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

Role
Director
Signature
Mark A. McCollum by J Feng POA
Issuer symbol
WLK
Transactions as of
08 Aug 2025
Net transactions value
$0
Form type
4
Filing time
11 Aug 2025, 10:16:40 UTC
Previous filing
16 May 2025
Next filing
27 Jan 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
MCCOLLUM MARK A Director 2801 POST OAK BLVD., STE. 600, HOUSTON Mark A. McCollum by J Feng POA 11 Aug 2025 0001215888

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction WLK Common Stock Options Exercise +1,128 +13% 9,656 09 Aug 2025 Direct F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction WLK Restricted Stock Units Award $0 +2,168 $0.000000 2,168 08 Aug 2025 Common Stock 2,168 Direct F1, F2
transaction WLK Restricted Stock Units Options Exercise $0 -1,128 -100% $0.000000 0 09 Aug 2025 Common Stock 1,128 Direct F1, F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Restricted stock units convert into the Issuer's common stock on a one-for-one basis.
F2 All of the restricted stock units will vest on August 8, 2026.
F3 On August 9, 2024 the reporting person was granted 1,128 restricted stock units vesting on the first anniversary of the grant date.