Westlake Corp. planned insider sales
In the twelve months since 9 October 2025 insiders at Westlake Corp. filed 5 Form 144 notices of planned sales, 130,224 shares worth $11.4 million at the time of filing, from 3 sellers. The latest, filed 11 August 2026: Albert Y Chao (officer, director), 38,873 shares worth $3.1 million, planned for around 11 August 2026 through Morgan Stanley Smith Barney LLC Executive Financial Services.
| Filed | Seller | Relationship | Shares | Value | Planned sale | Broker | How acquired | Filing |
|---|---|---|---|---|---|---|---|---|
| 11 August 2026 | Albert Y Chao | Officer, Director | 38,873 | $3.1 million | 11 August 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | Stock Option Exercise | Form 144 |
| 30 March 2026 | Robert Buesinger | Officer | 4,000 | $461,000 | 30 March 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | Performance Shares; Restricted Stock | Form 144 |
| 27 March 2026 | Mark Bender | Officer | 16,413 | $1.8 million | 27 March 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | Performance Shares; Restricted Stock | Form 144 |
| 27 February 2026 | Mark Bender | Officer | 30,102 | $3.0 million | 27 February 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | Restricted Stock; Stock Option Exercise | Form 144 |
| 22 December 2025 | Albert Y Chao | Officer, Director | 40,836 | $3.0 million | 22 December 2025 | Morgan Stanley Smith Barney LLC Executive Financial Services | Stock Option Exercise | Form 144 |
A Form 144 is the notice an insider files with the SEC before selling restricted or control shares over the Rule 144 thresholds; it says what may be sold, not what was.
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Value is the filer's own aggregate market value. Whether the sale happened shows up later on Form 4, on the insiders page.Source
Form 144 filings on EDGAR for Westlake Corp.: the company's filing index, each notice read from its own XML.
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