Company facts
- Industry
- Industrial Organic Chemicals
- Headquarters
- Houston, Texas
- Most recent report
- 8-K, filed Aug 31, 2026
- Incorporated
- Delaware
- Filings on record
- 1,007+ filings
- On EDGAR
- CIK 1262823
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 47
News 8 of 150
- 8-K Leadership change Aug 31, 2026
- 8-K Quarterly results Aug 4, 2026
- 8-K Other events Jul 29, 2026
- 8-K Current report on a material event Jun 15, 2026
- 8-K Shareholder vote results May 18, 2026
- 8-K Quarterly results May 5, 2026
- 8-K Current report on a material event May 1, 2026
- 8-K Leadership change Apr 20, 2026
Prospectuses and Registrations 8 of 22
- 424B5 Prospectus supplement for an offering Nov 5, 2025
- FWP Free writing prospectus Nov 4, 2025
- 424B5 Prospectus supplement for an offering Nov 4, 2025
- S-3ASR Automatic shelf registration Oct 31, 2025
- S-8 Registration statement for an employee plan May 11, 2023
- S-3ASR Automatic shelf registration Nov 3, 2022
- 424B5 Prospectus supplement for an offering Aug 6, 2021
- FWP Free writing prospectus Aug 5, 2021
Proxies 8 of 30
- DEFA14A Extra proxy material Apr 2, 2026
- DEF 14A Proxy statement for a shareholder vote Apr 2, 2026
- DEFA14A Extra proxy material Mar 28, 2025
- DEF 14A Proxy statement for a shareholder vote Mar 28, 2025
- PX14A6G Shareholder's own proxy material Apr 11, 2024
- DEFA14A Extra proxy material Mar 29, 2024
- DEF 14A Proxy statement for a shareholder vote Mar 29, 2024
- PX14A6G Shareholder's own proxy material Apr 20, 2023
Ownership 8 of 690
- 4 Insider reported a trade Sep 1, 2026
- 3 Insider reported their initial holding Aug 31, 2026
- 4 Insider reported a trade Aug 17, 2026
- 4 Insider reported a trade Aug 17, 2026
- 4 Insider reported a trade Aug 17, 2026
- 4 Insider reported a trade Aug 17, 2026
- 4 Insider reported a trade Aug 17, 2026
- 4 Insider reported a trade Aug 17, 2026
Other 8 of 68
- CERT Exchange certified a listing Aug 21, 2026
- 8-A12B Registration of a security for exchange listing Aug 21, 2026
- SD Conflict minerals disclosure May 18, 2026
- ARS Annual report sent to shareholders Apr 2, 2026
- SD Conflict minerals disclosure May 23, 2025
- ARS Annual report sent to shareholders Mar 28, 2025
- UPLOAD Comment letter from SEC staff Sep 6, 2024
- CORRESP Reply to SEC staff Aug 22, 2024
Everything here comes from Westlake Corp's own filings on SEC EDGAR. The filing list is rechecked every hour.