Koppers Holdings Inc. (KOP) SEC Filings

Koppers Holdings Inc. (KOP) SEC EDGAR filings (8-K, 10-Q, 8-K/A, DEF 14A, 10-K), newest first; latest 8-K filed 2026-08-06. Every filing links to the canonical SEC document. First-party data.

SEC filings — source: EDGAR

Filed	Form	Title
2026-08-06	8-K	8-K filed 2026-08-06 by Koppers Holdings Inc.
2026-08-06	10-Q	10-Q filed 2026-08-06 by Koppers Holdings Inc.
2026-05-11	8-K	8-K filed 2026-05-11 by Koppers Holdings Inc.
2026-05-08	8-K	8-K filed 2026-05-08 by Koppers Holdings Inc.
2026-05-08	10-Q	10-Q filed 2026-05-08 by Koppers Holdings Inc.
2026-05-07	8-K/A	8-K/A filed 2026-05-07 by Koppers Holdings Inc.
2026-03-27	DEF 14A	DEF 14A filed 2026-03-27 by Koppers Holdings Inc.
2026-03-18	8-K/A	8-K/A filed 2026-03-18 by Koppers Holdings Inc.
2026-02-26	8-K	8-K filed 2026-02-26 by Koppers Holdings Inc.
2026-02-26	10-K	10-K filed 2026-02-26 by Koppers Holdings Inc.
2026-01-09	8-K	8-K filed 2026-01-09 by Koppers Holdings Inc.
2025-12-03	8-K/A	8-K/A filed 2025-12-03 by Koppers Holdings Inc.
2025-11-07	10-Q	10-Q filed 2025-11-07 by Koppers Holdings Inc.
2025-11-07	8-K	8-K filed 2025-11-07 by Koppers Holdings Inc.
2025-11-05	8-K	8-K filed 2025-11-05 by Koppers Holdings Inc.
2025-08-08	8-K	8-K filed 2025-08-08 by Koppers Holdings Inc.
2025-08-08	10-Q	10-Q filed 2025-08-08 by Koppers Holdings Inc.
2025-06-18	8-K	8-K filed 2025-06-18 by Koppers Holdings Inc.
2025-05-29	8-K	8-K filed 2025-05-29 by Koppers Holdings Inc.
2025-05-09	8-K	8-K filed 2025-05-09 by Koppers Holdings Inc.
2025-05-09	10-Q	10-Q filed 2025-05-09 by Koppers Holdings Inc.
2025-03-28	DEF 14A	DEF 14A filed 2025-03-28 by Koppers Holdings Inc.
2025-02-27	10-K	10-K filed 2025-02-27 by Koppers Holdings Inc.
2025-02-27	8-K	8-K filed 2025-02-27 by Koppers Holdings Inc.
2024-12-17	8-K	8-K filed 2024-12-17 by Koppers Holdings Inc.
2024-12-09	8-K	8-K filed 2024-12-09 by Koppers Holdings Inc.
2024-12-05	8-K	8-K filed 2024-12-05 by Koppers Holdings Inc.
2024-11-08	8-K	8-K filed 2024-11-08 by Koppers Holdings Inc.
2024-11-08	10-Q	10-Q filed 2024-11-08 by Koppers Holdings Inc.
2024-08-08	8-K	8-K filed 2024-08-08 by Koppers Holdings Inc.

KOP overview · KOP earnings · KOP financials · KOP KPIs · KOP investor relations · KOP ownership · KOP peers

Data sourced from U.S. SEC EDGAR. Not personalized investment advice.