| Filed On | Filing |
|---|---|
| 07 May 2026 |
8-K/A: Departure/Election of Directors or Officers; Compensation
On November 5, 2025, Koppers Holdings Inc. (the “Company”) filed a Current Report on Form 8-K (the “Original 8-K”) to report, among other things, the election of Laura J. Posadas as a member of the Board of Directors (the “Board”) of the... |
| 18 Mar 2026 |
8-K/A: Departure/Election of Directors or Officers; Compensation
On March 9, 2026, KI and Ms. Smith entered into a transition agreement (the “Transition Agreement”), effective as of March 17, 2026, in connection with Ms. Smith’s: (i) provision of continued services as Koppers’ Treasurer from January 5... |
| 03 Dec 2025 |
8-K/A: Costs Associated with Exit or Disposal Activities
The Company estimates pre-tax restructuring charges, employee severance charges and related benefit costs for actions associated with the workforce reduction program to be in the range of $4 million to $5 million, which the Company antic... |
| 02 May 2024 |
8-K/A: Departure/Election of Directors or Officers; Compensation
On February 13, 2024, Koppers Holdings Inc. (the “Company”) filed a Current Report on Form 8-K (the “Original 8-K”) to report, among other things, the election of Nishan J. Vartanian as a member of the Board of Directors (the “Board”) of... |
| 04 May 2023 |
8-K/A: Departure/Election of Directors or Officers; Compensation
On March 22, 2023, Koppers Holdings Inc. (the “Company”) filed a Current Report on Form 8-K (the “Original 8-K”) to report, among other things, the election of Andrew D. Sandifer as a member of the Board of Directors (the “Board”) of the... |
| 25 Jun 2018 | 8-K/A: Completion of Acquisition or Disposition of Assets |
| 03 Aug 2017 | 8-K/A: Submission of Matters to a Vote of Security Holders |
| 30 Oct 2014 | 8-K/A: Completion of Acquisition or Disposition of Assets |
| 05 Aug 2011 | 8-K/A: Submission of Matters to a Vote of Security Holders |
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