WESTLAKE CORP — Director's Dealing 2026

Feb 23, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: WESTLAKE CORP (WLK)
CIK: 0001262823
Period of Report: 2026-02-19

Reporting Person: Bender Mark Steven (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-19	Common Stock	A	1777	—	Acquired	62287	Direct
2026-02-20	Common Stock	F	445	$94.099	Disposed	61842	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-20	Employee Option (right to buy)	$94.48	A	28389	Acquired	2036-02-20	Common Stock (28389)	Direct
2026-02-20	Restricted Stock Units	$	A	7747	Acquired		Common Stock (7747)	Direct

Footnotes

F1: Represents shares of common stock that vested on February 19, 2026, upon the determination by the Compensation Committee of the Issuer's Board of Directors of the satisfaction of performance criteria underlying an award of performance stock units ("PSUs") granted to the Reporting Person on February 17, 2023, under the terms of the Issuer's 2013 Omnibus Incentive Plan.

F2: Shares otherwise issuable were witheld to satisfy tax obligations arising out of vesting of the Reporting Person's PSUs.

F3: Weighted average price. These shares were sold in multiple transactions at prices ranging from $93.98 to $94.10, 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: The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively.

F5: Each restricted stock unit ("RSU") represents a contingent right to recieve one share of the Issuer's common stock.

F6: All of the RSUs will vest on February 20, 2029.