Insider · CIK 0001330417
Mark Steven Bender
cfoofficer
Files at WLK (WESTLAKE CORP). First filing Mar 2, 2026, latest Mar 30, 2026.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
0 / 2
$0 bought, $3.6M sold
Where the trades landed
Last year at the company this insider has traded most, with each buy and sell on the bar it happened.
WLK: WESTLAKE CORP
WLKOct 9, 2026 · close 62.29
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 65Notable | WESTLAKE CORP | $1.8M 16,413 shares | -37% | +104% from low-1% from high | |
| 42Moderate | WLKsell WESTLAKE CORP | $1.8M 17,409 shares | -28% | +89% from low-4% from high |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Mar 27, 2026 | WLK WESTLAKE CORP | SOpen-market sale Common Stock | -16,413 | $112.54 | $1.8M | 28,015 | Mar 30, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | MOption exercise Common Stock | +6,199 | $65.81 | $408k | 68,041 | Mar 2, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | MOption exercise Common Stock | +6,494 | $86.54 | $562k | 74,535 | Mar 2, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | DDisposition to issuer Common Stock | -12,693 | $98.20 | $1.2M | 61,842 | Mar 2, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | SOpen-market sale Common Stock | -16,988 | $100.91 | $1.7M | 44,854 | Mar 2, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | SOpen-market sale Common Stock | -421 | $101.52 | $43k | 44,433 | Mar 2, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | MOption exercise Employee Option (right to buy)derivative | -6,199 | $0.00 | $0 | 0 | Mar 2, 2026 |
| Feb 27, 2026 | WLK WESTLAKE CORP | MOption exercise Employee Option (right to buy)derivative | -6,494 | $0.00 | $0 | 0 | Mar 2, 2026 |
| Feb 19, 2026 | WLK WESTLAKE CORP | AGrant or award Common Stock | +1,777 | $0.00 | $0 | 62,287 | Feb 23, 2026 |
| Feb 20, 2026 | WLK WESTLAKE CORP | FTax withholding Common Stock | -445 | $94.10 | $42k | 61,842 | Feb 23, 2026 |
| Feb 20, 2026 | WLK WESTLAKE CORP | AGrant or award Employee Option (right to buy)derivative | +28,389 | $0.00 | $0 | 28,389 | Feb 23, 2026 |
| Feb 20, 2026 | WLK WESTLAKE CORP | AGrant or award Restricted Stock Unitsderivative | +7,747 | $0.00 | $0 | 7,747 | Feb 23, 2026 |
| Feb 17, 2026 | WLK WESTLAKE CORP | MOption exercise Common Stock | +4,751 | $0.00 | $0 | 61,719 | Feb 19, 2026 |
| Feb 18, 2026 | WLK WESTLAKE CORP | FTax withholding Common Stock | -1,209 | $98.95 | $120k | 60,510 | Feb 19, 2026 |
| Feb 17, 2026 | WLK WESTLAKE CORP | MOption exercise Restricted Stock Unitsderivative | -4,751 | $0.00 | $0 | 0 | Feb 19, 2026 |
| Feb 20, 2025 | WLK WESTLAKE CORP | AGrant or award Common Stock | +8,819 | $0.00 | $0 | 60,498 | Feb 24, 2025 |
| Feb 21, 2025 | WLK WESTLAKE CORP | FTax withholding Common Stock | -3,530 | $110.54 | $390k | 56,968 | Feb 24, 2025 |
| Feb 21, 2025 | WLK WESTLAKE CORP | AGrant or award Employee Option (right to buy)derivative | +19,279 | $0.00 | $0 | 19,279 | Feb 24, 2025 |
| Feb 21, 2025 | WLK WESTLAKE CORP | AGrant or award Restricted Stock Unitsderivative | +6,391 | $0.00 | $0 | 6,391 | Feb 24, 2025 |
| Feb 18, 2025 | WLK WESTLAKE CORP | MOption exercise Common Stock | +13,987 | $0.00 | $0 | 56,125 | Feb 20, 2025 |
| Feb 19, 2025 | WLK WESTLAKE CORP | FTax withholding Common Stock | -4,264 | $111.46 | $475k | 51,861 | Feb 20, 2025 |
| Feb 19, 2025 | WLK WESTLAKE CORP | FTax withholding Common Stock | -50 | $112.46 | $5,623 | 51,811 | Feb 20, 2025 |
| Feb 19, 2025 | WLK WESTLAKE CORP | FTax withholding Common Stock | -132 | $112.76 | $15k | 51,679 | Feb 20, 2025 |
| Feb 18, 2025 | WLK WESTLAKE CORP | MOption exercise Restricted Stock Unitsderivative | -13,987 | $0.00 | $0 | 0 | Feb 20, 2025 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.