Scott Szwejbka - Oct 1, 2025 Form 4 Insider Report for WESTLAKE CORP (WLK)

Role
SVP, HIP Segment Head
Signature
Scott Szwejbka by J. Feng, POA
Stock symbol
WLK
Transactions as of
Oct 1, 2025
Transactions value $
-$294,681
Form type
4
Date filed
10/3/2025, 12:20 PM
Previous filing
Apr 14, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Szwejbka Scott Thomas SVP, HIP Segment Head 2801 POST OAK BLVD., SUITE 600, HOUSTON Scott Szwejbka by J. Feng, POA 2025-10-03 0002064540

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction WLK Common Stock Options Exercise $0 +10.8K +186.29% $0.00 16.7K Oct 1, 2025 Direct F1
transaction WLK Common Stock Tax liability -$295K -3.84K -23.06% $76.70 12.8K Oct 2, 2025 Direct F3

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 Options Exercise $0 -10.8K -100% $0.00 0 Oct 1, 2025 Common Stock 10.8K Direct F1, F2
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Restricted stock units ("RSUs") convert into the Issuer's common stock on a one-for-one basis.
F2 On October 1, 2021, the reporting person was granted 10,840 RSUs vesting on the fourth anniversay of the grant date.
F3 Shares otherwise issuable were withheld to satisfy tax obligations arising out of the vesting of the reporting persons RSUs.