Mark A. Mccollum - 08 Aug 2025 Form 4 Insider Report for WESTLAKE CORP (WLK)

Reporting relationship
Director
Issuer ticker
WLK
Reported as of
08 Aug 2025
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
4
Accepted by SEC
11 Aug 2025, 10:16:40 UTC
Prior SEC filing
16 May 2025
Next SEC filing
27 Jan 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
Mark A. McCollum by J Feng POA

Key filing fact

Mark A. Mccollum filed Form 4 for WESTLAKE CORP (WLK) on 11 Aug 2025.

Key facts

  • This page summarizes Mark A. Mccollum's Form 4 filing for WESTLAKE CORP (WLK).
  • 3 reported transactions and 2 derivative rows are listed below.
  • Accepted by SEC: 11 Aug 2025, 10:16.

Change

  • Previous filing in this sequence was filed on 16 May 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

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001215888 Primary reporting owner

MCCOLLUM MARK A

Relationship
Director
Address
2801 POST OAK BLVD., STE. 600, HOUSTON
Signature
Mark A. McCollum by J Feng POA
Signature date
11 Aug 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
+1,128
Change %
+13%
Price
Shares after
9,656
Date
09 Aug 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

Award

Transaction value
$0
Shares
+2,168
Change %
Price
$0.000000
Shares after
2,168
Date
08 Aug 2025
Ownership
Direct
Underlying class
Common Stock
Underlying amount
2,168
Exercise price
Footnotes
F1, F2
WLK transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
$0
Shares
-1,128
Change %
-100%
Price
$0.000000
Shares after
0
Date
09 Aug 2025
Ownership
Direct
Underlying class
Common Stock
Underlying amount
1,128
Exercise price
Footnotes
F1, F3
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

Restricted stock units convert into the Issuer's common stock on a one-for-one basis.

Footnote F2

All of the restricted stock units will vest on August 8, 2026.

Footnote F3

On August 9, 2024 the reporting person was granted 1,128 restricted stock units vesting on the first anniversary of the grant date.

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