WESTLAKE CORP — All Filings
1,007 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.
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10-K
10-Q
144
3
3/A
4
4/A
424B4
424B5
425
8-A12B
8-K
8-K/A
ARS
CERT
CORRESP
DEF 14A
DEFA14A
DEFC14A
DFAN14A
DFRN14A
EFFECT
FWP
POS AM
POSASR
PRE 14A
PREC14A
PRRN14A
PX14A6G
S-1
S-1/A
S-3
S-3/A
S-3ASR
S-4
S-4/A
S-8
SC 13G
SC 13G/A
SC TO-C
SD
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | 4 | 0001447712-25-000007 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001974878-25-000004 | Aug 11, 2025 | Aug 8, 2025 |
| 10-Q | 10-Q | 0001262823-25-000052 | Aug 6, 2025 | Jun 30, 2025 |
| 8-K | 8-K | 0001262823-25-000047 | Aug 5, 2025 | — |
| 8-K | 8-K | 0001262823-25-000043 | Jun 17, 2025 | — |
| 4 | 4 | 0000950170-25-083572 | Jun 9, 2025 | Apr 22, 2025 |
| SD | SD | 0001262823-25-000039 | May 23, 2025 | — |
| 8-K | 8-K | 0001262823-25-000033 | May 12, 2025 | May 8, 2025 |
| 8-K | 8-K | 0001262823-25-000026 | May 2, 2025 | — |
| 10-Q | 10-Q | 0001262823-25-000029 | May 2, 2025 | Mar 31, 2025 |
| 8-K | 8-K | 0001262823-25-000020 | Apr 16, 2025 | Apr 11, 2025 |
| 4 | 4 | 0000950170-25-054370 | Apr 15, 2025 | Apr 11, 2025 |
| 4 | 4 | 0000950170-25-054371 | Apr 15, 2025 | Apr 11, 2025 |
| 3 | 3 | 0000950170-25-053819 | Apr 14, 2025 | Apr 11, 2025 |
| DEF 14A | DEF 14A | 0001193125-25-066316 | Mar 28, 2025 | May 8, 2025 |
| ARS | ARS | 0001193125-25-066323 | Mar 28, 2025 | Dec 31, 2024 |
| DEFA14A | DEFA14A | 0001193125-25-066319 | Mar 28, 2025 | — |
| 4/A | 4/A | 0000950170-25-035137 | Mar 7, 2025 | Mar 5, 2025 |
| 4/A | 4/A | 0000950170-25-034210 | Mar 6, 2025 | Mar 5, 2025 |
| 8-K | 8-K | 0001262823-25-000015 | Mar 4, 2025 | Feb 28, 2025 |
| 4 | 4 | 0000950170-25-032487 | Mar 4, 2025 | Feb 28, 2025 |
| 10-K | 10-K | 0001262823-25-000011 | Feb 25, 2025 | Dec 31, 2024 |
| 4 | 4 | 0000950170-25-025475 | Feb 24, 2025 | Feb 20, 2025 |
| 8-K | 8-K | 0001262823-25-000005 | Feb 24, 2025 | — |
| 4 | 4 | 0000950170-25-025478 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025479 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025486 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025477 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025487 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025489 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025490 | Feb 24, 2025 | Feb 20, 2025 |
| 4 | 4 | 0000950170-25-025491 | Feb 24, 2025 | Feb 21, 2025 |
| 4 | 4 | 0000950170-25-024015 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024013 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024025 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024028 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024029 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024032 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024037 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-024009 | Feb 20, 2025 | Feb 18, 2025 |
| 4 | 4 | 0000950170-25-022789 | Feb 19, 2025 | Feb 14, 2025 |
| 4 | 4 | 0000950170-25-022790 | Feb 19, 2025 | Feb 14, 2025 |
| 8-K | 8-K | 0001193125-24-274528 | Dec 11, 2024 | Dec 10, 2024 |
| 4 | 4 | 0000950170-24-135098 | Dec 10, 2024 | — |
| 3 | 3 | 0000950170-24-135096 | Dec 10, 2024 | — |
| 4 | 4 | 0000950170-24-131969 | Dec 2, 2024 | Nov 29, 2024 |
| 144 | — | 0001972362-24-001743 | Nov 26, 2024 | — |
| 4 | 4 | 0000950170-24-130429 | Nov 25, 2024 | Nov 22, 2024 |
| 144 | — | 0001972362-24-001709 | Nov 21, 2024 | — |
| 10-Q | 10-Q | 0001262823-24-000053 | Nov 6, 2024 | Sep 30, 2024 |