17 insiders reported 76 Form 4 transactions for WESTLAKE CORP (WLK) over the past 18 months (most recent 2026-08-11). Recent activity: Chao Albert (Executive Chairman) Buy 38,873 shares, Chao Albert (Executive Chairman) Sell 7,489 shares, Chao Albert (Executive Chairman) Sell 31,384 shares, CREGG ROGER A (Director) Buy 2,168 shares, NORTHCUTT R BRUCE (Director) Buy 2,168 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-08-11 | Chao Albert | Executive Chairman | Buy | 38,873 | $2.4M |
| 2026-08-11 | Chao Albert | Executive Chairman | Sell | 7,489 | $596,873 |
| 2026-08-11 | Chao Albert | Executive Chairman | Sell | 31,384 | $2.5M |
| 2026-08-10 | CREGG ROGER A | Director | Buy | 2,168 | $0 |
| 2026-08-10 | NORTHCUTT R BRUCE | Director | Buy | 2,168 | $0 |
| 2026-08-10 | Sheets Jeffrey Wayne | Director | Buy | 2,168 | $0 |
| 2026-08-10 | Lubel Kimberly S | Director | Buy | 2,168 | $0 |
| 2026-08-10 | Graff Michael J | Director | Buy | 2,168 | $0 |
| 2026-08-10 | Chao David Tsung-Hung | Director | Buy | 2,168 | $0 |
| 2026-08-10 | Sabat Carolyn Chao | Director | Buy | 2,168 | $0 |
| 2026-08-10 | Chao Catherine T. | Director | Buy | 2,168 | $0 |
| 2026-08-10 | MCCOLLUM MARK A | Director | Buy | 2,168 | $0 |
| 2026-05-14 | Bender Mark Steven | EVP & CFO | Buy | 13,164 | $0 |
| 2026-05-14 | Bender Mark Steven | EVP & CFO | Sell | 5,284 | $514,345 |
| 2026-03-31 | Buesinger Robert F. | EVP, PEM Segment Head | Sell | 4,000 | $461,000 |
| 2026-03-30 | Bender Mark Steven | EVP & CFO | Sell | 16,413 | $1.8M |
| 2026-03-06 | Bender Mark Steven | EVP & CFO | Sell | 1,171 | $122,908 |
| 2026-03-02 | Bender Mark Steven | EVP & CFO | Buy | 6,199 | $407,956 |
| 2026-03-02 | Bender Mark Steven | EVP & CFO | Buy | 6,494 | $561,991 |
| 2026-03-02 | Bender Mark Steven | EVP & CFO | Sell | 12,693 | $1.2M |
| 2026-03-02 | Bender Mark Steven | EVP & CFO | Sell | 16,988 | $1.7M |
| 2026-03-02 | Bender Mark Steven | EVP & CFO | Sell | 421 | $42,740 |
| 2026-02-23 | Chao James | Senior Chairman | Buy | 3,884 | $0 |
| 2026-02-23 | Holy Jeffrey Adam | VP and CAO | Buy | 264 | $0 |
| 2026-02-23 | Holy Jeffrey Adam | VP and CAO | Sell | 81 | $7,622 |
Source: SEC Form 4 filings · as of 2026-08-11