NYSE · CIK 0001262823
WLK WESTLAKE CORP
Insider trading from SEC Form 4. Last filing 41 d ago. Close $62.29 on Oct 9, 2026, +13% from the 52-week low and -49% from the high.
Last 90 days
Net insider value
$0
no open-market trades
Buys
0
$0 by 0 insiders
Sells
0
$0 by 0 insiders
Insiders on file
20
with a Form 4 at this company
Price and insider trades, last year
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
Open-market buys and sells at WESTLAKE CORP, scored.
| Score | Insider | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 30Weak | Albert Chao Executive Chairman sell | $3.0M 40,836 shares | -6% | +33% from low-36% from high | |
| 31Weak | Robert F. Buesinger EVP, PEM Segment Head buy | $7,751 83 shares | - | +12% from low-37% from high | |
| 35Weak | Robert F. Buesinger EVP, PEM Segment Head sell | $6,034 83 shares | -100% | +2% from low-51% from high | |
| 33Weak | David Tsung-Hung Chao director sell | $226k 1,750 shares | -18% | - | |
| 33Weak | David Tsung-Hung Chao director sell | $228k 1,750 shares | -16% | - |
Transactions
The last 100 rows filed, every code.
| Date | Insider | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 31, 2026 | Tommy Darby VP and CAO | AGrant or award Restricted Stock Unitsderivative | +1,791 | $0.00 | $0 | 1,791 | 41 d ago |
| Dec 22, 2025 | Albert Chao Executive Chairman | MOption exercise Common Stock | +81,673 | $44.42 | $3.6M | 668,558 | Dec 23, 2025 |
| Dec 22, 2025 | Albert Chao Executive Chairman | SOpen-market sale Common Stock | -9,711 | $72.82 | $707k | 658,847 | Dec 23, 2025 |
| Dec 22, 2025 | Albert Chao Executive Chairman | SOpen-market sale Common Stock | -30,604 | $73.80 | $2.3M | 628,243 | Dec 23, 2025 |
| Dec 22, 2025 | Albert Chao Executive Chairman | SOpen-market sale Common Stock | -521 | $74.44 | $39k | 627,722 | Dec 23, 2025 |
| Dec 22, 2025 | Albert Chao Executive Chairman | MOption exercise Employee Option (right to buy)derivative | -81,673 | $0.00 | $0 | 0 | Dec 23, 2025 |
| Dec 10, 2025 | Roger A Cregg director | MOption exercise Common Stock | +1,339 | - | - | 1,339 | Dec 10, 2025 |
| Dec 10, 2025 | Roger A Cregg director | MOption exercise Restricted Stock Unitsderivative | -1,339 | $0.00 | $0 | 0 | Dec 10, 2025 |
| Aug 28, 2025 | James Chao Senior Chairman | GGift Common Stock | -15,140 | $0.00 | $0 | 39,741 | Aug 29, 2025 |
| Aug 9, 2025 | Jeffrey Wayne Sheets director | MOption exercise Common Stock | +1,128 | - | - | 12,759 | Aug 11, 2025 |
| Aug 9, 2025 | Mark A McCollum director | MOption exercise Common Stock | +1,128 | - | - | 9,656 | Aug 11, 2025 |
| Aug 9, 2025 | Catherine T. Chao director | MOption exercise Common Stock | +1,128 | - | - | 5,580 | Aug 11, 2025 |
| Aug 9, 2025 | Carolyn Chao Sabat director | MOption exercise Common Stock | +1,128 | - | - | 3,580 | Aug 11, 2025 |
| Aug 9, 2025 | David Tsung-Hung Chao director | MOption exercise Common Stock | +1,128 | - | - | 8,912 | Aug 11, 2025 |
| Aug 8, 2025 | Roger A Cregg director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 9, 2025 | R Bruce Northcutt director | MOption exercise Common Stock | +1,128 | - | - | 21,183 | Aug 11, 2025 |
| Aug 9, 2025 | Kimberly S Lubel director | MOption exercise Common Stock | +1,128 | - | - | 11,653 | Aug 11, 2025 |
| Aug 9, 2025 | Michael J Graff director | MOption exercise Common Stock | +1,128 | - | - | 21,142 | Aug 11, 2025 |
| Aug 8, 2025 | Michael J Graff director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 8, 2025 | Kimberly S Lubel director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 8, 2025 | Carolyn Chao Sabat director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 8, 2025 | Jeffrey Wayne Sheets director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 8, 2025 | R Bruce Northcutt director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 8, 2025 | Mark A McCollum director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 9, 2025 | Mark A McCollum director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 9, 2025 | Carolyn Chao Sabat director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 9, 2025 | R Bruce Northcutt director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 8, 2025 | Catherine T. Chao director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 8, 2025 | David Tsung-Hung Chao director | AGrant or award Restricted Stock Unitsderivative | +2,168 | $0.00 | $0 | 2,168 | Aug 11, 2025 |
| Aug 9, 2025 | Jeffrey Wayne Sheets director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 9, 2025 | Michael J Graff director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 9, 2025 | Kimberly S Lubel director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 9, 2025 | Catherine T. Chao director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Aug 9, 2025 | David Tsung-Hung Chao director | MOption exercise Restricted Stock Unitsderivative | -1,128 | $0.00 | $0 | 0 | Aug 11, 2025 |
| Apr 22, 2025 | Robert F. Buesinger EVP, PEM Segment Head | POpen-market purchase Common Stockindirect: by trust | +83 | $93.39 | $7,751 | 83 | Jun 9, 2025 |
| May 27, 2025 | Robert F. Buesinger EVP, PEM Segment Head | SOpen-market sale Common Stockindirect: by trust | -83 | $72.70 | $6,034 | 0 | Jun 9, 2025 |
| Apr 11, 2025 | Robert F. Buesinger EVP, PEM | AGrant or award Restricted Stock Unitsderivative | +17,101 | $0.00 | $0 | 17,101 | Apr 15, 2025 |
| Apr 11, 2025 | Scott Thomas Szwejbka SVP, HIP | AGrant or award Restricted Stock Unitsderivative | +8,551 | $0.00 | $0 | 8,551 | Apr 15, 2025 |
| Feb 28, 2025 | Jean-Marc Gilson President and CEO | AGrant or award Restricted Stock Unitsderivative | +8,994 | $0.00 | $0 | 8,994 | Mar 4, 2025 |
| Feb 20, 2025 | Mark Steven Bender EVP & CFO | AGrant or award Common Stock | +8,819 | $0.00 | $0 | 60,498 | Feb 24, 2025 |
| Feb 20, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | AGrant or award Common Stock | +6,839 | $0.00 | $0 | 37,670 | Feb 24, 2025 |
| Feb 20, 2025 | Albert Chao Executive Chairman | AGrant or award Common Stock | +33,456 | $0.00 | $0 | 600,275 | Feb 24, 2025 |
| Feb 20, 2025 | John Tsung-chen Chao director | AGrant or award Common Stock | +955 | $0.00 | $0 | 7,664 | Feb 24, 2025 |
| Feb 20, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | AGrant or award Common Stock | +7,305 | $0.00 | $0 | 79,183 | Feb 24, 2025 |
| Feb 20, 2025 | Jeffrey Adam Holy VP and CAO | AGrant or award Common Stock | +1,306 | $0.00 | $0 | 4,789 | Feb 24, 2025 |
| Feb 20, 2025 | James Chao Senior Chairman | AGrant or award Common Stock | +16,375 | $0.00 | $0 | 61,435 | Feb 24, 2025 |
| Feb 20, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | AGrant or award Common Stock | +2,444 | $0.00 | $0 | 17,733 | Feb 24, 2025 |
| Feb 21, 2025 | Jean-Marc Gilson President and CEO | AGrant or award Employee Option (right to buy)derivative | +26,391 | $0.00 | $0 | 26,391 | Feb 24, 2025 |
| Feb 21, 2025 | Albert Chao Executive Chairman | FTax withholding Common Stock | -13,390 | $110.54 | $1.5M | 586,885 | Feb 24, 2025 |
| Feb 21, 2025 | Mark Steven Bender EVP & CFO | FTax withholding Common Stock | -3,530 | $110.54 | $390k | 56,968 | Feb 24, 2025 |
| Feb 21, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | FTax withholding Common Stock | -2,738 | $110.54 | $303k | 34,932 | Feb 24, 2025 |
| Feb 21, 2025 | James Chao Senior Chairman | FTax withholding Common Stock | -6,554 | $110.54 | $724k | 54,881 | Feb 24, 2025 |
| Feb 21, 2025 | John Tsung-chen Chao director | AGrant or award Employee Option (right to buy)derivative | +2,772 | $0.00 | $0 | 2,772 | Feb 24, 2025 |
| Feb 21, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | FTax withholding Common Stock | -2,924 | $110.54 | $323k | 76,259 | Feb 24, 2025 |
| Feb 21, 2025 | Jean-Marc Gilson President and CEO | AGrant or award Restricted Stock Unitsderivative | +8,749 | $0.00 | $0 | 8,749 | Feb 24, 2025 |
| Feb 21, 2025 | Jeffrey Adam Holy VP and CAO | FTax withholding Common Stock | -341 | $110.54 | $38k | 4,448 | Feb 24, 2025 |
| Feb 21, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | FTax withholding Common Stock | -606 | $110.54 | $67k | 17,127 | Feb 24, 2025 |
| Feb 21, 2025 | Mark Steven Bender EVP & CFO | AGrant or award Employee Option (right to buy)derivative | +19,279 | $0.00 | $0 | 19,279 | Feb 24, 2025 |
| Feb 21, 2025 | James Chao Senior Chairman | AGrant or award Employee Option (right to buy)derivative | +37,172 | $0.00 | $0 | 37,172 | Feb 24, 2025 |
| Feb 21, 2025 | Albert Chao Executive Chairman | AGrant or award Employee Option (right to buy)derivative | +37,172 | $0.00 | $0 | 37,172 | Feb 24, 2025 |
| Feb 21, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | AGrant or award Employee Option (right to buy)derivative | +13,141 | $0.00 | $0 | 13,141 | Feb 24, 2025 |
| Feb 21, 2025 | John Tsung-chen Chao director | AGrant or award Restricted Stock Unitsderivative | +919 | $0.00 | $0 | 919 | Feb 24, 2025 |
| Feb 21, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | AGrant or award Employee Option (right to buy)derivative | +17,428 | $0.00 | $0 | 17,428 | Feb 24, 2025 |
| Feb 21, 2025 | Jeffrey Adam Holy VP and CAO | AGrant or award Employee Option (right to buy)derivative | +2,791 | $0.00 | $0 | 2,791 | Feb 24, 2025 |
| Feb 21, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | AGrant or award Employee Option (right to buy)derivative | +5,871 | $0.00 | $0 | 5,871 | Feb 24, 2025 |
| Feb 21, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | AGrant or award Restricted Stock Unitsderivative | +1,946 | $0.00 | $0 | 1,946 | Feb 24, 2025 |
| Feb 21, 2025 | Mark Steven Bender EVP & CFO | AGrant or award Restricted Stock Unitsderivative | +6,391 | $0.00 | $0 | 6,391 | Feb 24, 2025 |
| Feb 21, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | AGrant or award Restricted Stock Unitsderivative | +4,356 | $0.00 | $0 | 4,356 | Feb 24, 2025 |
| Feb 21, 2025 | Albert Chao Executive Chairman | AGrant or award Restricted Stock Unitsderivative | +12,322 | $0.00 | $0 | 12,322 | Feb 24, 2025 |
| Feb 21, 2025 | James Chao Senior Chairman | AGrant or award Restricted Stock Unitsderivative | +12,322 | $0.00 | $0 | 12,322 | Feb 24, 2025 |
| Feb 21, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | AGrant or award Restricted Stock Unitsderivative | +5,777 | $0.00 | $0 | 5,777 | Feb 24, 2025 |
| Feb 21, 2025 | Jeffrey Adam Holy VP and CAO | AGrant or award Restricted Stock Unitsderivative | +925 | $0.00 | $0 | 925 | Feb 24, 2025 |
| Feb 18, 2025 | Mark Steven Bender EVP & CFO | MOption exercise Common Stock | +13,987 | $0.00 | $0 | 56,125 | Feb 20, 2025 |
| Feb 18, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | MOption exercise Common Stock | +12,923 | $0.00 | $0 | 34,846 | Feb 20, 2025 |
| Feb 18, 2025 | Albert Chao Executive Chairman | MOption exercise Common Stock | +17,972 | $0.00 | $0 | 572,888 | Feb 20, 2025 |
| Feb 18, 2025 | James Chao Senior Chairman | MOption exercise Common Stock | +8,796 | $0.00 | $0 | 47,347 | Feb 20, 2025 |
| Feb 18, 2025 | John Tsung-chen Chao director | MOption exercise Common Stock | +513 | $0.00 | $0 | 6,709 | Feb 20, 2025 |
| Feb 18, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | MOption exercise Common Stock | +1,313 | $0.00 | $0 | 15,625 | Feb 20, 2025 |
| Feb 18, 2025 | Jeffrey Adam Holy VP and CAO | MOption exercise Common Stock | +702 | $0.00 | $0 | 3,702 | Feb 20, 2025 |
| Feb 18, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | MOption exercise Common Stock | +13,174 | $0.00 | $0 | 77,146 | Feb 20, 2025 |
| Feb 19, 2025 | Mark Steven Bender EVP & CFO | FTax withholding Common Stock | -4,264 | $111.46 | $475k | 51,861 | Feb 20, 2025 |
| Feb 19, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | FTax withholding Common Stock | -3,851 | $111.46 | $429k | 30,995 | Feb 20, 2025 |
| Feb 19, 2025 | Albert Chao Executive Chairman | FTax withholding Common Stock | -5,820 | $111.46 | $649k | 567,068 | Feb 20, 2025 |
| Feb 19, 2025 | James Chao Senior Chairman | FTax withholding Common Stock | -2,193 | $111.46 | $244k | 45,154 | Feb 20, 2025 |
| Feb 19, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | FTax withholding Common Stock | -5,052 | $111.46 | $563k | 72,094 | Feb 20, 2025 |
| Feb 19, 2025 | Jeffrey Adam Holy VP and CAO | FTax withholding Common Stock | -210 | $111.46 | $23k | 3,492 | Feb 20, 2025 |
| Feb 19, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | FTax withholding Common Stock | -322 | $111.46 | $36k | 15,303 | Feb 20, 2025 |
| Feb 18, 2025 | John Tsung-chen Chao director | MOption exercise Restricted Stock Unitsderivative | -513 | $0.00 | $0 | 0 | Feb 20, 2025 |
| Feb 19, 2025 | Mark Steven Bender EVP & CFO | FTax withholding Common Stock | -50 | $112.46 | $5,623 | 51,811 | Feb 20, 2025 |
| Feb 19, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | FTax withholding Common Stock | -164 | $112.76 | $18k | 30,831 | Feb 20, 2025 |
| Feb 19, 2025 | Albert Chao Executive Chairman | FTax withholding Common Stock | -249 | $112.73 | $28k | 566,819 | Feb 20, 2025 |
| Feb 19, 2025 | James Chao Senior Chairman | FTax withholding Common Stock | -94 | $112.76 | $11k | 45,060 | Feb 20, 2025 |
| Feb 19, 2025 | L. Benjamin Ederington EVP, PEM, GC and CAO | FTax withholding Common Stock | -216 | $112.76 | $24k | 71,878 | Feb 20, 2025 |
| Feb 19, 2025 | Jeffrey Adam Holy VP and CAO | FTax withholding Common Stock | -9 | $112.76 | $1,015 | 3,483 | Feb 20, 2025 |
| Feb 19, 2025 | Thomas J. Janssens SVP, Ops - PEM & Corp Logistic | FTax withholding Common Stock | -14 | $112.53 | $1,575 | 15,289 | Feb 20, 2025 |
| Feb 19, 2025 | Mark Steven Bender EVP & CFO | FTax withholding Common Stock | -132 | $112.76 | $15k | 51,679 | Feb 20, 2025 |
| Feb 18, 2025 | Robert F. Buesinger EVP, HIP, IT & Digital | MOption exercise Restricted Stock Unitsderivative | -12,923 | $0.00 | $0 | 0 | Feb 20, 2025 |
| Feb 18, 2025 | Albert Chao Executive Chairman | MOption exercise Restricted Stock Unitsderivative | -17,972 | $0.00 | $0 | 0 | Feb 20, 2025 |
| Feb 18, 2025 | James Chao Senior Chairman | MOption exercise Restricted Stock Unitsderivative | -8,796 | $0.00 | $0 | 0 | Feb 20, 2025 |
| Feb 18, 2025 | Jeffrey Adam Holy VP and CAO | MOption exercise Restricted Stock Unitsderivative | -702 | $0.00 | $0 | 0 | Feb 20, 2025 |
Insiders
Everyone who has filed a Form 4 here.
- Mark Steven BenderEVP & CFO
- Robert F. BuesingerEVP, PEM Segment Head
- Roger A Creggdirector
- Albert ChaoExecutive Chairman
- Catherine T. Chaodirector
- David Tsung-Hung Chaodirector
- James ChaoSenior Chairman
- John Tsung-chen Chaodirector
- Tommy DarbyVP and CAO
- L. Benjamin EderingtonEVP, PEM, GC and CAO
- Jean-Marc GilsonPresident and CEO
- Michael J Graffdirector
- Jeffrey Adam HolyVP and CAO
- Thomas J. JanssensSVP, Ops - PEM & Corp Logistic
- Kimberly S Lubeldirector
- Mark A McCollumdirector
- R Bruce Northcuttdirector
- Carolyn Chao Sabatdirector
- Jeffrey Wayne Sheetsdirector
- Scott Thomas SzwejbkaSVP, HIP
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.