SEC Form 4 · accession 0001193125-26-353628
WESTLAKE CORP · WLK
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Mark A McCollum
Director
Period of report
Aug 14, 2026
Accepted (ET)
Aug 17, 2026 · 12:27 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001262823
Table I — non-derivative securities
No Table I lines on this filing.
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,F2 | — | Aug 14, 2026 | A | 2,184 | A | — | — | Common Stock | 2,184 | 2,184 | D |
Explanation of responses
- F1Restricted stock units convert into the Issuer's common stock on a one-for-one basis.
- F2All of the restricted stock units will vest on August 14, 2027.