Mark Steven Bender sold $1.8M of WLK
EVP & CFO at WESTLAKE CORP. 16,413 shares at an average of $112.54, traded Mar 27, 2026, filed Mar 30, 2026.
Score components
- +22RoleCFO
- +25Trade size$1.8M at market
- +10Share of holdings soldSold 37% of holdings
- +8Cluster2 insiders selling within 14 days
What happened after comparable sells
Same side and tier, against the S&P 500, at 1, 3 and 6 months. Shown to Pro users; the whole table is on the backtest page.
This signal so far: 1m -4.0%, 3m -35.2%, 6m -41.6%.
Price around the trade, and since
From a quarter before the trade to today. The arrow is the trade, the circle the day the filing reached EDGAR, which is the first day anyone outside could act; the dotted line is the S&P 500 rebased to that day's close.
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value; the dashed line is the close on the filing day, the dotted line SPY rebased to it.Charts by TradingView Lightweight Charts™
Rows in this filing
Every transaction in Form 4 0001193125-26-131706, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Mar 27, 2026 | SOpen-market sale Common Stock | -16,413 | $112.54 | $1.8M | 28,015 | Mar 30, 2026 |
Related signals
Other insiders at WESTLAKE CORP and this insider’s other filings.
| Score | Company | Insider | Value | Holdings | Filed |
|---|---|---|---|---|---|
| 30Weak | WLKsell WESTLAKE CORP | Albert Chao Executive Chairman | $3.1M 38,873 shares | -6% | |
| 45Moderate | WESTLAKE CORP | Robert F. Buesinger EVP, PEM Segment Head | $461k 4,000 shares | -10% | |
| 42Moderate | WLKsell WESTLAKE CORP | Mark Steven Bender EVP & CFO | $1.8M 17,409 shares | -28% | |
| 30Weak | WLKsell WESTLAKE CORP | Albert Chao Executive Chairman | $3.0M 40,836 shares | -6% | |
| 31Weak | WLKbuy WESTLAKE CORP | Robert F. Buesinger EVP, PEM Segment Head | $7,751 83 shares | - | |
| 35Weak | WLKsell WESTLAKE CORP | Robert F. Buesinger EVP, PEM Segment Head | $6,034 83 shares | -100% | |
| 33Weak | WLKsell WESTLAKE CORP | David Tsung-Hung Chao director | $226k 1,750 shares | -18% | |
| 33Weak | WLKsell WESTLAKE CORP | David Tsung-Hung Chao director | $228k 1,750 shares | -16% | |
| 47Moderate | WESTLAKE CORP | Robert F. Buesinger EVP, HIP, IT & Digital | $555k 3,500 shares | -17% | |
| 57Moderate | WESTLAKE CORP | Mark Steven Bender EVP & CFO | $753k 4,950 shares | -11% |
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.