Company · CIK 1262823 # WESTLAKE CORP | CIK | [1262823](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001262823) (SEC EDGAR) | | --- | --- | | Industry (SIC) | 2860 — Industrial Organic Chemicals | | Incorporated in | DE | | Business address | TX | | Listed | WLK (NYSE) | | First annual or quarterly report | 2004-03-26 | ## Offerings 9 registrations | Registration | Label and status | First filed | Last event | Filings | | --- | --- | --- | --- | --- | | 333-291208 | Shelf Effective | 2025-10-31 | 2025-11-05 | 3 | | 333-268137 | Shelf Effective | 2022-11-03 | 2022-11-03 | 1 | | 333-234573 | Shelf Effective | 2019-11-07 | 2021-08-06 | 5 | | 333-213548 | Shelf Effective | 2016-09-08 | 2019-07-12 | 5 | | 333-191064 | Shelf Effective | 2013-09-09 | 2013-09-09 | 1 | | 333-177119 | Shelf Effective | 2011-09-30 | 2012-07-11 | 3 | | 333-124581 | Shelf Effective | 2005-05-03 | 2008-06-12 | 6 | | 333-150206 | Shelf Effective | 2008-04-11 | 2008-04-22 | 2 | | 333-115790 | Registered company Final prospectus | 2004-05-24 | 2004-08-11 | 6 | ## Filings 34 | Filed | Filing | Registration | Accession | | --- | --- | --- | --- | | 2025-11-05 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312525267197/0001193125-25-267197-index.htm) Shelf takedown | 333-291208 | 0001193125-25-267197 | | 2025-11-04 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312525263703/0001193125-25-263703-index.htm) Shelf takedown | 333-291208 | 0001193125-25-263703 | | 2025-10-31 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1262823/000119312525260927/0001193125-25-260927-index.htm) Shelf registered | 333-291208 | 0001193125-25-260927 | | 2022-11-03 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1262823/000119312522276959/0001193125-22-276959-index.htm) Shelf registered | 333-268137 | 0001193125-22-276959 | | 2021-08-06 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312521239427/0001193125-21-239427-index.htm) Shelf takedown | 333-234573 | 0001193125-21-239427 | | 2021-08-05 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312521237105/0001193125-21-237105-index.htm) Shelf takedown | 333-234573 | 0001193125-21-237105 | | 2020-06-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312520165790/0001193125-20-165790-index.htm) Shelf takedown | 333-234573 | 0001193125-20-165790 | | 2020-06-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312520164273/0001193125-20-164273-index.htm) Shelf takedown | 333-234573 | 0001193125-20-164273 | | 2019-11-07 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1262823/000119312519287396/0001193125-19-287396-index.htm) Shelf registered | 333-234573 | 0001193125-19-287396 | | 2019-07-12 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312519192520/0001193125-19-192520-index.htm) Shelf takedown | 333-213548 | 0001193125-19-192520 | | 2019-07-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312519191510/0001193125-19-191510-index.htm) Shelf takedown | 333-213548 | 0001193125-19-191510 | | 2017-11-14 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312517342725/0001193125-17-342725-index.htm) Shelf takedown | 333-213548 | 0001193125-17-342725 | | 2017-11-13 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312517340023/0001193125-17-340023-index.htm) Shelf takedown | 333-213548 | 0001193125-17-340023 | | 2017-03-27 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1262823/999999999517000669/9999999995-17-000669-index.htm) Declared effective | 333-216662 | 9999999995-17-000669 | | 2017-03-27 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312517097560/0001193125-17-097560-index.htm) Shelf takedown | 333-216662 | 0001193125-17-097560 | | 2016-09-08 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1262823/000119312516705501/0001193125-16-705501-index.htm) Shelf registered | 333-213548 | 0001193125-16-705501 | | 2013-09-09 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1262823/000119312513361476/0001193125-13-361476-index.htm) Shelf registered | 333-191064 | 0001193125-13-361476 | | 2012-07-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312512299959/0001193125-12-299959-index.htm) Shelf takedown | 333-177119 | 0001193125-12-299959 | | 2012-07-10 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312512298259/0001193125-12-298259-index.htm) Shelf takedown | 333-177119 | 0001193125-12-298259 | | 2011-09-30 | [S-3ASR](https://www.sec.gov/Archives/edgar/data/1262823/000119312511261513/0001193125-11-261513-index.htm) Shelf registered | 333-177119 | 0001193125-11-261513 | | 2008-06-12 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1262823/999999999508001876/9999999995-08-001876-index.htm) Declared effective | 333-124581 | 9999999995-08-001876 | | 2008-04-22 | [EFFECT](https://www.sec.gov/Archives/edgar/data/1262823/999999999508001157/9999999995-08-001157-index.htm) Declared effective | 333-150206 | 9999999995-08-001157 | | 2008-04-11 | [S-3](https://www.sec.gov/Archives/edgar/data/1262823/000119312508079956/0001193125-08-079956-index.htm) Shelf registered | 333-150206 | 0001193125-08-079956 | | 2006-04-27 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312506091178/0001193125-06-091178-index.htm) Shelf takedown | 333-124581 | 0001193125-06-091178 | | 2006-04-20 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312506083766/0001193125-06-083766-index.htm) Shelf takedown | 333-124581 | 0001193125-06-083766 | | 2006-01-11 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312506004887/0001193125-06-004887-index.htm) Shelf takedown | 333-124581 | 0001193125-06-004887 | | 2006-01-09 | [424B5](https://www.sec.gov/Archives/edgar/data/1262823/000119312506003204/0001193125-06-003204-index.htm) Shelf takedown | 333-124581 | 0001193125-06-003204 | | 2005-05-03 | [S-3](https://www.sec.gov/Archives/edgar/data/1262823/000119312505093915/0001193125-05-093915-index.htm) Shelf registered | 333-124581 | 0001193125-05-093915 | | 2004-08-11 | [424B4](https://www.sec.gov/Archives/edgar/data/1262823/000095012904005946/0000950129-04-005946-index.htm) Final prospectus | 333-115790 | 0000950129-04-005946 | | 2004-08-09 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1262823/000095012904005754/0000950129-04-005754-index.htm) Amendment | 333-115790 | 0000950129-04-005754 | | 2004-07-27 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1262823/000095012904005156/0000950129-04-005156-index.htm) Amendment | 333-115790 | 0000950129-04-005156 | | 2004-07-19 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1262823/000095012904004943/0000950129-04-004943-index.htm) Amendment | 333-115790 | 0000950129-04-004943 | | 2004-07-02 | [S-1/A](https://www.sec.gov/Archives/edgar/data/1262823/000095012904004610/0000950129-04-004610-index.htm) Amendment | 333-115790 | 0000950129-04-004610 | | 2004-05-24 | [S-1](https://www.sec.gov/Archives/edgar/data/1262823/000095012904003564/0000950129-04-003564-index.htm) Registration filed | 333-115790 | 0000950129-04-003564 | [All filings of this company](https://equitycapital.markets/filings?cik=1262823) · [CSV](https://equitycapital.markets/filings.csv?cik=1262823) --- Source page: https://equitycapital.markets/company/1262823 · Data: U.S. SEC EDGAR · CC BY 4.0