Koppers Holdings Inc. — All Filings
1,004 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
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 SUBMISSION | 0001209191-23-045195 | Aug 9, 2023 | Aug 7, 2023 |
| 144 | — | 0001959173-23-002955 | Aug 7, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-044459 | Aug 3, 2023 | Aug 1, 2023 |
| 10-Q | 10-Q | 0000950170-23-037727 | Aug 3, 2023 | Jun 30, 2023 |
| 8-K | 8-K | 0000950170-23-038090 | Aug 3, 2023 | Aug 2, 2023 |
| 8-K | 8-K | 0000950170-23-037613 | Aug 3, 2023 | — |
| 144 | — | 0001959173-23-002770 | Aug 1, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-037063 | Jun 14, 2023 | Jun 12, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-037044 | Jun 14, 2023 | Jun 12, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-037049 | Jun 14, 2023 | Jun 12, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-037059 | Jun 14, 2023 | Jun 12, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-036339 | Jun 12, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-035424 | Jun 8, 2023 | Jun 6, 2023 |
| 144 | — | 0001959173-23-001591 | Jun 6, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-033350 | Jun 1, 2023 | May 30, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027996 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027984 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027956 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027962 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027966 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027971 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027975 | May 8, 2023 | May 4, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-027979 | May 8, 2023 | May 4, 2023 |
| 8-K | 8-K | 0000950170-23-018095 | May 5, 2023 | May 4, 2023 |
| 10-Q | 10-Q | 0000950170-23-018172 | May 5, 2023 | Mar 31, 2023 |
| 8-K/A | 8-K/A | 0000950170-23-017934 | May 4, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026303 | May 1, 2023 | Apr 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026298 | May 1, 2023 | Apr 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026330 | May 1, 2023 | Apr 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026286 | May 1, 2023 | Apr 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026290 | May 1, 2023 | Apr 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026293 | May 1, 2023 | Apr 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-026301 | May 1, 2023 | Apr 27, 2023 |
| UPLOAD | — | 0000000000-23-004354 | Apr 28, 2023 | — |
| CORRESP | — | 0000950170-23-014269 | Apr 25, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-024100 | Apr 12, 2023 | Apr 10, 2023 |
| 8-K | 8-K | 0001193125-23-097892 | Apr 11, 2023 | Apr 10, 2023 |
| UPLOAD | — | 0000000000-23-003604 | Apr 11, 2023 | — |
| DEF 14A | DEF 14A | 0001193125-23-089616 | Apr 3, 2023 | — |
| ARS | ARS | 0000950170-23-011615 | Apr 3, 2023 | Dec 31, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-021460 | Mar 29, 2023 | Mar 27, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-021462 | Mar 29, 2023 | Mar 27, 2023 |
| 8-K | 8-K | 0000950170-23-009213 | Mar 22, 2023 | Mar 20, 2023 |
| 3 | FORM 3 SUBMISSION | 0001209191-23-020535 | Mar 22, 2023 | Mar 20, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-020565 | Mar 22, 2023 | Mar 20, 2023 |
| 8-K | 8-K | 0000950170-23-007354 | Mar 10, 2023 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-23-016831 | Mar 7, 2023 | Mar 3, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-016846 | Mar 7, 2023 | Mar 3, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-016861 | Mar 7, 2023 | Mar 3, 2023 |
| 4 | FORM 4 SUBMISSION | 0001209191-23-016870 | Mar 7, 2023 | Mar 3, 2023 |