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Koppers Holdings Inc.
KOP
·
NYSE
·
$41.54
Share Price as of 11/2
·
$799M
Market Cap as of 11/2
Categorized
Chronological
Ownership
Credit
Contracts
Plans
Incorporation
Transcripts
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Financials
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10-Q
Q2 ended 06/30/26
08/06/26
10-Q
Q1 ended 03/31/26
05/08/26
10-K
FY 2025
02/26/26
10-Q
Q3 ended 09/30/25
11/07/25
10-Q
Q2 ended 06/30/25
08/08/25
Disclosures
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8-K
Current report
08/06/26
8-K
Current report
05/11/26
8-K
Current report
05/08/26
8-K/A
Current report (amended)
05/07/26
8-K/A
Current report (amended)
03/18/26
Prospectuses and Registrations
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S-8
Registration of securities for employees
05/08/26
S-8
Registration of securities for employees
05/09/25
S-8
Registration of securities for employees
08/06/21
S-8
Registration of securities for employees
05/07/21
S-8
Registration of securities for employees
05/07/21
Proxies
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DEF 14A
Definitive proxy
03/27/26
DEFA14A
Additional proxy materials
04/11/25
DEF 14A
Definitive proxy
03/28/25
DEF 14A
Definitive proxy
04/02/24
PRE 14A
Preliminary proxy
03/08/24
Ownership
Filter
SC 13D/A
Beneficial ownership (amended)
10/22/26
SC 13G/A
Beneficial ownership (amended)
10/19/26
SC 13G/A
Beneficial ownership (amended)
10/08/26
Form 4
Insider transaction
09/15/26
Form 4
Insider transaction
09/15/26
Other
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ARS
Annual report to shareholders
03/27/26
ARS
Annual report to shareholders
03/28/25
ARS
Annual report to shareholders
04/02/24
UPLOAD
Letter from the SEC
04/28/23
CORRESP
Correspondence with the SEC
04/25/23
Latest Filings
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10-Q
Q2 ended 06/30/26
08/06/26
8-K
Current report
08/06/26
8-K
Current report
05/11/26
10-Q
Q1 ended 03/31/26
05/08/26
8-K
Current report
05/08/26
Ownership
Filter
SC 13D/A
Beneficial ownership (amended)
10/22/26
SC 13G/A
Beneficial ownership (amended)
10/19/26
SC 13G/A
Beneficial ownership (amended)
10/08/26
Form 4
Insider transaction
09/15/26
Form 4
Insider transaction
09/15/26