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Year archive

Koppers Holdings Inc. — 2025 filings

All 81 regulatory filings released by Koppers Holdings Inc. (KOP) in 2025, sourced directly from the official regulator.

81 Filings
2025 Period
2025 filings (81)
Filing Released Lang
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
FORM 4
Director's Dealing
2025-12-17 English
8-K
Regulatory Filings
2025-12-03 English
FORM 4
Director's Dealing
2025-11-07 English
FORM 3
Director's Dealing
2025-11-07 English
10-Q
Interim / Quarterly Report Q3 2025
2025-11-07 English
8-K
Regulatory Filings
2025-11-07 English
8-K
Regulatory Filings
2025-11-05 English
Major Shareholding Notification 2025
Major Shareholding Notification
2025-10-31 English
FORM 4
Director's Dealing
2025-09-17 English
FORM 4
Director's Dealing
2025-09-17 English
FORM 4
Director's Dealing
2025-09-17 English
FORM 4
Director's Dealing
2025-09-17 English
4
Director's Dealing
2025-08-18 English
Regulatory Filings 2025
Regulatory Filings
2025-08-15 English
Regulatory Filings 2025
Regulatory Filings
2025-08-11 English
10-Q
Interim / Quarterly Report Q2 2025
2025-08-08 English
8-K
Regulatory Filings
2025-08-08 English
4
Director's Dealing
2025-06-20 English
8-K
Regulatory Filings
2025-06-18 English
4
Director's Dealing
2025-06-16 English
8-K
Regulatory Filings
2025-05-29 English
4
Director's Dealing
2025-05-22 English
4
Director's Dealing
2025-05-09 English
4
Director's Dealing
2025-05-09 English
4
Director's Dealing
2025-05-09 English
4
Director's Dealing
2025-05-09 English
4
Director's Dealing
2025-05-09 English
4
Director's Dealing
2025-05-09 English
4
Director's Dealing
2025-05-09 English
10-Q
Interim / Quarterly Report Q1 2025
2025-05-09 English
8-K
Regulatory Filings
2025-05-09 English
S-8
Regulatory Filings
2025-05-09 English
4
Director's Dealing
2025-05-06 English
4
Director's Dealing
2025-05-06 English
4
Director's Dealing
2025-05-06 English
4
Director's Dealing
2025-05-06 English
4
Director's Dealing
2025-05-06 English
Major Shareholding Notification 2025
Major Shareholding Notification
2025-04-30 English
Major Shareholding Notification 2025
Major Shareholding Notification
2025-04-28 English
Major Shareholding Notification 2025
Major Shareholding Notification
2025-04-23 English
4
Director's Dealing
2025-04-14 English
DEFA14A
Regulatory Filings
2025-04-11 English
ARS
Annual Report
2025-03-28 English
DEF 14A
Proxy Solicitation & Information Statement
2025-03-28 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-26 English
4
Director's Dealing
2025-03-20 English
Regulatory Filings 2025
Regulatory Filings
2025-03-19 English
4/A
Director's Dealing
2025-03-11 English
10-K
Annual Report FY 2024
2025-02-27 English
8-K
Regulatory Filings
2025-02-27 English
3
Director's Dealing
2025-02-24 English
4
Director's Dealing
2025-02-24 English
Major Shareholding Notification 2025
Major Shareholding Notification
2025-02-05 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English
4
Director's Dealing
2025-01-07 English