Latest filings (excl ownership)
8-K
Entry into a Material Definitive Agreement
15 Apr 24
ARS
2023 FY
Annual report to shareholders
2 Apr 24
DEF 14A
Definitive proxy
2 Apr 24
PRE 14A
Preliminary proxy
8 Mar 24
10-K
2023 FY
Annual report
28 Feb 24
8-K
Koppers Reports Fourth Quarter and Full-Year 2023 Results; Provides 2024 Outlook
28 Feb 24
8-K
Koppers Holdings Names Nishan J. Vartanian to Board
13 Feb 24
8-K
Koppers Names James A. Sullivan President and Chief Operating Officer
2 Jan 24
10-Q
2023 Q3
Quarterly report
3 Nov 23
8-K
Koppers Reports Third Quarter 2023 Results; Reaffirms 2023 Outlook
3 Nov 23
8-K
Koppers Announces Successful Completion of Term Loan B Repricing
12 Oct 23
8-K
Koppers Holdings Inc. Announces Increase to 2023 Outlook
14 Sep 23
8-K
Amendments to Articles of Incorporation or Bylaws
3 Aug 23
10-Q
2023 Q2
Quarterly report
3 Aug 23
8-K
Koppers Reports Second Quarter 2023 Results; Reaffirms 2023 Outlook
3 Aug 23
10-Q
2023 Q1
Quarterly report
5 May 23
8-K
Koppers Reports First Quarter 2023 Results; Reaffirms 2023 Outlook
5 May 23
8-K/A
Departure of Directors or Certain Officers
4 May 23
UPLOAD
Letter from SEC
28 Apr 23
CORRESP
Correspondence with SEC
25 Apr 23
8-K
Entry into a Material Definitive Agreement
11 Apr 23
UPLOAD
Letter from SEC
11 Apr 23
ARS
2022 FY
Annual report to shareholders
3 Apr 23
DEF 14A
Definitive proxy
3 Apr 23
8-K
Koppers Holdings Names Andrew D. Sandifer to Board
22 Mar 23
8-K
Koppers Announces Pricing and Allocation of $400 Million Term Loan B
10 Mar 23
10-K
2022 FY
Annual report
27 Feb 23
8-K
Koppers Reports Fourth Quarter and Full-Year 2022 Results; Provides 2023 Outlook
27 Feb 23
8-K
Departure of Directors or Certain Officers
13 Dec 22
10-Q
2022 Q3
Quarterly report
4 Nov 22
8-K
Koppers Reports Third Quarter 2022 Results
4 Nov 22
10-Q
2022 Q2
Quarterly report
4 Aug 22
8-K
Koppers Reports Second Quarter 2022 Results
4 Aug 22
8-K
Koppers Secures New $800 Million Credit Facility
21 Jun 22
10-Q
2022 Q1
Quarterly report
6 May 22
8-K
Koppers Reports First Quarter 2022 Results
6 May 22
DEF 14A
Definitive proxy
4 Apr 22
10-K
2021 FY
Annual report
23 Feb 22
8-K
Koppers Reports Fourth Quarter and Full-Year 2021 Results; Provides 2022 Outlook
23 Feb 22
8-K
Departure of Directors or Certain Officers
3 Dec 21
Latest ownership filings
4
Stephen G Lucas
15 Apr 24
4
Stephen G Lucas
27 Mar 24
4
TRACI L JENSEN
27 Mar 24
4
ALBERT J NEUPAVER
27 Mar 24
4
Andrew D Sandifer
27 Mar 24
4
LOUIS L TESTONI
27 Mar 24
4
Stephen R Tritch
27 Mar 24
4
DAVID L MOTLEY
27 Mar 24
4
Xudong Feng
27 Mar 24
4
SONJA MICHELLE WILKERSON
27 Mar 24
4
Leslie S Hyde
22 Mar 24
144
Notice of proposed sale of securities
21 Mar 24
4
Kevin Washington
7 Mar 24
4
Joseph P Dowd
7 Mar 24
4
James A. Sullivan
7 Mar 24
4
M LEROY BALL
7 Mar 24
4
James A. Sullivan
6 Mar 24
4
M LEROY BALL
6 Mar 24
4
Joseph P Dowd
6 Mar 24
144
Notice of proposed sale of securities
6 Mar 24
144/A
Notice of proposed sale of securities (amended)
6 Mar 24
144
Notice of proposed sale of securities
6 Mar 24
144
Notice of proposed sale of securities
6 Mar 24
4
James A. Sullivan
5 Mar 24
4
Leslie S Hyde
5 Mar 24
4
Joseph P Dowd
5 Mar 24
4
Jimmi Sue Smith
5 Mar 24
4
Daniel J Skrovanek
5 Mar 24
4
Bradley A Pearce
5 Mar 24
4
M LEROY BALL
5 Mar 24
4
Stephanie L Apostolou
5 Mar 24
144
Notice of proposed sale of securities
5 Mar 24
144
Notice of proposed sale of securities
5 Mar 24
144
Notice of proposed sale of securities
5 Mar 24
144
Notice of proposed sale of securities
4 Mar 24
144
Notice of proposed sale of securities
4 Mar 24
144
Notice of proposed sale of securities
4 Mar 24
144
Notice of proposed sale of securities
1 Mar 24
144
Notice of proposed sale of securities
1 Mar 24
144
Notice of proposed sale of securities
1 Mar 24