WESTLAKE CHEMICAL CORP

Q: Jun 30 2026

Q: Mar 31 2026

FY: Dec 31 2025

Q: Sep 30 2025

Q: Jun 30 2025

Q: Mar 31 2025

FY: Dec 31 2024

Q: Sep 30 2024

Q: Jun 30 2024

Q: Mar 31 2024

FY: Dec 31 2023

Q: Sep 30 2023

Q: Jun 30 2023

Q: Mar 31 2023

FY: Dec 31 2022

Q: Sep 30 2022

Q: Jun 30 2022

Q: Mar 31 2022

FY: Dec 31 2021

Q: Sep 30 2021

Cost Associated with Exit or Disposal Activities

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Results of Operations and Financial Condition

Other Events

Regulation FD Disclosure

Submission of Matters to a Vote of Security Holders

Results of Operations and Financial Condition

Regulation FD Disclosure

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Other Events

Entry into a Material Definitive Agreement

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Results of Operations and Financial Condition

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Regulation FD Disclosure

Cost Associated with Exit or Disposal Activities

Regulation FD Disclosure

Entry into a Material Definitive Agreement

Regulation FD Disclosure

Results of Operations and Financial Condition

Certification of approval for listing and registration on a national securities exchange

Registration of Securities on Exchange

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Registration statement under Securities Act of 1933 to be offered to employees pursuant to certain plans

Automatic Shelf Registration

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Certification of approval for listing and registration on a national securities exchange

Registration of Securities on Exchange

Prospectus Supplement for Primary Offering

Free Writing Prospectus

Prospectus Supplement for Primary Offering

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Shareholder Letter

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Shareholder Letter

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Preliminary Proxy Statement

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Preliminary Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Additional Information for Proxy Statement/ Votes

Definitive Proxy Statement

Darby Tommy

Darby Tommy

Sheets Jeffrey Wayne

Chao David Tsung-Hung

Chao Catherine T.

Graff Michael J

Lubel Kimberly S

MCCOLLUM MARK A

NORTHCUTT R BRUCE

Patel Bhavesh V.

CREGG ROGER A

Sabat Carolyn Chao

Chao Albert

Chao Albert

MCCOLLUM MARK A

Chao Catherine T.

Chao David Tsung-Hung

CREGG ROGER A

Graff Michael J

Lubel Kimberly S

Specialized Disclosure Report

Annual Report Scanned (Paper)

Specialized Disclosure Report

Annual Report Scanned (Paper)

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Specialized Disclosure Report

Annual Report Scanned (Paper)

Specialized Disclosure Report

Annual Report Scanned (Paper)

Specialized Disclosure Report

Letter from the SEC

Correspondence with the SEC

Letter from the SEC

Specialized Disclosure Report

Specialized Disclosure Report

Specialized Disclosure Report

Post-effective amendment to an automatic shelf registration statement

Specialized Disclosure Report