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
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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 |
|---|---|---|---|---|
| 144 | — | 0001950047-26-003039 | Mar 27, 2026 | — |
| 4/A | 4/A | 0001193125-26-096289 | Mar 6, 2026 | Feb 16, 2022 |
| 4 | 4 | 0001193125-26-084672 | Mar 2, 2026 | Feb 27, 2026 |
| 144 | — | 0001950047-26-001885 | Feb 27, 2026 | — |
| 10-K | 10-K | 0001262823-26-000016 | Feb 26, 2026 | Dec 31, 2025 |
| 8-K | 8-K | 0001262823-26-000008 | Feb 24, 2026 | — |
| 4 | 4 | 0001193125-26-065177 | Feb 24, 2026 | Feb 20, 2026 |
| 3 | 3 | 0001193125-26-064648 | Feb 23, 2026 | Feb 20, 2026 |
| 8-K | 8-K | 0001193125-26-064221 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063707 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063705 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063701 | Feb 23, 2026 | Feb 20, 2026 |
| 4 | 4 | 0001193125-26-063700 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063688 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063686 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063669 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063663 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-063659 | Feb 23, 2026 | Feb 19, 2026 |
| 4 | 4 | 0001193125-26-059219 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059217 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059215 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059213 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059212 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059211 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059210 | Feb 19, 2026 | Feb 17, 2026 |
| 4 | 4 | 0001193125-26-059207 | Feb 19, 2026 | Feb 17, 2026 |
| 8-K | 8-K | 0001262823-26-000005 | Jan 6, 2026 | — |
| 4 | 4 | 0001193125-25-329926 | Dec 23, 2025 | Dec 22, 2025 |
| 144 | — | 0001950047-25-010631 | Dec 22, 2025 | — |
| 8-K | 8-K | 0001193125-25-318445 | Dec 15, 2025 | Dec 12, 2025 |
| 4 | 4 | 0001193125-25-314045 | Dec 10, 2025 | — |
| 8-K | 8-K | 0001193125-25-275790 | Nov 12, 2025 | Nov 10, 2025 |
| 8-K | 8-K | 0001193125-25-267207 | Nov 5, 2025 | Nov 4, 2025 |
| 424B5 | 424B5 | 0001193125-25-267197 | Nov 5, 2025 | — |
| FWP | FWP | 0001193125-25-264936 | Nov 4, 2025 | — |
| 8-K | 8-K | 0001193125-25-263753 | Nov 4, 2025 | — |
| 424B5 | 424B5 | 0001193125-25-263703 | Nov 4, 2025 | — |
| S-3ASR | S-3ASR | 0001193125-25-260927 | Oct 31, 2025 | — |
| 10-Q | 10-Q | 0001262823-25-000064 | Oct 31, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001262823-25-000061 | Oct 30, 2025 | — |
| 4 | 4 | 0001193125-25-229590 | Oct 3, 2025 | Oct 1, 2025 |
| 4 | 4 | 0001299505-25-000007 | Aug 29, 2025 | Aug 28, 2025 |
| 8-K | 8-K | 0001262823-25-000056 | Aug 26, 2025 | — |
| 4 | 4 | 0001457009-25-000004 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001974884-25-000004 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001726418-25-000004 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001307964-25-000004 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001974878-25-000004 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001215888-25-000005 | Aug 11, 2025 | Aug 8, 2025 |
| 4 | 4 | 0001448219-25-000004 | Aug 11, 2025 | Aug 8, 2025 |