| 2020-03-27 | Westlake Corporation WLK | 10 percent owner | 160,000 0.1254% | $39.08 | $6.25M | +67.81% | ||
| 2020-03-26 | Westlake Corporation WLK | 10 percent owner | 145,000 0.1143% | $41.00 | $5.95M | +60.8% | ||
| 2020-03-25 | Westlake Corporation WLK | 10 percent owner | 130,000 0.1013% | $40.77 | $5.3M | +59.43% | ||
| 2020-03-24 | Westlake Corporation WLK | 10 percent owner | 145,000 0.1096% | $36.53 | $5.3M | +71.94% | ||
| 2020-03-19 | Westlake Corporation WLK | 10 percent owner | 165,000 0.1304% | $37.66 | $6.21M | +70.7% | ||
| 2020-03-18 | Westlake Corporation WLK | 10 percent owner | 165,000 0.1226% | $31.41 | $5.18M | +91.97% | ||
| 2020-03-17 | Westlake Corporation WLK | 10 percent owner | 165,000 0.1312% | $33.25 | $5.49M | +93.9% | ||
| 2020-03-16 | Westlake Corporation WLK | 10 percent owner | 160,000 0.1312% | $31.42 | $5.03M | +110.97% | ||
| 2020-03-13 | Westlake Corporation WLK | 10 percent owner | 160,000 0.1212% | $32.94 | $5.27M | +85.67% | ||
| 2019-03-29 | Westlake Chemical Partners LP WLKP | 10 percent owner | 1.4M 4.0633% | $21.40 | $30M | +5.06% | ||
| 2006-05-02 | Sale | Westlake Corporation WLK | 10 percent owner | 11M 16.1239% | $30.16 | $331.72M | -2.16% |