SEC Form 4 · accession 0001193125-26-341997
WESTLAKE CORP · WLK
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
David Tsung-Hung Chao
Director
Period of report
Aug 8, 2026
Accepted (ET)
Aug 10, 2026 · 1:50 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001262823
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF1 | Aug 8, 2026 | M | 2,168 | — | A | 11,080 | D | |
| Common StockF2 | holding | — | — | — | 19,423 | I | by Trust |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF1,F3 | — | Aug 8, 2026 | M | 2,168 | D | — | — | Common Stock | 2,168 | 2,168 | D |
Explanation of responses
- F1Restricted stock units convert into the Issuer's common stock on a one-for-one basis.
- F2These shares are held in a trust for the benefit of the reporting person, who also serves as sole trustee.
- F3On August 8, 2025 the reporting person was granted 2,168 restricted stock units vesting on the first anniversary of the grant date.