Key facts
- This page summarizes Scott Thomas Szwejbka's Form 4 filing for WESTLAKE CORP (WLK).
- 4 reported transactions and 2 derivative rows are listed below.
- Accepted by SEC: 23 Feb 2026, 14:45.
Scott Thomas Szwejbka - 19 Feb 2026 Form 4 Insider Report for WESTLAKE CORP (WLK)
- Reporting relationship
- SVP, HIP Segment Head
- Issuer ticker
- WLK
- Reported as of
- 19 Feb 2026
- Net transaction value
- -$8,563
- SEC form
- 4
- Accepted by SEC
- 23 Feb 2026, 14:45:33 UTC
- Prior SEC filing
- 19 Feb 2026
- Source filing
- View source filing
- Reporting owner signature
- Scott T. Szwejbka by J. Feng, POA
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Scott Thomas Szwejbka filed Form 4 for WESTLAKE CORP (WLK) on 23 Feb 2026.
Change
- Previous filing in this sequence was filed on 19 Feb 2026.
- Current net transaction value: -$8,563.
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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0002064540
Primary reporting owner
Szwejbka Scott Thomas
- Relationship
- SVP, HIP Segment Head
- Address
- 2801 POST OAK BLVD., SUITE 600, HOUSTON
- Signature
- Scott T. Szwejbka 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
- +365
- Change %
- +2.7%
- Price
- $0.000000
- Shares after
- 13,864
- Date
- 19 Feb 2026
- Ownership
- Direct
- Footnotes
- F1
WLK
transaction
Common Stock
Tax liability
- Transaction value
- $8,563
- Shares
- -91
- Change %
- -0.66%
- Price
- $94.10
- Shares after
- 13,773
- Date
- 20 Feb 2026
- Ownership
- Direct
- Footnotes
- F2
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
- +14,595
- Change %
- Price
- $0.000000
- Shares after
- 14,595
- Date
- 20 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 14,595
- Exercise price
- $94.48
- Footnotes
- F3
WLK
transaction
Derivative
Restricted Stock Units
Award
- Transaction value
- $0
- Shares
- +3,983
- Change %
- Price
- $0.000000
- Shares after
- 3,983
- Date
- 20 Feb 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 3,983
- Exercise price
- Footnotes
- F4, F5
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 5 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
The stock options are excercisable in three installments of 33%, 33% and 34% on February 20, 2027, 2028 and 2029, respectively.
Footnote F4
Each restricted stock unit ("RSU") represents a contingent right to recieve one share of the Issuer's common stock.
Footnote F5
All of the RSUs will vest on February 20, 2029.