373 filings
10-Q
2024 Q1
KOP
Koppers Holdings Inc
Quarterly report
3 May 24
2:01pm
8-K
KOP
Koppers Holdings Inc
3 May 24
Koppers Reports First Quarter 2024 Results; Provides Updated 2024 Outlook
8:26am
8-K/A
KOP
Koppers Holdings Inc
2 May 24
Departure of Directors or Certain Officers
4:15pm
8-K
KOP
Koppers Holdings Inc
15 Apr 24
Entry into a Material Definitive Agreement
8:06am
ARS
2023 FY
KOP
Koppers Holdings Inc
2 Apr 24
Annual report to shareholders
4:37pm
8-K
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28 Feb 24
Koppers Reports Fourth Quarter and Full-Year 2023 Results; Provides 2024 Outlook
8:17am
8-K
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13 Feb 24
Koppers Holdings Names Nishan J. Vartanian to Board
4:30pm
8-K
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2 Jan 24
Koppers Names James A. Sullivan President and Chief Operating Officer
4:30pm
8-K
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3 Nov 23
Koppers Reports Third Quarter 2023 Results; Reaffirms 2023 Outlook
8:21am
8-K
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12 Oct 23
Koppers Announces Successful Completion of Term Loan B Repricing
8:46am
8-K
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14 Sep 23
Koppers Holdings Inc. Announces Increase to 2023 Outlook
8:32am
8-K
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3 Aug 23
Amendments to Articles of Incorporation or Bylaws
4:34pm
8-K
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3 Aug 23
Koppers Reports Second Quarter 2023 Results; Reaffirms 2023 Outlook
8:27am
8-K
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5 May 23
Koppers Reports First Quarter 2023 Results; Reaffirms 2023 Outlook
8:40am