Westlake Chemical Corp
Headquarters Houston, TX
Financials
Prospectuses and Registrations
FORMNAMEDATE FILED
424B5Prospectus11/5/2025FWPFiling under Securities Act Rules 163/433 of free writing prospectuses11/4/2025424B5Prospectus11/4/2025S-3ASRAutomatic shelf registration statement of securities of well-known seasoned issuers10/31/2025S-8Securities to be offered to employees in employee benefit plans5/11/2023S-3ASRAutomatic shelf registration statement of securities of well-known seasoned issuers11/3/2022424B5Prospectus8/6/2021
Proxies
FORMNAMEDATE FILED
DEFA14AAdditional definitive proxy soliciting materials and Rule 14(a)(12) material3/28/2025DEF 14AOther definitive proxy statements3/28/2025PX14A6GNotice of exempt solicitation submitted by non-management4/11/2024DEFA14AAdditional definitive proxy soliciting materials and Rule 14(a)(12) material3/29/2024DEF 14AOther definitive proxy statements3/29/2024PX14A6GNotice of exempt solicitation submitted by non-management4/20/2023DEFA14AAdditional definitive proxy soliciting materials and Rule 14(a)(12) material3/31/2023
News
FORMNAMEDATE FILED
8-KEntry into a Material Definitive Agreement11/5/20258-KRegulation FD Disclosure11/4/20258-KResults of Operations and Financial Condition10/30/20258-KRegulation FD Disclosure8/26/20258-KResults of Operations and Financial Condition8/5/20258-KCost Associated with Exit or Disposal Activities6/17/20258-KSubmission of Matters to a Vote of Security Holders5/12/2025
Ownership