 2010
8-K Report FORM 8-K Jul 16, 2010 Jul 16, 2010
8-K Report FORM 8-K May 7, 2010 May 6, 2010
8-K Report FORM 8-K Feb 23, 2010 Feb 23, 2010
8-K Report FORM 8-K Feb 18, 2010 Feb 17, 2010
8-K Report FORM 8-K Feb 5, 2010 Feb 2, 2010