WESTLAKE CORP (WLK) has 257 open-market insider trades by 26 insiders since 2004. Over the last six months insiders net sold $3.1M. The most active filer is Mark Steven Bender, CFO & VP.
| Name | Title | Tier | Trades | Value | Last Trade |
|---|---|---|---|---|---|
| Ttwfgp LLC | 10% Owner | — | 11 | $269.0M | 2020-03-27 |
| TTWF L.P. | 10% | — | 1 | $165.9M | 2006-05-02 |
| Albert Chao | Chairman | — | 32 | $103.4M | 2026-08-11 |
| James Chao | Chairman | — | 22 | $60.2M | 2026-02-20 |
| Mark Steven Bender | CFOVP | — | 38 | $59.5M | 2026-05-13 |
| Robert F. Buesinger | VP | — | 26 | $23.2M | 2026-03-27 |
| George J. Mangieri | CAOVP | — | 29 | $14.0M | 2020-02-18 |
| Lawrence E. Teel | CEOVP | — | 7 | $11.8M | 2021-02-25 |
| Andrew Kenner | VP | — | 9 | $9.6M | 2022-02-18 |
| David R. Hansen | Sr VP Adminstration | — | 13 | $7.6M | 2015-02-18 |
| Insider | Title | Type | Value | Date |
|---|---|---|---|---|
| Albert Chao | Chairman | Sell | $3.1M | 2026-08-11 |
| Mark Steven Bender | CFO & VP | Sell | $3.7M | 2026-03-27 |
| Robert F. Buesinger | VP | Sell | $461K | 2026-03-27 |
| Mark Steven Bender | CFO & VP | Sell | $1.8M | 2026-02-27 |
| Albert Chao | Chairman | Sell | $6.0M | 2025-12-22 |
| Robert F. Buesinger | EVP & PEM Segment Head | Sell | $6K |
Companies that share insiders with WLK, and sector peers with recent insider buying. Related by who files, not by how the stocks move.
| 2025-05-27 |
| Robert F. Buesinger | EVP & PEM Segment Head | Buy | $8K | 2025-04-22 |
| David Tsung-Hung Chao | Director | Sell | $452K | 2024-11-29 |
| David Tsung-Hung Chao | Director | Sell | $228K | 2024-11-22 |
| Robert F. Buesinger | VP | Sell | $555K | 2024-05-09 |
| Mark Steven Bender | CFO & VP | Sell | $1.5M | 2024-05-03 |
| Robert F. Buesinger | VP | Sell | $560K | 2024-03-15 |
| Robert F. Buesinger | EVP & HIP +1 | Sell | $18K | 2024-03-13 |
| Mark Steven Bender | CFO & VP | Sell | $1.4M | 2024-03-06 |
| Mark Steven Bender | CFO & VP | Sell | $1.3M | 2024-02-26 |