Company · WLK
Westlake Corporation
Name as listed on its exchange; filed with the SEC as WESTLAKE CORP.
Nasdaq's symbol directory lists WLK on the New York Stock Exchange as “Westlake Corporation Common Stock”.
In the 12 months to Nov 8, 2026: insiders sold on 1 occasion ($3.1M); 2 company reports (Form 8-K, since May 26, 2026).
All insider filings at the SEC · Appeared in No. 13
Insider trades · SEC Form 4
Those inside the hall
Open-market purchases and sales only. Legs one person filed for one day are combined.
Who traded
- Albert Chao, Executive Chairman sold $3.1M
Every trade (1)
- SELLAlbert Chao, Executive Chairman sold $3.1M
Company reports · SEC Form 8-K
In its own words
Current reports the company filed with the SEC; most items are due within four business days of the event. Each line lists the report's items by the SEC's own titles; the filing says what happened. Reports collected since May 26, 2026; every 8-K at the SEC.
- Results of operations and financial condition; Regulation FD disclosure Nov 4, 2026
- Costs associated with exit or disposal activities; Regulation FD disclosure Sep 29, 2026
Sources: SEC EDGAR (Forms 4, 144 and 8-K) and STOCK Act periodic transaction reports. Filings can be late, amended or wrong at the source; see methodology.