Key facts
- This page summarizes Roger A. Cregg's Form 4 filing for WESTLAKE CORP (WLK).
- 2 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 10 Dec 2025, 14:47.
Roger A. Cregg - 10 Dec 2025 Form 4 Insider Report for WESTLAKE CORP (WLK)
- Reporting relationship
- Director
- Issuer ticker
- WLK
- Reported as of
- 10 Dec 2025
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 10 Dec 2025, 14:47:38 UTC
- Prior SEC filing
- 11 Aug 2025
- Next SEC filing
- 03 Feb 2026
- Source filing
- View source filing
- Reporting owner signature
- Roger Cregg by J Feng POA
Source evidence
Original filing metadata and source links for verification.
5 source fields
Reporting owner
1 detail
Key filing fact
Roger A. Cregg filed Form 4 for WESTLAKE CORP (WLK) on 10 Dec 2025.
Change
- Previous filing in this sequence was filed on 11 Aug 2025.
- Current net transaction value: $0.
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 0001231239
Primary reporting owner
CREGG ROGER A
- Relationship
- Director
- Address
- 2801 POST OAK BLVD., SUITE 600, HOUSTON
- Signature
- Roger Cregg by J Feng POA
- Signature date
- 10 Dec 2025
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
WLK
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +1,339
- Change %
- Price
- Shares after
- 1,339
- Date
- 10 Dec 2025
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
WLK
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- $0
- Shares
- -1,339
- Change %
- -100%
- Price
- $0.000000
- Shares after
- 0
- Date
- 10 Dec 2025
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 1,339
- Exercise price
- Footnotes
- F1, F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 2 footnotes
Footnote F1
Restricted stock units convert into the Issuer's common stock on a one-for-one basis.
Footnote F2
On December 10, 2024 the reporting person was granted 1,339 restricted stock units vesting on the first anniversary of the grant date.