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WESTLAKE CORP Director's Dealing 2025

Dec 23, 2025

30551_dirs_2025-12-23_6214c6a0-70db-4d02-bf81-e3608c602d3b.zip

Director's Dealing

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SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CORP (WLK)
CIK: 0001262823
Period of Report: 2025-12-22

Reporting Person: Chao Albert (N/A)

Non-Derivative Transactions

Date Security Code Shares Price A/D Holdings After Ownership
2025-12-22 Common Stock M 81673 $44.42 Acquired 668558 Direct
2025-12-22 Common Stock S 9711 $72.818 Disposed 658847 Direct
2025-12-22 Common Stock S 30604 $73.796 Disposed 628243 Direct
2025-12-22 Common Stock S 521 $74.443 Disposed 627722 Direct

Derivative Transactions

Date Security Exercise Price Code Shares A/D Expiration Underlying Ownership
2025-12-22 Employee Option (right to buy) $44.42 M 81673 Disposed 2026-02-18 Common Stock (81673) Direct

Footnotes

F1: A portion of the sale proceeds were used to cover the strike price and related taxes in regards to the excercise of the options disclosed in Table II.

F2: Weighted average price. These shares were sold in multiple transactions ranging from $72.395 to $73.39 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F3: Weighted average price. These shares were sold in multiple transactions ranging from $73.40 to $74.40 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F4: Weighted average price. These shares were sold in multiple transactions ranging from $74.405 to $74.515 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.

F5: The stock options are exercisable in three installments of 33%, 33% and 34% on February 18, 2017, 2018 and 2019, respectively.