| Date | Name | Title | Action | No Shares | Price Per Share |
|---|---|---|---|---|---|
Insider Transactions For WLK | |||||
| 2025-10-02 | Szwejbka, Scott Thomas | SVP, HIP Segment Head | Sold | 3842 | $76.70 |
| 2025-10-01 | Szwejbka, Scott Thomas | SVP, HIP Segment Head | Purchased | 10840 | $0.00 |
| 2025-10-01 | Szwejbka, Scott Thomas | SVP, HIP Segment Head | Sold | 10840 | $0.00 |
| 2025-08-28 | Chao, James | Director, Senior Chairman | Sold | 15140 | $0.00 |
| 2025-08-09 | Northcutt, R Bruce | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Graff, Michael J | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Sheets, Jeffrey Wayne | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Lubel, Kimberly S | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Sheets, Jeffrey Wayne | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Sabat, Carolyn Chao | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Lubel, Kimberly S | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Mccollum, Mark A | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Chao, David Tsung-hung | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Chao, Catherine T. | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Mccollum, Mark A | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Northcutt, R Bruce | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Chao, David Tsung-hung | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Sabat, Carolyn Chao | Director | Purchased | 1128 | $0.00 |
| 2025-08-09 | Chao, Catherine T. | Director | Sold | 1128 | $0.00 |
| 2025-08-09 | Graff, Michael J | Director | Sold | 1128 | $0.00 |