WLK insider trading — Westlake Corp
Over the last 90 days, insiders at Westlake Corp (WLK) made 0 open-market purchases worth $0 and 1 open-market sale worth $3.12M, making them net sellers by $3.12M. The largest sale was by Chao Albert (Executive Chairman), who sold 38,873 shares for $3.12M on Aug 11, 2026.
Updated Oct 16, 2026.
Recent WLK insider transactions
Every Form 4 filed by Westlake Corp officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Aug 11, 2026 | Chao Albert | Executive Chairman | M · Option exercise | Direct | 38,873 | $61.87 | $2.40M | Form 4 |
| Aug 11, 2026 | Chao Albert | Executive Chairman | S · Sale | Direct | 38,873 | $80.28 | $3.12M | Form 4 |
| Aug 8, 2026 | Sheets Jeffrey Wayne | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Sabat Carolyn Chao | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Northcutt R Bruce | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Mccollum Mark A | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Lubel Kimberly S | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Cregg Roger A | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Graff Michael J | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Chao David Tsung-Hung | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
| Aug 8, 2026 | Chao Catherine T. | Director | M · Option exercise | Direct | 2,168 | — | — | Form 4 |
WLK insider trading FAQ
Are insiders buying WLK stock?
Not on the open market. In the last 90 days, Westlake Corp insiders made no open-market purchases, and 1 open-market sale totaling $3.12M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading WLK?
Recent sellers: Chao Albert.
Where does WLK insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.