| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For WLK | |||||
| 2026-03-27 | Buesinger, Robert F. | EVP, PEM Segment Head | Sold | 4000 | $115.25 |
| 2026-03-27 | Bender, Mark Steven | EVP & CFO | Sold | 16413 | $112.54 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Sold | 16988 | $100.91 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Sold | 12693 | $98.20 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Purchased | 6494 | $86.54 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Purchased | 6199 | $65.81 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Sold | 6199 | $0.00 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Sold | 6494 | $0.00 |
| 2026-02-27 | Bender, Mark Steven | EVP & CFO | Sold | 421 | $101.52 |
| 2026-02-20 | Ederington, L. Benjamin | EVP, Legal & External Affairs | Purchased | 25656 | $0.00 |
| 2026-02-20 | Gilson, Jean-marc | President and CEO | Purchased | 29784 | $0.00 |
| 2026-02-20 | Chao, Albert | Director, Executive Chairman | Purchased | 14945 | $0.00 |
| 2026-02-20 | Holy, Jeffrey Adam | VP and CAO | Sold | 81 | $94.10 |
| 2026-02-20 | Holy, Jeffrey Adam | VP and CAO | Purchased | 4394 | $0.00 |
| 2026-02-20 | Holy, Jeffrey Adam | VP and CAO | Purchased | 1199 | $0.00 |
| 2026-02-20 | Holy, Jeffrey Adam | VP and CAO | Purchased | 2540 | $0.00 |
| 2026-02-20 | Patel, Bhavesh V. | Director | Purchased | 1852 | $0.00 |
| 2026-02-20 | Chao, John Tsung-chen | Director | Purchased | 2434 | $0.00 |
| 2026-02-20 | Chao, John Tsung-chen | Director | Purchased | 1104 | $0.00 |
| 2026-02-20 | Chao, John Tsung-chen | Director | Purchased | 4044 | $0.00 |