Koppers Holdings Inc. — 4 Filings
1,237 4 filings on record
This page lists all 4 filings submitted to the SEC by Koppers Holdings Inc. (KOP), sorted by most recent first. Each row links to the full filing on EdgarLookup. Koppers Holdings Inc. has filed 1,237 4 documents with the SEC since 2015. To view all SEC filings by Koppers Holdings Inc., see the full filings list.
All
10-K
10-K/A
10-Q
144
144/A
3
3/A
4
4/A
424B1
424B3
5
5/A
8-A12B
8-K
8-K/A
ARS
CERTNYS
CORRESP
DEF 14A
DEFA14A
EFFECT
POS AM
POSASR
PRE 14A
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
SC 13G
SC 13G/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | FORM 4 | 0001564614-26-000002 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001315257-26-000022 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001190210-26-000002 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0002092070-26-000002 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001533627-26-000002 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001315257-26-000024 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001739998-26-000002 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001584601-26-000004 | Mar 25, 2026 | Mar 23, 2026 |
| 4 | FORM 4 | 0001229771-26-000008 | Mar 18, 2026 | Mar 17, 2026 |
| 4 | FORM 4 | 0001229771-26-000006 | Mar 4, 2026 | Mar 2, 2026 |
| 4 | FORM 4 | 0002057699-26-000004 | Mar 2, 2026 | Feb 26, 2026 |
| 4 | FORM 4 | 0001450800-26-000004 | Mar 2, 2026 | Feb 26, 2026 |
| 4 | FORM 4 | 0001315257-26-000014 | Mar 2, 2026 | Feb 26, 2026 |
| 4 | FORM 4 | 0001919175-26-000004 | Mar 2, 2026 | Feb 26, 2002 |
| 4 | FORM 4 | 0001776180-26-000004 | Mar 2, 2026 | Feb 26, 2026 |
| 4 | FORM 4 | 0001229771-26-000004 | Mar 2, 2026 | Feb 26, 2026 |
| 4 | FORM 4 | 0001229771-26-000002 | Feb 19, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0001315257-26-000006 | Feb 12, 2026 | Feb 10, 2026 |
| 4 | FORM 4 | 0001806249-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0001450800-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0001776180-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0001315257-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0002057699-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0001919175-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0001684691-26-000002 | Jan 6, 2026 | Jan 2, 2026 |
| 4 | FORM 4 | 0001919175-25-000003 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0002057699-25-000003 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001450800-25-000004 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001806249-25-000003 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001776180-25-000003 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001684691-25-000005 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001315257-25-000015 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001229771-25-000003 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001463649-25-000005 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001739998-25-000007 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0001584601-25-000006 | Dec 17, 2025 | Dec 16, 2025 |
| 4 | FORM 4 | 0002092070-25-000004 | Nov 7, 2025 | Nov 5, 2025 |
| 4 | FORM 4 | 0001739998-25-000005 | Sep 17, 2025 | Sep 15, 2025 |
| 4 | FORM 4 | 0001463649-25-000003 | Sep 17, 2025 | Sep 15, 2025 |
| 4 | FORM 4 | 0001584601-25-000004 | Sep 17, 2025 | Sep 15, 2025 |
| 4 | FORM 4 | 0001315257-25-000003 | Sep 17, 2025 | Sep 15, 2025 |
| 4 | 4 | 0000950170-25-109748 | Aug 18, 2025 | Aug 15, 2025 |
| 4 | 4 | 0000950170-25-088507 | Jun 20, 2025 | Jun 18, 2025 |
| 4 | 4 | 0000950170-25-086751 | Jun 16, 2025 | Jun 13, 2025 |
| 4 | 4 | 0000950170-25-076330 | May 22, 2025 | May 21, 2025 |
| 4 | 4 | 0000950170-25-068027 | May 9, 2025 | May 8, 2025 |
| 4 | 4 | 0000950170-25-068034 | May 9, 2025 | May 8, 2025 |
| 4 | 4 | 0000950170-25-068045 | May 9, 2025 | May 8, 2025 |
| 4 | 4 | 0000950170-25-068056 | May 9, 2025 | May 8, 2025 |
| 4 | 4 | 0000950170-25-068060 | May 9, 2025 | May 8, 2025 |