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 |
|---|---|---|---|---|
| SC 13G/A | — | 0001082327-22-000027 | Feb 8, 2022 | — |
| SC 13G/A | — | 0000834237-22-003221 | Jan 28, 2022 | — |
| 5 | FORM 5 SUBMISSION | 0001209191-22-004843 | Jan 25, 2022 | Dec 31, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002539 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002534 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002542 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002522 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002526 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002531 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002528 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002537 | Jan 7, 2022 | Jan 5, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002131 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002126 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002113 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002123 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002117 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002121 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-002129 | Jan 6, 2022 | Jan 4, 2022 |
| 4 | FORM 4 SUBMISSION | 0001209191-22-000403 | Jan 4, 2022 | Dec 31, 2021 |
| 3 | FORM 3 SUBMISSION | 0001209191-22-000179 | Jan 3, 2022 | Jan 1, 2022 |
| 8-K | 8-K | 0001564590-21-059338 | Dec 3, 2021 | Dec 1, 2021 |
| 8-K | 8-K | 0001564590-21-054271 | Nov 4, 2021 | — |
| 10-Q | 10-Q | 0001564590-21-054369 | Nov 4, 2021 | Sep 30, 2021 |
| 8-K | 8-K | 0001564590-21-041927 | Aug 6, 2021 | — |
| 8-K | 8-K | 0001564590-21-041928 | Aug 6, 2021 | — |
| S-8 | S-8 | 0001193125-21-238318 | Aug 6, 2021 | — |
| 10-Q | 10-Q | 0001564590-21-042020 | Aug 6, 2021 | Jun 30, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-033445 | May 18, 2021 | May 17, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-032266 | May 13, 2021 | May 11, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030857 | May 7, 2021 | May 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030848 | May 7, 2021 | May 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030852 | May 7, 2021 | May 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030854 | May 7, 2021 | May 6, 2021 |
| S-8 | S-8 | 0001193125-21-154308 | May 7, 2021 | — |
| 8-K | 8-K | 0001564590-21-025361 | May 7, 2021 | May 6, 2021 |
| S-8 | S-8 | 0001193125-21-154311 | May 7, 2021 | — |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030842 | May 7, 2021 | May 6, 2021 |
| 10-Q | 10-Q | 0001564590-21-025405 | May 7, 2021 | Mar 31, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030846 | May 7, 2021 | May 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-030850 | May 7, 2021 | May 6, 2021 |
| DEFA14A | DEFA14A | 0001193125-21-120961 | Apr 19, 2021 | — |
| DEFA14A | DEFA14A | 0001193125-21-120964 | Apr 19, 2021 | — |
| DEF 14A | NOTICE & PROXY STATEMENT | 0001193125-21-106380 | Apr 5, 2021 | May 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-018983 | Mar 9, 2021 | Mar 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-018948 | Mar 9, 2021 | Mar 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-018960 | Mar 9, 2021 | Mar 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-018990 | Mar 9, 2021 | Mar 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-019000 | Mar 9, 2021 | Mar 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-018968 | Mar 9, 2021 | Mar 6, 2021 |
| 4 | FORM 4 SUBMISSION | 0001209191-21-018974 | Mar 9, 2021 | Mar 6, 2021 |