| Form type | Sec Links | Description | Filing date | Reporting date |
|---|---|---|---|---|
| 10-Q | Report | Data | 10-Q | Nov 8, 2024 | Sep 30, 2024 |
| 8-K | Report | Data | 8-K | Nov 8, 2024 | Nov 8, 2024 |
| SC 13G/A | Report | Oct 18, 2024 | ||
| SC 13G/A | Report | Oct 7, 2024 | ||
| 10-Q | Report | Data | 10-Q | Aug 8, 2024 | Jun 30, 2024 |
| 8-K | Report | Data | 8-K | Aug 8, 2024 | Aug 8, 2024 |
| 10-Q | Report | Data | 10-Q | May 3, 2024 | Mar 31, 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 |
| 10-K | Report | Data | 10-K | Feb 28, 2024 | Dec 31, 2023 |
| 8-K | Report | Data | 8-K | Feb 28, 2024 | Feb 28, 2024 |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 13, 2024 | |
| 8-K | Report | Data | 8-K | Feb 13, 2024 | Feb 13, 2024 |
| SC 13G/A | Report | Feb 12, 2024 | ||
| SC 13G/A | Report | SC 13G/A | Feb 12, 2024 | |
| SC 13G | Report | SEC SCHEDULE 13G | Feb 9, 2024 | |
| SC 13G/A | Report | Jan 22, 2024 | ||
| 8-K | Report | Data | 8-K | Jan 2, 2024 | Jan 1, 2024 |
| 10-Q | Report | Data | 10-Q | Nov 3, 2023 | Sep 30, 2023 |
| 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 |
| 10-Q | Report | Data | 10-Q | Aug 3, 2023 | Jun 30, 2023 |
| 8-K | Report | Data | 8-K | Aug 3, 2023 | Aug 3, 2023 |
| 10-Q | Report | Data | 10-Q | May 5, 2023 | Mar 31, 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 |
| 10-K | Report | Data | 10-K | Feb 27, 2023 | Dec 31, 2022 |
| 8-K | Report | Data | 8-K | Feb 27, 2023 | Feb 27, 2023 |
| SC 13G/A | Report | Feb 14, 2023 | ||
| SC 13G/A | Report | SC 13G/A | Feb 10, 2023 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 9, 2023 | |
| SC 13G/A | Report | Jan 26, 2023 | ||
| SC 13G | Report | Jan 20, 2023 | ||
| 8-K | Report | Data | 8-K | Dec 13, 2022 | Dec 7, 2022 |
| 10-Q | Report | Data | 10-Q | Nov 4, 2022 | Sep 30, 2022 |
| 8-K | Report | Data | 8-K | Nov 4, 2022 | Nov 4, 2022 |
| 10-Q | Report | Data | 10-Q | Aug 4, 2022 | Jun 30, 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 |
| 10-Q | Report | Data | 10-Q | May 6, 2022 | Mar 31, 2022 |
| 8-K | Report | Data | 8-K | May 6, 2022 | May 5, 2022 |
| SC 13G/A | Report | Mar 2, 2022 | ||
| 10-K | Report | Data | 10-K | Feb 23, 2022 | Dec 31, 2021 |
| 8-K | Report | Data | 8-K | Feb 23, 2022 | Feb 23, 2022 |
| SC 13G | Report | SC 13G | Feb 14, 2022 | |
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 10, 2022 | |
| SC 13G/A | Report | Feb 8, 2022 | ||
| SC 13G/A | Report | Jan 28, 2022 | ||
| 8-K | Report | Data | 8-K | Dec 3, 2021 | Dec 1, 2021 |
| 10-Q | Report | Data | 10-Q | Nov 4, 2021 | Sep 30, 2021 |
| 8-K | Report | Data | 8-K | Nov 4, 2021 | Nov 4, 2021 |
| 10-Q | Report | Data | 10-Q | Aug 6, 2021 | Jun 30, 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 |
| 10-Q | Report | Data | 10-Q | May 7, 2021 | Mar 31, 2021 |
| 8-K | Report | Data | 8-K | May 7, 2021 | May 6, 2021 |
| 10-K | Report | Data | 10-K | Feb 24, 2021 | Dec 31, 2020 |
| 8-K | Report | Data | 8-K | Feb 24, 2021 | Feb 24, 2021 |
| SC 13G | Report | SCHEDULE 13G | Feb 12, 2021 | |
| SC 13G/A | Report | Feb 11, 2021 | ||
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 10, 2021 | |
| 8-K | Report | Data | 8-K | Jan 28, 2021 | Jan 28, 2021 |
| SC 13G/A | Report | Jan 26, 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 |
| 10-Q | Report | Data | 10-Q | Nov 4, 2020 | Sep 30, 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 |
| 10-Q | Report | Data | 10-Q | Aug 5, 2020 | Jun 30, 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 |
| 10-Q | Report | Data | 10-Q | May 7, 2020 | Mar 31, 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 |
| 10-K | Report | Data | 10-K | Feb 27, 2020 | Dec 31, 2019 |
| 8-K | Report | Data | 8-K | Feb 18, 2020 | Feb 18, 2020 |
| 8-K | Report | Data | 8-K | Feb 18, 2020 | Feb 18, 2020 |
| SC 13G | Report | SCHEDULE 13G | Feb 14, 2020 | |
| SC 13G/A | Report | Feb 14, 2020 | ||
| SC 13G/A | Report | Feb 13, 2020 | ||
| SC 13G/A | Report | SCHEDULE 13G/A | Feb 12, 2020 | |
| SC 13G/A | Report | Feb 4, 2020 | ||
| 8-K | Report | Data | 8-K SULLIVAN ANNOUNCEMENT | Jan 6, 2020 | Jan 1, 2020 |
| 10-Q | Report | Data | 10-Q | Nov 7, 2019 | Sep 30, 2019 |
| 8-K | Report | Data | 8-K | Nov 7, 2019 | Nov 7, 2019 |
| SC 13G/A | Report | DIVISION OF INVESTMENT, DEPARTMENT OF THE TREASURY,STATE OF NEW JERSEY | Sep 26, 2019 | |
| 10-Q | Report | Data | 10-Q | Aug 8, 2019 | Jun 30, 2019 |
| 8-K | Report | 8-K | Aug 8, 2019 | Aug 8, 2019 |
| 10-Q | Report | Data | 10-Q | May 3, 2019 | Mar 31, 2019 |
| 8-K | Report | KOP 8-K | May 3, 2019 | May 3, 2019 |
| SC 13G | Report | Apr 8, 2019 | ||
| 10-K | Report | Data | 10-K | Mar 1, 2019 | Dec 31, 2018 |
| 8-K | Report | 8-K | Mar 1, 2019 | Mar 1, 2019 |
| SC 13G/A | Report | SC 13G/A | Feb 14, 2019 | |
| SC 13G | Report | SCHEDULE 13G | Feb 14, 2019 | |
| SC 13G | Report | KOPPERS HOLDINGS INC. | Feb 14, 2019 | |
| SC 13G/A | Report | Jan 31, 2019 | ||
| SC 13G/A | Report | DIVISION OF INVESTMENT, DEPARTMENT OF THE TREASURY,STATE OF NEW JERSEY | Jan 31, 2019 | |
| SC 13G/A | Report | Jan 10, 2019 | ||
| 8-K | Report | 8-K | Nov 27, 2018 | Nov 27, 2018 |
| SC 13G | Report | DIVISION OF INVESTMENT, DEPARTMENT OF THE TREASURY,STATE OF NEW JERSEY | Nov 15, 2018 | |
| 10-Q | Report | Data | 10-Q | Nov 8, 2018 | Sep 30, 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 |
| 10-Q | Report | Data | 10-Q | Aug 9, 2018 | Jun 30, 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 |
| 10-Q | Report | Data | 10-Q | May 3, 2018 | Mar 31, 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 |
| 10-K | Report | Data | 10-K | Feb 27, 2018 | Dec 31, 2017 |
| 8-K | Report | 8-K | Feb 27, 2018 | Feb 27, 2018 |
| SC 13G | Report | SCHEDULE 13G | Feb 14, 2018 | |
| SC 13G/A | Report | Feb 14, 2018 | ||
| SC 13G/A | Report | SC 13G/A | Feb 12, 2018 | |
| SC 13G/A | Report | Feb 9, 2018 | ||
| SC 13G/A | Report | Jan 19, 2018 | ||
| 10-Q | Report | Data | 10-Q | Nov 9, 2017 | Sep 30, 2017 |
| 8-K | Report | 8-K | Nov 9, 2017 | Nov 9, 2017 |
| 8-K/A | Report | 8-K/A | Aug 3, 2017 | May 4, 2017 |
| 10-Q | Report | Data | 10-Q | Aug 3, 2017 | Jun 30, 2017 |
| 8-K | Report | Data | 8-K | Aug 3, 2017 | Aug 3, 2017 |
| 10-Q | Report | Data | FORM 10-Q | May 8, 2017 | Mar 31, 2017 |
| 8-K | Report | FORM 8-K | May 5, 2017 | May 4, 2017 |
| 10-K | Report | Data | KOP-10K-20161231 | Feb 24, 2017 | Dec 31, 2016 |
| 8-K | Report | FORM 8-K | Feb 23, 2017 | Feb 23, 2017 |
| SC 13G/A | Report | Feb 23, 2017 | ||
| 8-K | Report | 8-K | Feb 22, 2017 | Feb 17, 2017 |
| SC 13G | Report | SCHEDULE 13G | Feb 14, 2017 | |
| SC 13G/A | Report | SC 13G/A | Feb 10, 2017 | |
| SC 13G/A | Report | Feb 10, 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 |
| SC 13G/A | Report | Jan 12, 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 |
| 10-Q | Report | Data | FORM 10-Q | Nov 3, 2016 | Sep 30, 2016 |
| 8-K | Report | FORM 8-K | Nov 3, 2016 | Nov 3, 2016 |
| 10-Q | Report | Data | FORM 10-Q | Aug 4, 2016 | Jun 30, 2016 |
| 8-K | Report | FORM 8-K | Aug 4, 2016 | Aug 4, 2016 |
| SC 13G/A | Report | Jun 9, 2016 | ||
| 10-Q | Report | Data | 10-Q | May 6, 2016 | Mar 31, 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 |
| 10-K | Report | Data | 10-K | Feb 29, 2016 | Dec 31, 2015 |
| 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 |
| SC 13G | Report | SCHEDULE 13G | Feb 12, 2016 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 11, 2016 | |
| SC 13G | Report | SC 13G | Feb 10, 2016 | |
| SC 13G/A | Report | Feb 10, 2016 | ||
| SC 13G/A | Report | Feb 10, 2016 | ||
| SC 13G/A | Report | KOP AS OF 12/31/2015 | Feb 9, 2016 | |
| SC 13G/A | Report | Jan 26, 2016 | ||
| 8-K | Report | 8-K | Jan 13, 2016 | Jan 11, 2016 |
| 8-K | Report | FORM 8-K | Nov 13, 2015 | Nov 9, 2015 |
| 10-Q | Report | Data | 10-Q | Nov 5, 2015 | Sep 30, 2015 |
| 8-K | Report | FORM 8-K | Nov 5, 2015 | Nov 5, 2015 |
| SC 13G | Report | SCHEDULE 13G | Sep 4, 2015 | |
| 10-Q | Report | Data | FORM 10-Q | Aug 6, 2015 | Jun 30, 2015 |
| 8-K | Report | FORM 8-K | Aug 6, 2015 | Aug 6, 2015 |
| 10-Q | Report | Data | FORM 10-Q | May 8, 2015 | Mar 31, 2015 |
| 8-K | Report | FORM 8-K | May 8, 2015 | May 7, 2015 |
| 10-K | Report | Data | FORM 10-K | Mar 2, 2015 | Dec 31, 2014 |
| 8-K | Report | FORM 8-K | Feb 26, 2015 | Feb 26, 2015 |
| SC 13G | Report | SCHEDULE 13G | Feb 13, 2015 | |
| SC 13G/A | Report | KOP AS OF 12/31/2014 | Feb 13, 2015 | |
| SC 13G/A | Report | SEC SCHEDULE 13G | Feb 12, 2015 | |
| SC 13G/A | Report | Feb 10, 2015 | ||
| 8-K | Report | FORM 8-K | Feb 6, 2015 | Feb 4, 2015 |
| SC 13G/A | Report | Jan 22, 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 |
| 10-Q | Report | Data | FORM 10-Q | Nov 10, 2014 | Sep 30, 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 |
| 10-Q | Report | Data | FORM 10-Q | Aug 7, 2014 | Jun 30, 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 |
| 10-Q | Report | Data | FORM 10-Q | May 7, 2014 | Mar 31, 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 |
| 10-K | Report | Data | FORM 10-K | Mar 3, 2014 | Dec 31, 2013 |
| 8-K | Report | FORM 8-K | Feb 24, 2014 | Feb 18, 2014 |
| SC 13G | Report | DISCLOSURE DOCUMENT | Feb 14, 2014 | |
| 8-K | Report | FORM 8-K | Feb 13, 2014 | Feb 13, 2014 |
| SC 13G/A | Report | Feb 11, 2014 | ||
| SC 13G/A | Report | KOP AS OF 01/31/2014 | Feb 10, 2014 | |
| SC 13G/A | Report | KOP AS OF 12/31/2013 | Feb 7, 2014 | |
| SC 13G/A | Report | Jan 29, 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 |
| 10-Q | Report | Data | FORM 10-Q | Nov 7, 2013 | Sep 30, 2013 |
| 8-K | Report | FORM 8-K | Nov 7, 2013 | Nov 7, 2013 |
| 10-Q | Report | Data | FORM 10-Q | Aug 8, 2013 | Jun 30, 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 |
| SC 13G/A | Report | Jun 10, 2013 | ||
| 10-Q | Report | Data | FORM 10-Q | May 3, 2013 | Mar 31, 2013 |
| 8-K | Report | 8-K | May 3, 2013 | May 2, 2013 |
| 8-K | Report | FORM 8-K | Apr 1, 2013 | Mar 27, 2013 |
| 10-K | Report | Data | FORM 10-K | Feb 25, 2013 | Dec 31, 2012 |
| 8-K | Report | FORM 8-K | Feb 14, 2013 | Feb 14, 2013 |
| SC 13G/A | Report | Feb 14, 2013 | ||
| SC 13G | Report | Feb 13, 2013 | ||
| SC 13G/A | Report | Feb 11, 2013 | ||
| SC 13G/A | Report | Feb 8, 2013 | ||
| SC 13G/A | Report | KOP AS OF 12/31/12 | Feb 7, 2013 | |
| SC 13G/A | Report | Jan 10, 2013 | ||
| 10-Q | Report | Data | FORM 10-Q | Nov 9, 2012 | Sep 30, 2012 |
| 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 |
| 10-Q | Report | Data | FORM 10-Q | Aug 9, 2012 | Jun 30, 2012 |
| 8-K | Report | FORM 8-K | Aug 9, 2012 | Aug 9, 2012 |
| SC 13G/A | Report | Jul 10, 2012 | ||
| 8-K | Report | Data | FORM 8-K | Jun 27, 2012 | Jun 27, 2012 |
| 10-Q | Report | Data | FORM 10-Q | May 4, 2012 | Mar 31, 2012 |
| 8-K | Report | FORM 8-K | May 4, 2012 | May 3, 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 |
| 8-K | Report | FORM 8-K | Feb 16, 2012 | Feb 16, 2012 |
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G/A | Report | Feb 14, 2012 | ||
| SC 13G/A | Report | Feb 13, 2012 | ||
| SC 13G | Report | Feb 10, 2012 | ||
| SC 13G/A | Report | KOP AS OF 12/31/11 | Feb 10, 2012 | |
| SC 13G | Report | Feb 9, 2012 | ||
| SC 13G/A | Report | Feb 7, 2012 | ||
| 8-K | Report | FORM 8-K | Dec 6, 2011 | Dec 2, 2011 |
| 10-Q | Report | Data | FORM 10-Q | Nov 4, 2011 | Sep 30, 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 |
| 10-Q | Report | Data | FORM 10-Q | Aug 4, 2011 | Jun 30, 2011 |
| 8-K | Report | FORM 8-K | May 9, 2011 | May 4, 2011 |
| 10-Q | Report | Data | FORM 10-Q | May 5, 2011 | Mar 31, 2011 |
| 8-K | Report | FORM 8-K | Mar 29, 2011 | Mar 25, 2011 |
| 10-K | Report | Data | FORM 10-K | Feb 22, 2011 | Dec 31, 2010 |
| 8-K | Report | FORM 8-K | Feb 17, 2011 | Feb 16, 2011 |
| SC 13G | Report | Feb 14, 2011 | ||
| SC 13G/A | Report | KOPPERS HOLDINGS, INC. | Feb 14, 2011 | |
| SC 13G/A | Report | Feb 9, 2011 | ||
| SC 13G/A | Report | KOP AS OF 12/31/2010 | Feb 9, 2011 | |
| SC 13G/A | Report | Feb 7, 2011 | ||
| SC 13G | Report | Feb 7, 2011 | ||
| SC 13G/A | Report | KOPPERS HOLDINGS, INC. | Jan 10, 2011 | |
| 8-K | Report | FORM 8-K | Nov 5, 2010 | Nov 4, 2010 |
| 10-Q | Report | Data | FORM 10-Q | Nov 4, 2010 | Sep 30, 2010 |
| 8-K | Report | FORM 8-K | Aug 6, 2010 | Aug 5, 2010 |
| 10-Q | Report | Data | FORM 10-Q | Aug 5, 2010 | Jun 30, 2010 |
| 8-K | Report | FORM 8-K | Jul 16, 2010 | Jul 16, 2010 |
| SC 13G | Report | Jun 10, 2010 | ||
| 10-Q | Report | FORM 10-Q | May 10, 2010 | Mar 31, 2010 |
| 8-K | Report | FORM 8-K | May 7, 2010 | May 6, 2010 |
| SC 13G/A | Report | Apr 9, 2010 | ||
| 8-K | Report | FORM 8-K | Feb 23, 2010 | Feb 23, 2010 |
| 10-K | Report | FORM 10-K | Feb 19, 2010 | Dec 31, 2009 |
| 8-K | Report | FORM 8-K | Feb 18, 2010 | Feb 17, 2010 |
| SC 13G | Report | Feb 16, 2010 | ||
| SC 13G/A | Report | AMENDMENT NO. 2 | Feb 12, 2010 | |
| SC 13G/A | Report | KOP AS OF 12/31/2009 | Feb 12, 2010 | |
| SC 13G/A | Report | KOPPERS HOLDINGS, INC. | Feb 12, 2010 | |
| SC 13G | Report | KOPPERS HOLDINGS, INC. | Feb 12, 2010 | |
| SC 13G | Report | Feb 9, 2010 | ||
| 8-K | Report | FORM 8-K | Feb 5, 2010 | Feb 2, 2010 |
| SC 13G | Report | Jan 29, 2010 | ||
| 10-Q | Report | FORM 10-Q | Nov 5, 2009 | Sep 30, 2009 |
| 10-Q | Report | FORM 10-Q | Aug 6, 2009 | Jun 30, 2009 |
| 10-Q | Report | FORM 10-Q | May 7, 2009 | Mar 31, 2009 |
| 10-K | Report | FORM 10-K | Feb 20, 2009 | Dec 31, 2008 |
| 10-Q | Report | FORM 10-Q | Nov 6, 2008 | Sep 30, 2008 |
| 10-Q | Report | FORM 10-Q | Aug 7, 2008 | Jun 30, 2008 |
| 10-Q | Report | FORM 10-Q | May 9, 2008 | Mar 31, 2008 |
| 10-K | Report | FORM 10-K | Feb 22, 2008 | Dec 31, 2007 |
| 10-Q | Report | FORM 10-Q | Nov 8, 2007 | Sep 30, 2007 |
| 10-Q | Report | FORM 10-Q | Aug 9, 2007 | Jun 30, 2007 |
| 10-Q | Report | FORM 10-Q | May 3, 2007 | Mar 31, 2007 |
| 10-K | Report | FORM 10-K | Feb 22, 2007 | Dec 31, 2006 |
| 10-Q | Report | QUARTERLY REPORT | Nov 6, 2006 | Sep 30, 2006 |
| 10-Q | Report | FORM 10-Q | Aug 4, 2006 | Jun 30, 2006 |
| 10-Q | Report | FORM 10-Q | May 11, 2006 | Mar 31, 2006 |
| 10-K | Report | FORM 10-K | Mar 21, 2006 | Dec 31, 2005 |
| 10-Q | Report | FORM 10-Q | Nov 14, 2005 | Sep 30, 2005 |
| 10-Q | Report | FORM 10Q | Aug 10, 2005 | Jun 30, 2005 |
| 10-Q | Report | FORM 10-Q | May 20, 2005 | Mar 31, 2005 |