Chao Albert's Form 4 filing
Westlake Corp (WLK) · filed Aug 11, 2026
- Accession no.
- 0001193125-26-345140
- Filed
- Aug 11, 2026, 5:45 PM ET
- Trade date
- Aug 11, 2026
- Filing delay
- Same day
- Rule 10b5-1 plan
- Not checked
This filing lists 3 non-derivative transactions and 1 derivative transaction. Open-market sales total $3.12M. It was filed on the trade date.
Reporting owners
A Form 4 can have several reporting owners, such as a person and a fund they control. Trade tables show the first one.
| Owner | Relationship to the company |
|---|---|
| Chao AlbertCIK 0001299403 | Director, Officer (Executive Chairman) |
Non-derivative securities (Table I)
Acquisitions and disposals of common stock and similar shares, one row per line on the filing.
| Trade date | Security | Transaction | Shares | Price | Value | Shares after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 11, 2026 | Common Stock | MOption exerciseAcquired | +38,873 | $61.87 | +$2,404,878.15 | 681,753 | Direct | |
| Aug 11, 2026 | Common Stock | SSaleDisposed | −7,489 | $79.70F1 | −$596,873.3 | 674,264 | Direct | |
| Aug 11, 2026 | Common Stock | SSaleDisposed | −31,384 | $80.42F2 | −$2,523,901.28 | 642,880 | Direct |
Derivative securities (Table II)
Options, warrants, restricted stock units and similar. Shares are the underlying shares; price and value are for the derivative itself, and the holding after is in derivative units.
| Trade date | Security | Transaction | Underlying shares | Unit price | Value | Held after | Ownership | Flags |
|---|---|---|---|---|---|---|---|---|
| Aug 11, 2026 | Common Stock | MOption exerciseDisposed | −38,873 | $0.00 | $0 | 38,873 | Direct |
Footnotes and remarks
Livermore keeps the footnotes that transaction prices refer to, all footnotes of amendments (Form 4/A) and the filing's remarks. Other footnotes, such as how indirect holdings are held or the details of a trading plan, are only in the original on SEC EDGAR.
- F1
Weighted average price. These shares were sold in multiple transactions ranging from $79.02 to $80.01 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
Referenced by the price of 1 transaction in Table I.
- F2
Weighted average price. These shares were sold in multiple transactions ranging from $80.10 to $80.86 inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the SEC, upon request, full information regarding the number of shares sold at each separate price within the range set forth above.
Referenced by the price of 1 transaction in Table I.