L. Benjamin Ederington - 19 Feb 2026 Form 4 Insider Report for WESTLAKE CORP (WLK)

Reporting relationship: EVP, Legal & External Affairs
Issuer ticker: WLK
Reported as of: 19 Feb 2026
Net transaction value: -$33,594
SEC form: 4
Accepted by SEC: 23 Feb 2026, 14:44:36 UTC
Prior SEC filing: 19 Feb 2026
Source filing: View source filing
Reporting owner signature: L. Benjamin Ederington by J. Feng, POA

Key filing fact

L. Benjamin Ederington filed Form 4 for WESTLAKE CORP (WLK) on 23 Feb 2026.

Key facts

This page summarizes L. Benjamin Ederington's Form 4 filing for WESTLAKE CORP (WLK).
4 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 23 Feb 2026, 14:44.

Change

Previous filing in this sequence was filed on 19 Feb 2026.
Current net transaction value: -$33,594.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001588279 Primary reporting owner

Ederington L. Benjamin

Relationship: EVP, Legal & External Affairs
Address: 2801 POST OAK BLVD., STE. 600, HOUSTON
Signature: L. Benjamin Ederington by J. Feng, POA
Signature date: 23 Feb 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

WLK transaction

Common Stock

Award

Transaction value: $0
Shares: +1,425
Change %: +1.8%
Price: $0.000000
Shares after: 80,515
Date: 19 Feb 2026
Ownership: Direct
Footnotes: F1

WLK transaction

Common Stock

Tax liability

Transaction value: $33,594
Shares: -357
Change %: -0.44%
Price: $94.10
Shares after: 80,158
Date: 20 Feb 2026
Ownership: Direct
Footnotes: F2, F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

WLK transaction Derivative

Employee Option (right to buy)

Award

Transaction value: $0
Shares: +25,656
Change %
Price: $0.000000
Shares after: 25,656
Date: 20 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 25,656
Exercise price: $94.48
Footnotes: F4

WLK transaction Derivative

Restricted Stock Units

Award

Transaction value: $0
Shares: +7,002
Change %
Price: $0.000000
Shares after: 7,002
Date: 20 Feb 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,002
Exercise price
Footnotes: F5, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote 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.

Footnote F2

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

Footnote F3

Weighted average price. These shares were sold in multiple transactions at prices ranging from $94.10 to 94.38, 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.

Footnote F4

The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively.

Footnote F5

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

Footnote F6

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