Mark Steven Bender is CFO & VP at WESTLAKE CORP (WLK). They have made 41 open-market trades across 2 companies since 2010, most recently 2026-05-13.
CIK 0001330417
3 open-market purchases totalling $318K since 2014, against 38 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WLK | 35,895 | $2.3M |
| WLKP | 13,000 | $272K |
| Total | $2.5M |
Shares reported on the most recent Form 4, priced at the 2026-05-14 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WLK | SELL | 2026-03-27 | 2026-03-30 | $112.54 | $3.7M | +1.4% | -4.5% | -35.9% |
| WLK | SELL | 2026-02-27 | 2026-03-02 | $100.92 | $1.8M | +10.4% | +12.6% | -16.5% |
| WLK | SELL | 2024-05-03 | 2024-05-06 | $152.19 | $1.5M | +0.4% | +1.3% | -13.6% |
| WLK | SELL | 2024-03-06 | 2024-03-07 | $141.02 | $1.4M | +1.7% | +10.2% | +9.1% |
| WLK | SELL | 2024-02-26 | 2024-02-28 | $137.57 | $1.3M | +4.0% | +13.1% | +16.5% |
| WLK | SELL | 2022-03-31 | 2022-04-01 | $124.35 | $1.5M | -2.9% | +1.9% | -21.5% |
| WLK | SELL | 2022-03-30 | 2022-03-31 | $124.91 | $1.1M | -5.9% | +2.3% | -21.3% |
| WLK | SELL | 2022-03-29 | 2022-03-30 | $122.44 | $490K | -7.8% | +1.9% | -20.4% |
| WLK | SELL | 2022-03-25 | 2022-03-28 | $125.34 | $2.0M | -8.3% | +3.8% | -19.9% |
| WLK | SELL | 2022-03-24 | 2022-03-25 | $125.38 | $1.0M | -6.2% | +1.1% | -25.1% |
| WLK | SELL | 2022-03-23 | 2022-03-24 | $125.16 | $1.5M | -2.9% | +2.2% | -23.1% |
| WLK | SELL | 2021-11-11 | 2021-11-15 | $101.57 | $481K | -3.8% | -11.5% | -0.7% |
| WLK | SELL | 2021-11-08 | 2021-11-10 | $100.77 | $127K | -1.6% | -3.8% | +2.8% |
| WLK | SELL | 2021-11-05 | 2021-11-08 | $98.80 | $1.3M | +2.6% | -2.0% | +0.6% |
| WLK | SELL | 2021-03-12 | 2021-03-15 | $94.70 | $3.0M | -3.3% | +3.0% | +9.4% |
| WLK | SELL | 2021-03-09 | 2021-03-10 | $92.27 | $4.8M | -3.1% | -5.5% | +9.5% |
| WLK | SELL | 2020-11-06 | 2020-11-10 | $74.79 | $239K | -3.1% | +10.8% | +13.1% |
| WLK | SELL | 2020-11-05 | 2020-11-06 | $73.98 | $3.7M | -3.3% | +3.8% | +6.8% |
| WLKP | BUY | 2020-03-12 | 2020-03-16 | $14.99 | $30K | +18.8% | +9.3% | +46.6% |
| WLK | SELL | 2018-05-21 | 2018-05-22 | $122.93 | $2.7M | -3.7% | -12.5% | -20.2% |
| WLK | SELL | 2018-05-11 | 2018-05-14 | $117.33 | $5.5M | +3.0% | -3.9% | -16.8% |
| WLKP | BUY | 2018-02-27 | 2018-02-27 | $23.77 | $48K | -4.7% | -5.1% | -1.5% |
| WLK | SELL | 2018-02-26 | 2018-02-27 | $111.69 | $558K | +7.9% | +0.0% | +6.1% |
| WLK | SELL | 2018-02-22 | 2018-02-23 | $110.97 | $444K | +5.6% | +2.5% | +8.0% |
| WLK | SELL | 2018-02-22 | 2018-02-26 | $110.64 | $221K | +3.9% | -3.6% | +5.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.