Albert Chao sold $3.0M of WLK
Executive Chairman at WESTLAKE CORP. 40,836 shares at an average of $73.57, traded Dec 22, 2025, filed Dec 23, 2025.
Score components
- +20RoleChair
- +25Trade size$3.0M at market
- 0Share of holdings soldSold 6.1% of holdings
- 0ClusterNo other insider selling within 14 days
- -15Exercise and sellShares came from an option exercise in the same filing
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 +18.4%, 3m +56.4%, 6m +5.5%.
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 0001193125-25-329926, as filed. Open on EDGAR
| Date | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|
| Dec 22, 2025 | MOption exercise Common Stock | +81,673 | $44.42 | $3.6M | 668,558 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Common Stock | -9,711 | $72.82 | $707k | 658,847 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Common Stock | -30,604 | $73.80 | $2.3M | 628,243 | Dec 23, 2025 |
| Dec 22, 2025 | SOpen-market sale Common Stock | -521 | $74.44 | $39k | 627,722 | Dec 23, 2025 |
| Dec 22, 2025 | MOption exercise Employee Option (right to buy)derivative | -81,673 | $0.00 | $0 | 0 | Dec 23, 2025 |
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% | |
| 65Notable | WESTLAKE CORP | Mark Steven Bender EVP & CFO | $1.8M 16,413 shares | -37% | |
| 42Moderate | WLKsell WESTLAKE CORP | Mark Steven Bender EVP & CFO | $1.8M 17,409 shares | -28% | |
| 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.